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I am currently working as an Assistant (Research) Professor at The Dept. of Chemical Engineering and The Department of Bioenergy Engineering & Chemurgy, Institut Teknologi Bandung. Prior to joining ITB, I worked for Universiti Teknologi PETRONAS, Malaysia managing a research group called Waste to Energy, Catalysis and Advanced Reaction Engineering Research Group (WéCARE UTP). In Industry, I have worked for an EPC company, a gas processing company, an educational consultant, and as a Research and Production Manager (2014-2017) for a Fuel Additive company in Canada. Since then, I've been assigned as Technology Advisor for CM Technologies, Canada, and continue developing several products. I obtained my Ph.D. from the University of Calgary, Canada where I worked on several industrial research areas such as WTE conversion, fuel additive, and CO2 capture. I currently focus on the area of waste to energy conversion, enzyme biomimicry, and bio-based product development.
The aqueous phase reforming (APR) of glycerol was studied using sonochemically synthesized 10%Ni-x%Ca/ZrO2 catalysts (where x = 0, 0.5, 3, and 5) for the production of value-added liquid products. The APR reaction was performed in a batch reactor under the following conditions: 20 bar, 230 °C 450 rpm, and 1 h of reaction time. The synthesized catalysts were characterized using XRD, FESEM, BET, and H2-TPR to observe the effect of Ca doping on the physio-chemical properties of the catalysts. The results revealed that, at higher Ca loading, the catalysts experienced serious particles’ agglomeration, which resulted in a larger particles’ size, smaller surface area, and smaller pore volume owing to uneven distribution of the particles. The characterization results of the catalysts confirmed that the Us catalysts have a slightly higher surface area, pore volume, and pore size, as well as highly reducible and fine crystalline structure, compared with WI catalysts. The catalytic performance of the catalysts shows that 1,3-propanediol (1,3-PDO) and 1,2-propanediol (1,2-PDO) were the two main liquid products produced from this reaction. The highest selectivity of 1,3-PDO (23.84%) was obtained over the 10%Ni/ZrO2 catalyst, while the highest selectivity of 1,2-PDO (25.87%) was obtained over the 10%Ni-5%Ca/ZrO2 catalyst.
Ain Syuhada; Mariam Ameen; Farooq Sher; Mohammad Tazli Azizan; Aqsha Aqsha; Mohd Hizami Mohd Yusoff; Muhamad Syafiq Hazwan Ruslan. Effect of Calcium Doping Using Aqueous Phase Reforming of Glycerol over Sonochemically Synthesized Nickel-Based Supported ZrO2 Catalyst. Catalysts 2021, 11, 977 .
AMA StyleAin Syuhada, Mariam Ameen, Farooq Sher, Mohammad Tazli Azizan, Aqsha Aqsha, Mohd Hizami Mohd Yusoff, Muhamad Syafiq Hazwan Ruslan. Effect of Calcium Doping Using Aqueous Phase Reforming of Glycerol over Sonochemically Synthesized Nickel-Based Supported ZrO2 Catalyst. Catalysts. 2021; 11 (8):977.
Chicago/Turabian StyleAin Syuhada; Mariam Ameen; Farooq Sher; Mohammad Tazli Azizan; Aqsha Aqsha; Mohd Hizami Mohd Yusoff; Muhamad Syafiq Hazwan Ruslan. 2021. "Effect of Calcium Doping Using Aqueous Phase Reforming of Glycerol over Sonochemically Synthesized Nickel-Based Supported ZrO2 Catalyst." Catalysts 11, no. 8: 977.
Aqueous phase reforming (APR) of sugar alcohols to produce hydrogen and value-added chemicals derived from renewable carbohydrates are becoming more promising nowadays. In the present study, Mo-Ni/Al2O3 and Mo-Ni/H-Y zeolite catalysts were synthesized using sonochemical approach employed for aqueous phase reforming of sorbitol and glycerol. The aqueous phase reforming reaction was conducted with 10 wt% of sorbitol/glycerol in deionized water in an autoclave batch reactor. Several characterization techniques (TGA, XRD, BET, H2TPR and FESEM-EDX) were performed for all the synthesized catalysts. It was perceived from the characterization that Ni/H-Y zeolite catalysts possess better textural properties in term of particle dispersion and surface area compared to Al2O3 supported catalysts. Moreover, H-Y zeolite supported catalysts also offered better performances in term of the production of value-added chemicals where the selectivity of products is more than 20% compared to the Al2O3 supported catalysts. Some of the highly selective value-added chemicals identified were acetone, ethylene glycol 1,3-propanediol and glycerol in which 1%Mo-Ni/H-Y zeolite contributed the highest activity where the conversion is at 28.5% and 24.3% selectivity towards 1,3-propanediol in the APR of sorbitol. The most selective product in this study, 1,3-propanediol, is an expensive chemical, commonly used in polymer industries, and used as adhesives, coatings and an intermediate solvent.
Muhammad Izham Shahbudin; Dennis Mathew Jacob; Mariam Ameen; Aqsha Aqsha; Mohammad Tazli Azizan; Mohd Hizami Mohd Yusoff; Farooq Sher. Liquid value-added chemicals production from aqueous phase reforming of sorbitol and glycerol over sonosynthesized Ni-based catalyst. Journal of Environmental Chemical Engineering 2021, 9, 105766 .
AMA StyleMuhammad Izham Shahbudin, Dennis Mathew Jacob, Mariam Ameen, Aqsha Aqsha, Mohammad Tazli Azizan, Mohd Hizami Mohd Yusoff, Farooq Sher. Liquid value-added chemicals production from aqueous phase reforming of sorbitol and glycerol over sonosynthesized Ni-based catalyst. Journal of Environmental Chemical Engineering. 2021; 9 (4):105766.
