This page has only limited features, please log in for full access.

Unclaimed
Muhammad Mufti Azis
Department of Chemical Engineering, Faculty of Engineering, Universitas Gadjah Mada, Yogyakarta, 55281, Indonesia

Basic Info

Basic Info is private.

Honors and Awards

The user has no records in this section


Career Timeline

The user has no records in this section.


Short Biography

The user biography is not available.
Following
Followers
Co Authors
The list of users this user is following is empty.
Following: 0 users

Feed

Research article
Published: 26 July 2021 in Heliyon
Reads 0
Downloads 0

Developing a kinetic model to analyze the multi-step reaction of biomass pyrolysis is pivotal to elucidate the mechanism of the pyrolysis. For this purpose, a model-fitting method such as multi-distribution the Distributed Activation Energy Model (DAEM) is one of the most reliable methods. DAEM with 4 different distribution functions of Gaussian, Logarithmic, Gumbel, and Cauchy was utilized to characterize the pyrolysis of cellulose and lignin during Thermogravimetric Analysis/Differential Scanning Calorimetry (TGA/DSC) instrumentation. By comparing Derivative Thermogravimetry (DTG) and DSC profiles, determination of pseudo-components can be done more accurately. A kinetics analysis on the pyrolysis of cellulose with a single Gaussian distribution DAEM yielded a single activation energy of 178 kJ mol−1 with a narrow standard deviation. This result was justified by a single and dominant endothermic peak followed by minor exothermic peaks in the DSC result. For lignin pyrolysis, the presence of multiple peaks is characterized by four pseudo-components in DAEM with activation energies of 157, 174, 194, and 200 kJ mol−1. These pseudo-components were confirmed by the DSC result which indicated the occurrences of two exothermic peaks with two lesser exothermic or possibly endothermic peaks at the same temperature range. These findings imply the importance of DSC to support a kinetics study of thermogravimetric pyrolysis.

ACS Style

Jonas Kristanto; Muhammad Mufti Azis; Suryo Purwono. Multi-distribution activation energy model on slow pyrolysis of cellulose and lignin in TGA/DSC. Heliyon 2021, 7, 1 .

AMA Style

Jonas Kristanto, Muhammad Mufti Azis, Suryo Purwono. Multi-distribution activation energy model on slow pyrolysis of cellulose and lignin in TGA/DSC. Heliyon. 2021; 7 (7):1.

Chicago/Turabian Style

Jonas Kristanto; Muhammad Mufti Azis; Suryo Purwono. 2021. "Multi-distribution activation energy model on slow pyrolysis of cellulose and lignin in TGA/DSC." Heliyon 7, no. 7: 1.

Journal article
Published: 28 June 2021 in Sustainability
Reads 0
Downloads 0

Municipal solid waste (MSW) processing is still problematic in Indonesia. From the hierarchy of waste management, it is clear that energy recovery from waste could be an option after prevention and the 5R (rethink, refuse, reduce, reuse, recycle) processes. The Presidential Regulation No 35/2018 mandated the acceleration of waste-to-energy (WtE) plant adoption in Indonesia. The present study aimed to demonstrate a techno-economic evaluation of a commercial WtE plant in Indonesia by processing 1000 tons of waste/day to produce ca. 19.7 MW of electricity. The WtE electricity price is set at USD 13.35 cent/kWh, which is already higher than the average household price at USD 9.76 cent/kWh. The capital investment is estimated at USD 102.2 million. The annual operational cost is estimated at USD 12.1 million and the annual revenue at USD 41.6 million. At this value, the internal rate of return (IRR) for the WtE plant is 25.32% with a payout time (PoT) of 3.47 years. In addition, this study also takes into account electricity price sales, tipping fee, and pretreatment cost of waste. The result of a sensitivity analysis showed that the electricity price was the most sensitive factor. This study reveals that it is important to maintain a regulated electricity price to ensure the sustainability of the WtE plant in Indonesia.

ACS Style

Muhammad Azis; Jonas Kristanto; Chandra Purnomo. A Techno-Economic Evaluation of Municipal Solid Waste (MSW) Conversion to Energy in Indonesia. Sustainability 2021, 13, 7232 .

AMA Style

Muhammad Azis, Jonas Kristanto, Chandra Purnomo. A Techno-Economic Evaluation of Municipal Solid Waste (MSW) Conversion to Energy in Indonesia. Sustainability. 2021; 13 (13):7232.

Chicago/Turabian Style

Muhammad Azis; Jonas Kristanto; Chandra Purnomo. 2021. "A Techno-Economic Evaluation of Municipal Solid Waste (MSW) Conversion to Energy in Indonesia." Sustainability 13, no. 13: 7232.

Conference paper
Published: 27 May 2020 in IOP Conference Series: Materials Science and Engineering
Reads 0
Downloads 0

Turpentine is a non-wood forest product derived from pine trees. Turpentine oil can be produced from the distillation of pine tree sap (family Pinaceae). The main component of turpentine is α-pinene, and turpentine isomerization may produce various derivative products. The objective of the present study was to investigate the isomerization products of turpentine oil with two acid catalysts: hydrochloric and acetic acid. Here, the influence of acid concentration was investigated by using various concentrations of hydrochloric and acetic acid concentrations between 0.4 to 1 M. Further, the combination of acetic acid and hydrochloric acid as catalyst was also investigated by varying the molar ratio of HCl:Acetic Acid=1 : 0.5 and 1:1. The experiments were carried out in a batch reactor equipped with heater, condenser, and stirrer. The reaction temperatures were maintained at 150°C and reaction time of 6 h. The resulting products from turpentine isomerization were analyzed using GC-MS. The results showed that the largest isomerization product obtained with HCl and combination of HCl:H.Acetic was trans sabinene hydrate. Additional products that could be detected varied among α-terpinolene, α-terpineol, α-terpinene, γ-terpinene and δ-carene. The experimental data showed that α-pinene conversion as high as 62, 63 and 57% were obtained by using HCl concentrations of 0.4, 0.7 and 1 M, respectively. In addition, the use of HCl:H.Acetic=1 :0.5 and 1:1 gave final conversion of 63 and 61%. The modeling results showed the kinetic model for pinene conversion for both catalysts was