Chicago/Turabian StyleMuhammad Izham Shahbudin; Dennis Mathew Jacob; Mariam Ameen; Aqsha Aqsha; Mohammad Tazli Azizan; Mohd Hizami Mohd Yusoff; Farooq Sher. 2021. "Liquid value-added chemicals production from aqueous phase reforming of sorbitol and glycerol over sonosynthesized Ni-based catalyst." Journal of Environmental Chemical Engineering 9, no. 4: 105766.
In general, aqueous phase reforming (APR) is used to convert glycerol into 1,3-propanediol (1,3-PDO), nonetheless, studies have shown a low selectivity of 1,3-PDO. Therefore, this study aims to optimize the selectivity of 1,3-PDO by varying the ultrasound (Us) irradiation process time between 10 and 50 min during catalyst preparation. This is to investigate the effect on the physiochemical properties and activity of the catalyst. Ni–Mo/Al2O3 catalysts were prepared using a sonochemical method and was characterized using Brunauer-Emmett-Teller (BET), X-ray Powder Diffractometer (XRD), Field Emission Scanning Electron Microscopy (FESEM) and Hydrogen Temperature-programmed Reduction (H2-TPR). Characterization results revealed that there were significant improvements in physiochemical properties of catalysts by varying the Ultrasound (Us) irradiation time. Subsequently, all catalysts were screened using APR of glycerol for 1,3-PDO production using an Autoclave PREMEX reactor and the liquid products were analyzed to determine the selectivity of 1,3-PDO. From all the results, findings revealed that the catalyst prepared with 10 min of Us radiation time demonstrated a high catalytic performance and physiochemical properties while producing the highest concentration of 1,3-PDO with 954 ppm with a conversion of 38.6%. The outcomes have shown that sonochemical irradiation time conversely effects on the physiochemical properties of the catalysts and 1,3-PDO production.
Francis Wang Sing Yu; Mariam Ameen; Aqsha Aqsha; Mohammad Izham; Mohammad Tazli Azizan; Farooq Sher. Effects of ultrasound irradiations time over Ni–Mo/γ-Al2O3 catalyst synthesis for 1,3 – Propanediol selectively via aqueous phase reforming of glycerol. Case Studies in Chemical and Environmental Engineering 2021, 3, 100096 .
AMA StyleFrancis Wang Sing Yu, Mariam Ameen, Aqsha Aqsha, Mohammad Izham, Mohammad Tazli Azizan, Farooq Sher. Effects of ultrasound irradiations time over Ni–Mo/γ-Al2O3 catalyst synthesis for 1,3 – Propanediol selectively via aqueous phase reforming of glycerol. Case Studies in Chemical and Environmental Engineering. 2021; 3 ():100096.
Chicago/Turabian StyleFrancis Wang Sing Yu; Mariam Ameen; Aqsha Aqsha; Mohammad Izham; Mohammad Tazli Azizan; Farooq Sher. 2021. "Effects of ultrasound irradiations time over Ni–Mo/γ-Al2O3 catalyst synthesis for 1,3 – Propanediol selectively via aqueous phase reforming of glycerol." Case Studies in Chemical and Environmental Engineering 3, no. : 100096.
Membrane fouling is a major drawback of almost all pressure-driven membrane processes that limit their widespread application. This study compares the biological and the hydraulic performances of polyvinylidene fluoride (PVDF) and polysulfone (PSF) membranes when used as external filtration for polishing of a rotating biological contactor (RBC) effluent and as an ingrated part in a membrane rotating biological contactor (MRBC). MRBC is an upgrade of the conventional RBC, in which the disk rotations are used not only to provide biological aeration but also as an inherent mechanism for membrane fouling control. Results showed that high biological performances were achieved irrespective of the membrane materials. The steady-state permeabilities of the membranes in MRBC are higher than external filtration by 92.4% and 19.7% for the PVDF and PSF membrane respectively. In the MRBC, smaller membrane-to-disk gaps and high disk rotational speed improve permeability for both membranes reaching the values of 297 and 173 L/ (m2.h.bar) for PVDF and PSF membranes, respectively. Full-scale energy consumption projection results show that the MRBC consumes only one-fourth of the energy of a referenced membrane bioreactor. The PVDF membrane outperforms PSF membrane thanks to the effective fouling control that maximize the throughput of a lower intrinsic resistance of the PVDF membrane. It implies that apart from membrane material, other operational parameters can still be optimized to further enhance the MRBC performance.
Sharjeel Waqas; Muhammad Roil Bilad; Aqsha Aqsha; Noorfidza Yub Harun; Muhammad Ayoub; Mohd Dzul Hakim Wirzal; Juhana Jaafar; Sri Mulyati; Muthia Elma. Effect of membrane properties in a membrane rotating biological contactor for wastewater treatment. Journal of Environmental Chemical Engineering 2020, 9, 104869 .
AMA StyleSharjeel Waqas, Muhammad Roil Bilad, Aqsha Aqsha, Noorfidza Yub Harun, Muhammad Ayoub, Mohd Dzul Hakim Wirzal, Juhana Jaafar, Sri Mulyati, Muthia Elma. Effect of membrane properties in a membrane rotating biological contactor for wastewater treatment. Journal of Environmental Chemical Engineering. 2020; 9 (1):104869.
Chicago/Turabian StyleSharjeel Waqas; Muhammad Roil Bilad; Aqsha Aqsha; Noorfidza Yub Harun; Muhammad Ayoub; Mohd Dzul Hakim Wirzal; Juhana Jaafar; Sri Mulyati; Muthia Elma. 2020. "Effect of membrane properties in a membrane rotating biological contactor for wastewater treatment." Journal of Environmental Chemical Engineering 9, no. 1: 104869.
This work investigates the catalytic hydrodeoxygenation (HDO) of a model component (anisole) of lignocellulose biomass over Mo‐ and V‐promoted Ni deposited on titania support. The physico‐chemical properties of each material were elucidated, and reactions were studied over a wide range of temperatures to enable examination of kinetic parameters. Crystallite sizes were estimated and were corroborated strongly by the transmission electron microscopy results. The presence of Ni, Ti, Mo, and V species was confirmed through X‐ray photoelectron spectroscopy (XPS). Significant HDO activity for both the catalysts could be attributed to high dispersions of metals and acidic sites, which were affected by the interaction between Ni metal and the titania support. The higher activity of Ni‐Mo/TiO2 may have resulted from the high Ni/Ti surface atomic ratio, which was confirmed by XPS. The major product of the anisole HDO reactions was phenol. Interestingly, a considerable amount of benzene and cyclohexane was also noticed in the anisole HDO reaction. The overall activation energy values for anisole reactions over Ni‐Mo/TiO2 and Ni‐V/TiO2 were 80.9 kJ/mol and 53.9 kJ/mol, respectively.
Aqsha Aqsha; Lakshmi Katta; Mansour Mohammedramadan Tijani; Camilla Fernandes de Oliveira; Nader Mahinpey. Investigation of catalytic hydrodeoxygenation of anisole as bio‐oil model compound over Ni‐Mo / TiO 2 and Ni‐V / TiO 2 catalysts: Synthesis, kinetic, and reaction pathways studies. The Canadian Journal of Chemical Engineering 2020, 99, 1094 -1106.
AMA StyleAqsha Aqsha, Lakshmi Katta, Mansour Mohammedramadan Tijani, Camilla Fernandes de Oliveira, Nader Mahinpey. Investigation of catalytic hydrodeoxygenation of anisole as bio‐oil model compound over Ni‐Mo / TiO 2 and Ni‐V / TiO 2 catalysts: Synthesis, kinetic, and reaction pathways studies. The Canadian Journal of Chemical Engineering. 2020; 99 (5):1094-1106.
Chicago/Turabian StyleAqsha Aqsha; Lakshmi Katta; Mansour Mohammedramadan Tijani; Camilla Fernandes de Oliveira; Nader Mahinpey. 2020. "Investigation of catalytic hydrodeoxygenation of anisole as bio‐oil model compound over Ni‐Mo / TiO 2 and Ni‐V / TiO 2 catalysts: Synthesis, kinetic, and reaction pathways studies." The Canadian Journal of Chemical Engineering 99, no. 5: 1094-1106.
The catalytic steam reforming of oxygenated hydrocarbons has been holding an interest in scientific societies for the past two decades. The hydrogen production from steam reforming of glycerol, ethanol and other oxygenates such as ethylene glycol and propylene glycol are more suitable choice not just because it can be produced from renewable sources, but it also helps to decrease the transportation fuel price and making it more competitive. In addition, hydrogen itself is a green fuel for the transportation sector. The studies on the production of hydrogen from various reforming technologies revealed a remarkable impact on the environmental and socio-economic issues. Researchers became more focused on glycerol steam reforming (GSR), ethanol steam reforming (ESR) and other oxygenates to investigate the catalyst suitability, their kinetics and challenges for the sustainability of the oil and gas production. In the present work, the authors critically addressed the challenges and strategies for hydrogen production via GSR, ESR and other oxygenates reforming process. This review covers extensively thermodynamic parametric analysis, catalysts developments, kinetics and advancement in the operational process for glycerol, ethanol and few other oxygenates. This detailed investigation only highlights the steam reforming process (SRP) of these oxygenates at the laboratory experimental stage. It was found that from this review, there are many technical issues, which lead to economic challenges. The issues are yet to be addressed and thus, these particular applications require faster accelerations at the pilot scale, taking into the consideration of the current pandemic and economic issues, for a safer and greener environment. Graphical abstract
Mohammad Tazli Azizan; Aqsha Aqsha; Mariam Ameen; Ain Syuhada; Hellgardt Klaus; Sumaiya Zainal Abidin; Farooq Sher. Catalytic reforming of oxygenated hydrocarbons for the hydrogen production: an outlook. Biomass Conversion and Biorefinery 2020, 1 -24.
AMA StyleMohammad Tazli Azizan, Aqsha Aqsha, Mariam Ameen, Ain Syuhada, Hellgardt Klaus, Sumaiya Zainal Abidin, Farooq Sher. Catalytic reforming of oxygenated hydrocarbons for the hydrogen production: an outlook. Biomass Conversion and Biorefinery. 2020; ():1-24.
Chicago/Turabian StyleMohammad Tazli Azizan; Aqsha Aqsha; Mariam Ameen; Ain Syuhada; Hellgardt Klaus; Sumaiya Zainal Abidin; Farooq Sher. 2020. "Catalytic reforming of oxygenated hydrocarbons for the hydrogen production: an outlook." Biomass Conversion and Biorefinery , no. : 1-24.
Biofouling on the membrane surface leads to performance deficiencies in membrane filtration. In this study, the application of ginger extract as a bio-based additive to enhance membrane antibiofouling properties was investigated. The extract was dispersed in a dimethyl acetamide (DMAc) solvent together with polyvinylidene fluoride (PVDF) to enhance biofouling resistance of the resulting membrane due to its antibiotic property. The concentrations of the ginger extract in the dope solution were varied in the range of 0–0.1 wt %. The antibacterial property of the resulting membranes was assessed using the Kirby Bauer disc diffusion method. The results show an inhibition zone formed around the PVDF/ginger membrane against Escherichia coli and Staphylococcus aureus demonstrating the efficacy of the residual ginger extract in the membrane matrix to impose the antibiofouling property. The addition of the ginger extract also enhanced the hydrophilicity in the membrane surface by lowering the contact angle from 93° to 85°, which was in good agreement with the increase in the pure water flux of up to 62%.