ACS Style

Muhammad Mufti Azis; Farahfestura Rio Qani’A; Suci Indah Pratiwi; Jonas Kristanto; Suryo Purwono; Antonius Indarto. Kinetic studies of turpentine isomerization using hydrochloric acid and acetic acid as catalysts. IOP Conference Series: Materials Science and Engineering 2020, 823, 1 .

AMA Style

Muhammad Mufti Azis, Farahfestura Rio Qani’A, Suci Indah Pratiwi, Jonas Kristanto, Suryo Purwono, Antonius Indarto. Kinetic studies of turpentine isomerization using hydrochloric acid and acetic acid as catalysts. IOP Conference Series: Materials Science and Engineering. 2020; 823 ():1.

Chicago/Turabian Style

Muhammad Mufti Azis; Farahfestura Rio Qani’A; Suci Indah Pratiwi; Jonas Kristanto; Suryo Purwono; Antonius Indarto. 2020. "Kinetic studies of turpentine isomerization using hydrochloric acid and acetic acid as catalysts." IOP Conference Series: Materials Science and Engineering 823, no. : 1.

Conference paper
Published: 01 May 2020 in IOP Conference Series: Materials Science and Engineering
Reads 0
Downloads 0

Diabetes is a complex multifactorial disease where a person endures hyperglycemia in a long period. There have been large interest to perform dynamic simulation of insulin-glucose interaction to obtain a new insight of glucose homeostasis in a diabetic patient. Type 1 diabetes is characterized by the inability of β-cell in the pancreas to produce insulin and hence type 1 diabetes patient needs continuous insulin injection throughout their lives. Here, an educational module for process control in chemical engineering education has been developed to describe the insulin-glucose interaction. The model used an extended version of the minimal model (Bergman model) to simulate the interaction of insulin-glucose using state-space and SIMULINK. The state-space model development through classic linearization method followed by open-loop as well as a closed-loop simulation in SIMULINK was presented. The model was then used to simulate the meal disturbance over 24 h of simulation time. Various PI parameters were compared based on ITAE tuning methods in order to evaluate the dynamics of insulin-glucose interaction.

ACS Style

Muhammad Mufti Azis; Jonas Kristanto; Sarto. Dynamic simulation of insulin-glucose interaction in type 1 diabetes with MATLAB Simulink®. IOP Conference Series: Materials Science and Engineering 2020, 778, 1 .

AMA Style

Muhammad Mufti Azis, Jonas Kristanto, Sarto. Dynamic simulation of insulin-glucose interaction in type 1 diabetes with MATLAB Simulink®. IOP Conference Series: Materials Science and Engineering. 2020; 778 ():1.

Chicago/Turabian Style

Muhammad Mufti Azis; Jonas Kristanto; Sarto. 2020. "Dynamic simulation of insulin-glucose interaction in type 1 diabetes with MATLAB Simulink®." IOP Conference Series: Materials Science and Engineering 778, no. : 1.

Journal article
Published: 10 March 2016 in Bulletin of Chemical Reaction Engineering & Catalysis
Reads 0
Downloads 0

Exhaust after treatment for lean burn and diesel engine is a complex catalytic system that consists of a number of catalytic units. Pt/Al2O3 is often used as a model Diesel Oxidation Catalyst (DOC) that plays an important role to facilitate oxidation of NO to NO2. In the present study, we proposed a detailed kinetic model of NO oxidation as well as low temperature C3H6 inhibition to simulate temperature-programmed reaction (TPR) data for NO oxidation over Pt/Al2O3. A steady-state microkinetic model based on Langmuir-Hinshelwood mechanism for NO oxidation was proposed. In addition, low temperature C3H6 inhibition was proposed as a result of site blocking as well as surface nitrite consumption. The model can explain the experimental data well over the studied temperature range. Copyright © 2016 BCREC GROUP. All rights reservedReceived: 10th November 2015; Revised: 1st February 2016; Accepted: 1st February 2016How to Cite: Azis, M.M., Creaser, D. (2016). Kinetic Modeling of C3H6 Inhibition on NO Oxidation over Pt Catalyst. Bulletin of Chemical Reaction Engineering & Catalysis, 11 (1): 27-33. (doi:10.9767/bcrec.11.1.403.27-33)Permalink/DOI: http://dx.doi.org/10.9767/bcrec.11.1.403.27-33

ACS Style

Muhammad Mufti Azis; Derek Creaser. Kinetic Modeling of C3H6 Inhibition on NO Oxidation over Pt Catalyst. Bulletin of Chemical Reaction Engineering & Catalysis 2016, 11, 27 -33.

AMA Style

Muhammad Mufti Azis, Derek Creaser. Kinetic Modeling of C3H6 Inhibition on NO Oxidation over Pt Catalyst. Bulletin of Chemical Reaction Engineering & Catalysis. 2016; 11 (1):27-33.

Chicago/Turabian Style

Muhammad Mufti Azis; Derek Creaser. 2016. "Kinetic Modeling of C3H6 Inhibition on NO Oxidation over Pt Catalyst." Bulletin of Chemical Reaction Engineering & Catalysis 11, no. 1: 27-33.