Afrillia Fahrina; Nasrul Arahman; Sri Mulyati; Sri Aprilia; Normi Izati Mat Nawi; Aqsha Aqsha; Muhammad Roil Bilad; Ryosuke Takagi; Hideto Matsuyama. Development of Polyvinylidene Fluoride Membrane by Incorporating Bio-Based Ginger Extract as Additive. Polymers 2020, 12, 2003 .
AMA StyleAfrillia Fahrina, Nasrul Arahman, Sri Mulyati, Sri Aprilia, Normi Izati Mat Nawi, Aqsha Aqsha, Muhammad Roil Bilad, Ryosuke Takagi, Hideto Matsuyama. Development of Polyvinylidene Fluoride Membrane by Incorporating Bio-Based Ginger Extract as Additive. Polymers. 2020; 12 (9):2003.
Chicago/Turabian StyleAfrillia Fahrina; Nasrul Arahman; Sri Mulyati; Sri Aprilia; Normi Izati Mat Nawi; Aqsha Aqsha; Muhammad Roil Bilad; Ryosuke Takagi; Hideto Matsuyama. 2020. "Development of Polyvinylidene Fluoride Membrane by Incorporating Bio-Based Ginger Extract as Additive." Polymers 12, no. 9: 2003.
In the current study, microwave-assisted glycerol polymerization for short-chain polyglycerol production was conducted unprecedentedly over low-cost catalyst, lithium-modified aluminium pillared clay (Li/AlPC) catalysts without the solvent. The influences of disparate reaction parameters such as the effects of Li loadings (10, 20, 30 wt.%), catalyst loadings (2, 3, 4 wt.%), operating temperatures (200, 220, 240 °C) and operating times (1–4 h) on the glycerol conversions, and polyglycerol yield (particularly for diglycerol and triglycerol), were elucidated. The fresh catalysts were subjected to physicochemical properties evaluation via characterization techniques, viz. N2 physisorption, XRD, SEM, NH3-TPD and CO2-TPD. In comparison, 20 wt.% Li/AlPC demonstrated the best performance under non-conventional heating, credited to its outstanding textural properties (an increase of basal spacing to 21 Ȧ, high surface area of 95.48 m2/g, total basicity of 34.48 mmol/g and average pore diameter of 19.21 nm). Within the studied ranges, the highest glycerol conversion (98.85%) and polyglycerol yield (90.46%) were achieved when catalyst loading of 3 wt.%, reaction temperature of 220 °C and reaction time of 3 h were adopted. The results obtained also anticipated the higher energy efficiency of microwave-assisted polymerization than conventional technique (>8 h), as the reaction time for the former technology was shorter to attain the highest product yield. The study performed could potentially conduce the wise utilization of surplus glycerol generated from the biodiesel industry.
Muhammad Sajid; Muhammad Ayoub; Suzana Yusup; Bawadi Abdullah; Rashid Shamsuddin; Roil Bilad; Chi Cheng Chong; Aqsha Aqsha. Short-Chain Polyglycerol Production via Microwave-Assisted Solventless Glycerol Polymerization Process Over Lioh-Modified Aluminium Pillared Clay Catalyst: Parametric Study. Processes 2020, 8, 1093 .
AMA StyleMuhammad Sajid, Muhammad Ayoub, Suzana Yusup, Bawadi Abdullah, Rashid Shamsuddin, Roil Bilad, Chi Cheng Chong, Aqsha Aqsha. Short-Chain Polyglycerol Production via Microwave-Assisted Solventless Glycerol Polymerization Process Over Lioh-Modified Aluminium Pillared Clay Catalyst: Parametric Study. Processes. 2020; 8 (9):1093.
Chicago/Turabian StyleMuhammad Sajid; Muhammad Ayoub; Suzana Yusup; Bawadi Abdullah; Rashid Shamsuddin; Roil Bilad; Chi Cheng Chong; Aqsha Aqsha. 2020. "Short-Chain Polyglycerol Production via Microwave-Assisted Solventless Glycerol Polymerization Process Over Lioh-Modified Aluminium Pillared Clay Catalyst: Parametric Study." Processes 8, no. 9: 1093.
An electrochemical nanoflowers manganese oxide (MnO2) catalyst has gained much interest due to its high stability and high specific surface area. However, there are a lack of insightful studies of electrocatalyst performance in nanoflower MnO2. This study assesses the electrocatalytic performances of nanoflower structure MnO2 for both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in a zinc–air battery as a bifunctional electrocatalyst. The prepared catalyst was characterized in term of morphology, crystallinity, and total surface area. Cyclic voltammetry and linear sweep voltammetry were used to evaluate the electrochemical behaviors of the as-prepared nanoflower-like MnO2. The discharge performance test for zinc–air battery with a MnO2 catalyst was also conducted. The results show that the MnO2 prepared at dwell times of 2, 4 and 6 h were nanoflowers, nanoflower mixed with nanowires, and nanowires with corresponding specific surface areas of 52.4, 34.9 and 32.4 g/cm2, respectively. The nanoflower-like MnO2 catalyst exhibits a better electrocatalytic performance towards both ORR and OER compared to the nanowires. The number of electrons transferred for the MnO2 with nanoflower, nanoflower mixed with nanowires, and nanowire structures is 3.68, 3.31 and 3.00, respectively. The as-prepared MnO2 nanoflower-like structure exhibits the best discharge performance of 31% higher than the nanowires and reaches up to 30% of the theoretical discharge capacity of the zinc–air battery.
Siow Jing Han; Mariam Ameen; Mohamad Fahrul Radzi Hanifah; Aqsha Aqsha; Muhammad Roil Bilad; Juhana Jaafar; Soorathep Kheawhom. Catalytic Evaluation of Nanoflower Structured Manganese Oxide Electrocatalyst for Oxygen Reduction in Alkaline Media. Catalysts 2020, 10, 822 .
AMA StyleSiow Jing Han, Mariam Ameen, Mohamad Fahrul Radzi Hanifah, Aqsha Aqsha, Muhammad Roil Bilad, Juhana Jaafar, Soorathep Kheawhom. Catalytic Evaluation of Nanoflower Structured Manganese Oxide Electrocatalyst for Oxygen Reduction in Alkaline Media. Catalysts. 2020; 10 (8):822.
Chicago/Turabian StyleSiow Jing Han; Mariam Ameen; Mohamad Fahrul Radzi Hanifah; Aqsha Aqsha; Muhammad Roil Bilad; Juhana Jaafar; Soorathep Kheawhom. 2020. "Catalytic Evaluation of Nanoflower Structured Manganese Oxide Electrocatalyst for Oxygen Reduction in Alkaline Media." Catalysts 10, no. 8: 822.
Anaerobic digestion (AD) is one of the renewable technologies and a good alternative for the management of livestock manure. The present study focuses on co-digestion of fresh chicken manure (FCM) with corn stover (CS) experiments for biogas production. The objective of this study is to evaluate the effect of corn stover in the production of biogas and methane content by co-digestion. The mixing ratios of co-digestion of FCM with CS were 1:1, 1:2, and 2:1. The total solids for co-digestion were 8% for all ratios. The results showed that the ratio of 2:1 produced the highest biogas yield (46.7 m3/ton of slurry) and 53.2% of methane purity. The pH fluctuated around a range of 5.2 to 7.9 due to different stages of anaerobic digestion as a result of microbe’s activity.
Siti Aminah Mohd Johari; Aqsha Aqsha; Noridah B. Osman; M. Rashid Shamsudin; Mariam Ameen; Sharul Sham Dol. Enhancing biogas production in anaerobic co-digestion of fresh chicken manure with corn stover at laboratory scale. SN Applied Sciences 2020, 2, 1 -6.
AMA StyleSiti Aminah Mohd Johari, Aqsha Aqsha, Noridah B. Osman, M. Rashid Shamsudin, Mariam Ameen, Sharul Sham Dol. Enhancing biogas production in anaerobic co-digestion of fresh chicken manure with corn stover at laboratory scale. SN Applied Sciences. 2020; 2 (7):1-6.
Chicago/Turabian StyleSiti Aminah Mohd Johari; Aqsha Aqsha; Noridah B. Osman; M. Rashid Shamsudin; Mariam Ameen; Sharul Sham Dol. 2020. "Enhancing biogas production in anaerobic co-digestion of fresh chicken manure with corn stover at laboratory scale." SN Applied Sciences 2, no. 7: 1-6.
The production of biodiesel production has been surged throughout the decades due to the conventional transesterification process of edible, non-edible, and waste cooking oil to replace fossil-based fuels. Regrettably, this acclaimed process undeniably accompanied by glycerol generation as its primary by-product. The synchronous inclining trend of glycerol production with blooming biodiesel industries urged the wise utilization of market-surplus crude glycerol as well as to boost the market price of glycerol. One of the promising technologies for waste glycerol utilization is catalytic glycerol etherification for valuable polyglycerol (especially di- and triglycerol) production. Thus, the role of the catalysts during the reaction is noteworthy for the excellent glycerol conversion and short-chain polyglycerol yield. In this review, the homogeneous and heterogeneous catalysts reported in previous literature are reviewed and compared. The promising heterogeneous catalysts for glycerol etherification was divided into three main categories, viz. microporous, mesoporous, and macroporous. The recent wide application of cost-effective, highly stable, and environmentally benign natural clays as an alternative heterogeneous catalyst has also been included together with their modification treatments. Overall, this review provides appraisals on various catalysts used and challenges faced upon utilizing low-value surplus glycerol into valuable polyglycerol. Lastly, this review attempts to propose further investigations and explorations on more promising green catalysts as a substitution over commercial catalysts as one of the schemes for the future prospects of glycerol etherification.
Chi Cheng Chong; Aqsha Aqsha; Muhammad Ayoub; Muhammad Sajid; Ahmad Zuhairi Abdullah; Suzana Yusup; Bawadi Abdullah. A review over the role of catalysts for selective short-chain polyglycerol production from biodiesel derived waste glycerol. Environmental Technology & Innovation 2020, 19, 100859 .
AMA StyleChi Cheng Chong, Aqsha Aqsha, Muhammad Ayoub, Muhammad Sajid, Ahmad Zuhairi Abdullah, Suzana Yusup, Bawadi Abdullah. A review over the role of catalysts for selective short-chain polyglycerol production from biodiesel derived waste glycerol. Environmental Technology & Innovation. 2020; 19 ():100859.
Chicago/Turabian StyleChi Cheng Chong; Aqsha Aqsha; Muhammad Ayoub; Muhammad Sajid; Ahmad Zuhairi Abdullah; Suzana Yusup; Bawadi Abdullah. 2020. "A review over the role of catalysts for selective short-chain polyglycerol production from biodiesel derived waste glycerol." Environmental Technology & Innovation 19, no. : 100859.
Torréfaction is a well-known method to thermally treats biomass at lower temperature range (200 to 300 °C) under inert atmosphere. However, the continuous supply of pure inert gas on large scale resist the commercialisation of this process. To investigate the effect of combustion gas (flue gas) on torrefaction performance of oil palm fronds leaves (OPFL) and stems (OPFS), both samples were torrefied at 200 °C for 30 min in a vertical tubular reactor under the atmosphere of combustion gas produced from wood pellets and nitrogen (inert) gas. The major components of combustion gas were nitrogen and carbon dioxide (total 76 vol% to 83 vol%) and the rest of the mixture contained oxygen, carbon monoxide and hydrogen. The effects of combustion gas atmosphere on the torrefaction performance of OPFL and OPFS including solid yield, calorific value, energy yield, proximate and ultimate compositions were investigated and compared with those of nitrogen atmosphere torrefaction. The combustion gas torrefaction resulted in lower solid yield and energy yield but with higher energy density (calorific value, carbon content) as compared to nitrogen torrefaction. Under combustion gas atmosphere, torrefaction of OPF stems gave higher solid yield (84.66 wt%) than OPF leaves (80.85 wt%) while solid yield of both samples under nitrogen atmosphere was almost same (88.02 wt% and 88.54 wt%). The increase in solid conversion under combustion atmosphere was caused by the partial oxidation took place in the presence of oxygen. Non-condensable gases at the outlet of the torrefaction reactor contained carbon dioxide and carbon monoxide.
Premchand; Masaharu Komiyama; Aqsha Aqsha; Yoshimitsu Uemura. Effect of combustion and nitrogen gas atmospheres on the torrefaction performance of oil palm frond leaves and stems. IOP Conference Series: Materials Science and Engineering 2020, 736, 1 .
AMA StylePremchand, Masaharu Komiyama, Aqsha Aqsha, Yoshimitsu Uemura. Effect of combustion and nitrogen gas atmospheres on the torrefaction performance of oil palm frond leaves and stems. IOP Conference Series: Materials Science and Engineering. 2020; 736 ():1.
Chicago/Turabian StylePremchand; Masaharu Komiyama; Aqsha Aqsha; Yoshimitsu Uemura. 2020. "Effect of combustion and nitrogen gas atmospheres on the torrefaction performance of oil palm frond leaves and stems." IOP Conference Series: Materials Science and Engineering 736, no. : 1.
Hydrodeoxygenation (HDO) is considered as a substantial path for cleaner production of fatty acids and triglycerides into diesel range hydrocarbons (DRHs) (C15-C18) generally identified as green diesel fuel (GDF). Heterogeneous catalysis suggests a supplementary approach for the conversion of biomass into significant bio-chemicals possibly selective hydrocarbons by an inventive method. The present study reveals the optimization of reaction parameters for the process of HDO of rubber seed oil (RSO) over the transition metals NiMo/γ-Al2O3 (NMA) catalyst (designed via sonochemical co-impregnation approach) into (DRHs) i.e. (n-C15-n-C18). The comprehensive studies have been performed to investigate the parametric effects employing Response Surface Methodology (RSM) using Central Composite Design (CCD).The experimental design was conducted on four most influential operating factors i.e. temperature within the range of 300-400ºC, weight hourly space velocity (WHSV) (1-3 h-1), H2: oil ratio (400-1000 N cm3/cm3 and pressure (30-80 bar), and for triglycerides conversion and (DRHs) yield. All the experimental runs were performed in continuous process using fixed bed tubular reactor (FTBR) over NMA catalyst. The product analysis showed that triglycerides are completely hydrodeoxygenated into (DRHs) with optimum production of 84.94 wt. % yield led by prime reaction conditions at the temperature of 400°C, WHSV 1 h-1, pressure 80 bar and H2: oil ratio 400 N(cm3/cm3). The parametric interaction between temperature and WHSV has significantly influenced the diesel yield. The investigations validated that HDO tracked on corresponding reaction condition in competitive mode and obligated the diverse optimum and limiting reaction conditions. In addition, deactivation of catalyst study was performed at optimized reaction condition. The catalyst was found to be active until 18 hours without bringing to sulphidization process up 80% diesel yield with 100% triglycerides conversion. The slight deactivation of the catalyst is observed, with very small amount coke deposition even after 18 h of time on stream at optimized reaction condition. The novelty of present study lies in the performance of sonochemically synthesized catalyst (SSC) for HDO of RSO to produce green diesel and to optimized reaction condition as well as catalysts deactivation performance at optimized reaction conditions.
Mariam Ameen; Mohammad Tazli Azizan; Suzana Yusup; Anita Ramli; Muhammad Shahbaz; Aqsha Aqsha; Haswin Kaur; Cheah Kin Wai. Parametric Studies on Hydrodeoxygenation of Rubber Seed Oil for Diesel Range Hydrocarbon Production. Energy & Fuels 2020, 34, 4603 -4617.
AMA StyleMariam Ameen, Mohammad Tazli Azizan, Suzana Yusup, Anita Ramli, Muhammad Shahbaz, Aqsha Aqsha, Haswin Kaur, Cheah Kin Wai. Parametric Studies on Hydrodeoxygenation of Rubber Seed Oil for Diesel Range Hydrocarbon Production. Energy & Fuels. 2020; 34 (4):4603-4617.
Chicago/Turabian StyleMariam Ameen; Mohammad Tazli Azizan; Suzana Yusup; Anita Ramli; Muhammad Shahbaz; Aqsha Aqsha; Haswin Kaur; Cheah Kin Wai. 2020. "Parametric Studies on Hydrodeoxygenation of Rubber Seed Oil for Diesel Range Hydrocarbon Production." Energy & Fuels 34, no. 4: 4603-4617.
Short-chain oligomers such as dimers and trimers are highly valued products because of their excellent biocompatibility caused by the presence of multi-hydrophilic groups within their structures. Conventionally, oligomers are produced via solvent-free glycerol etherification reactions using a simple heating process. However, the process requires a long reaction time (>7 h). Therefore, this work aims to minimize the reaction time by using microwave irradiation as a heating source and to enhance the yield of dimers and trimers by using a catalyst prepared from clay as an economical material for glycerol etherification. Thus, lithium-intercalated montmorillonite clay (Li/mk-10) was prepared via the wet impregnation method. The maximum 98% glycerol conversion was achieved in 4 h with the maximum dimer yield of 45% in 3 h.
Muhammad Sajid; Muhammad Ayoub; Yoshimitsu Uemura; Suzana Yusup; Bawadi B Abdullah; Sami Ullah; Aqsha Aqsha. Catalytic Activity of Intercalated Montmorillonite Clay for Glycerol Conversion to Oligomers via Microwave Irradiation. Journal of the Japan Institute of Energy 2020, 99, 16 -19.
AMA StyleMuhammad Sajid, Muhammad Ayoub, Yoshimitsu Uemura, Suzana Yusup, Bawadi B Abdullah, Sami Ullah, Aqsha Aqsha. Catalytic Activity of Intercalated Montmorillonite Clay for Glycerol Conversion to Oligomers via Microwave Irradiation. Journal of the Japan Institute of Energy. 2020; 99 (1):16-19.
Chicago/Turabian StyleMuhammad Sajid; Muhammad Ayoub; Yoshimitsu Uemura; Suzana Yusup; Bawadi B Abdullah; Sami Ullah; Aqsha Aqsha. 2020. "Catalytic Activity of Intercalated Montmorillonite Clay for Glycerol Conversion to Oligomers via Microwave Irradiation." Journal of the Japan Institute of Energy 99, no. 1: 16-19.
The process optimization of hydrodeoxygenation of rubber seed oil was investigated on diesel range hydrocarbons selectivity and conversion of reaction intermediates. The comprehensive investigation has been performed on effects of reaction parameters and optimization condition using Response Surface Methodology. The experimental runs were carried out over four operating parameters i.e. temperature (300-400 °C), pressure (30–80 bar), weight hourly space velocity (WHSV) (1-3 h−1) and H2: oil ratio (400–1000 N cm3/cm3). The reaction intermediates were investigated over optimized reaction parameters for 5 h time on stream. The current study revealed that triglycerides are completely converted into diesel range hydrocarbons to produce hydrodeoxygenation (HDO) selectivity (C16 + C18) of (19.1 wt%) and decarboxylation (DCOx) selectivity (C16 + C18) of (81.7 wt%) under optimized reaction condition at the temperature of 400 °C, pressure 80 bar, WHSV = 1 h−1, and H2: oil ratio 400 N(cm3/cm3). Among all the variables temperature and weight hourly space velocity have significantly influenced the hydrodeoxygenation selectivity. In contrast, where the increase in temperature and pressure dropped the decarboxylation selectivity. H2: oil ratio was observed with significant effect on conversion of transition state of intermediates to stable state of intermediates at optimized condition. The ANOVA analyses demonstrated that HDO selectivity competitively followed on respective reaction condition.
Mariam Ameen; Mohammad Tazli Azizan; Suzana Yusup; Anita Ramli; Muhammad Shahbaz; Aqsha Aqsha. Process optimization of green diesel selectivity and understanding of reaction intermediates. Renewable Energy 2019, 149, 1092 -1106.
AMA StyleMariam Ameen, Mohammad Tazli Azizan, Suzana Yusup, Anita Ramli, Muhammad Shahbaz, Aqsha Aqsha. Process optimization of green diesel selectivity and understanding of reaction intermediates. Renewable Energy. 2019; 149 ():1092-1106.
Chicago/Turabian StyleMariam Ameen; Mohammad Tazli Azizan; Suzana Yusup; Anita Ramli; Muhammad Shahbaz; Aqsha Aqsha. 2019. "Process optimization of green diesel selectivity and understanding of reaction intermediates." Renewable Energy 149, no. : 1092-1106.
This project is aimed at studying the applicability of nanocellulose-based surfactant as a sustainable surfactant for enhanced oil recovery process (EOR) in Malaysia. Abundant biomass waste from palm oil industry in Malaysia is hard to be disposed of. Therefore, potential application of biomass in chemical EOR is an attractive alternative to minimize these problems. For this study, nanocellulose is synthesized from oil palm empty fruit bunch (OPEFB) and undergoes chemical modification for it to act like a surfactant. All methods and techniques in synthesizing nanocellulose and preparing nanocellulose-based surfactant are made inhouse. While waiting for the material preparation, adsorption study is carried out by using anionic synthetic surfactant. Characterization result shows the nanocellulose undergoes chemical modification successfully. The IFT results for the nanocellulose-based surfactants are also in a good and acceptable range, but there are some limitations in using nanocellulose-synthesized surfactant. The average particle size of nanocellulose is 283.5 µm which is larger than size of the reservoir pore throat. Dynamic adsorption cannot be performed as the large particle size of nanocellulose might plug the porous domains. Therefore, it is recommended to further improve the method of synthesizing nanocellulose from OPEFB because the nanocellulose-based surfactant is expected to have potential of lower adsorption in porous media once it becomes nanosized and due to its advantages such as being of lower cost and environmental friendly compared to other commercial surfactants.
Muhammad Ayoub; Mysara Eissa Mohyaldinn; Syed Mohammad Mahmood; Aqsha Aqsha; Shiferaw Regassa Jufar; Sarah Farrukh; Farrukh Inayat; Muhammad Rashid Shamsuddin. A comparative study of dynamic adsorption of anionic synthetic and nanocellulose-based surfactant in Malaysian reservoir. Journal of Petroleum Exploration and Production Technology 2019, 10, 311 -318.
AMA StyleMuhammad Ayoub, Mysara Eissa Mohyaldinn, Syed Mohammad Mahmood, Aqsha Aqsha, Shiferaw Regassa Jufar, Sarah Farrukh, Farrukh Inayat, Muhammad Rashid Shamsuddin. A comparative study of dynamic adsorption of anionic synthetic and nanocellulose-based surfactant in Malaysian reservoir. Journal of Petroleum Exploration and Production Technology. 2019; 10 (2):311-318.
Chicago/Turabian StyleMuhammad Ayoub; Mysara Eissa Mohyaldinn; Syed Mohammad Mahmood; Aqsha Aqsha; Shiferaw Regassa Jufar; Sarah Farrukh; Farrukh Inayat; Muhammad Rashid Shamsuddin. 2019. "A comparative study of dynamic adsorption of anionic synthetic and nanocellulose-based surfactant in Malaysian reservoir." Journal of Petroleum Exploration and Production Technology 10, no. 2: 311-318.
Mansour Mohammedramadan Tijani; Aqsha Aqsha; Ningyu Yu; Nader Mahinpey. Determination of redox pathways of supported bimetallic oxygen carriers in a methane fuelled chemical looping combustion system. Fuel 2018, 233, 133 -145.
AMA StyleMansour Mohammedramadan Tijani, Aqsha Aqsha, Ningyu Yu, Nader Mahinpey. Determination of redox pathways of supported bimetallic oxygen carriers in a methane fuelled chemical looping combustion system. Fuel. 2018; 233 ():133-145.
Chicago/Turabian StyleMansour Mohammedramadan Tijani; Aqsha Aqsha; Ningyu Yu; Nader Mahinpey. 2018. "Determination of redox pathways of supported bimetallic oxygen carriers in a methane fuelled chemical looping combustion system." Fuel 233, no. : 133-145.
Biogas is a clean and renewable form of energy that can be produced from organic waste via anaerobic digestion using a bio-digester. Fixed dome, floating drum and plug flow digester is few of typical digester design that has been used around the world. The sizes of these reactors varies depending on the organic loading rate of the available organic waste as well as the retention time of the substrate inside the reactor. In most cases, bio-digester requires large area, constant agitation and very stable environment. Despite its numerous advantages, the potential of biogas technology depends on many factors including feedstock type, reactor design and operation parameters. Even though many studies have been done to understand the effect of these factors, there are not many study that focus on the design of the reactor to optimize the potential of biogas production from food waste. In this study, the use of multi stage reactor that requires smaller footprint will be tested to enhance the gas production rate from solid substrates (food waste and other organic materials). The study includes experiment to study the effect of stages inside the reactor, composition of substrate and size of food waste on the biogas production. The results show that the stages do have effect on the gas production. With the present of stages inside the reactor, the gas production can be increased up to 30 %. In addition, the amount of protein increases gas production. However, if the protein hydrolysis rate is high, it can disturb the process since the methanogenesis favour neutral pH.
Masrihan Abu Hasan; Aqsha; Zulfan Adi Putra; Muhammad Roil Bilad; Nik Abdul Hadi Sapiaa; Mohd Dzul Hakim Wirzal; Mansour Mohammedramadan Tijani. Biogas production from chicken food waste and cow manure via multi-stages anaerobic digestion. AIP Conference Proceedings 2018, 2016, 020011 .
AMA StyleMasrihan Abu Hasan, Aqsha, Zulfan Adi Putra, Muhammad Roil Bilad, Nik Abdul Hadi Sapiaa, Mohd Dzul Hakim Wirzal, Mansour Mohammedramadan Tijani. Biogas production from chicken food waste and cow manure via multi-stages anaerobic digestion. AIP Conference Proceedings. 2018; 2016 (1):020011.
Chicago/Turabian StyleMasrihan Abu Hasan; Aqsha; Zulfan Adi Putra; Muhammad Roil Bilad; Nik Abdul Hadi Sapiaa; Mohd Dzul Hakim Wirzal; Mansour Mohammedramadan Tijani. 2018. "Biogas production from chicken food waste and cow manure via multi-stages anaerobic digestion." AIP Conference Proceedings 2016, no. 1: 020011.
Synthesis and characterization of supported metal-based oxygen carriers were carried out to provide information related to the use of oxygen carriers for chemical looping combustion processes. The Cu, Co, Fe, Ni metals supported with Al2O3, CeO2, TiO2, ZrO2 were prepared using the wetness impregnation technique. Then, the X-ray Diffraction (XRD) characterization of oxidized and reduced samples was obtained and presented. The kinetic analysis using Thermogravimetric analyzer (TGA) of the synthesized samples was conducted. The kinetics of reduction reaction of all samples were estimated and explained.
Mansour Mohammedramadan Tijani; Aqsha Aqsha; Nader Mahinpey. X-ray diffraction and TGA kinetic analyses for chemical looping combustion applications. Data in Brief 2017, 17, 200 -209.
AMA StyleMansour Mohammedramadan Tijani, Aqsha Aqsha, Nader Mahinpey. X-ray diffraction and TGA kinetic analyses for chemical looping combustion applications. Data in Brief. 2017; 17 ():200-209.
Chicago/Turabian StyleMansour Mohammedramadan Tijani; Aqsha Aqsha; Nader Mahinpey. 2017. "X-ray diffraction and TGA kinetic analyses for chemical looping combustion applications." Data in Brief 17, no. : 200-209.
Mansour Mohammedramadan Tijani; Aqsha Aqsha; Nader Mahinpey. Synthesis and study of metal-based oxygen carriers (Cu, Co, Fe, Ni) and their interaction with supported metal oxides (Al2O3, CeO2, TiO2, ZrO2) in a chemical looping combustion system. Energy 2017, 138, 873 -882.
AMA StyleMansour Mohammedramadan Tijani, Aqsha Aqsha, Nader Mahinpey. Synthesis and study of metal-based oxygen carriers (Cu, Co, Fe, Ni) and their interaction with supported metal oxides (Al2O3, CeO2, TiO2, ZrO2) in a chemical looping combustion system. Energy. 2017; 138 ():873-882.
Chicago/Turabian StyleMansour Mohammedramadan Tijani; Aqsha Aqsha; Nader Mahinpey. 2017. "Synthesis and study of metal-based oxygen carriers (Cu, Co, Fe, Ni) and their interaction with supported metal oxides (Al2O3, CeO2, TiO2, ZrO2) in a chemical looping combustion system." Energy 138, no. : 873-882.