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Controlling unwanted water has been major objective of oil and gas producers. Our theoretical and experimental studies demonstrated that treatment with a preformed particle gel (PPG) of poly(AAm-co-AA) is a successful approach to control unwanted water in oil fields. The swelling capacity of the gels in salt water (formation water) is one of the most crucial criteria in the selection of hydrogel types. In this study an efficient series of gels of acrylamide and acrylic acid, as P(AAm/AA) copolymers, were synthesized by a free radical method. A central-composite Design of Experiments (DOE) approach was employed to design the experiments and to optimize the desired properties of the copolymers. The mole ratio of AAm/AA, mole percentage of the crosslinker agent (N,N'-methylenebisacrylamide, MBA) and swelling time were simultaneously examined as key factors affecting the swelling behavior of the hydrogels. The results showed that these three factors were the dominate factors and were useful for prediction of the swelling process. The predicting model indicated that the optimized ranges of AAm/AA ratio, MBA mole percentage and swelling time, causing the maximum swelling percentage of PPG samples, were 6.77 to 8.54, 9.92 to 11.6% and 170.7 to 179.99 min, respectively. The maximum swelling percentage of the PPG samples was found to be 390% in the optimum ranges of AAm/AA, MBA mole percentage and swelling time. Additionally, it was evident from the results that the predicted results were in good agreement with the experimental data.
Samira Heidari; Feridun Esmaeilzadeh; Dariush Mowla; Sohila Ghasemi. Optimization of Key Parameters Affecting Swelling Capacity of Poly(acrylamide-co-acrylic acid) Hydrogels in Salt Water Using Response Surface Methodology (RSM). Journal of Macromolecular Science, Part B 2021, 1 -18.
AMA StyleSamira Heidari, Feridun Esmaeilzadeh, Dariush Mowla, Sohila Ghasemi. Optimization of Key Parameters Affecting Swelling Capacity of Poly(acrylamide-co-acrylic acid) Hydrogels in Salt Water Using Response Surface Methodology (RSM). Journal of Macromolecular Science, Part B. 2021; ():1-18.
Chicago/Turabian StyleSamira Heidari; Feridun Esmaeilzadeh; Dariush Mowla; Sohila Ghasemi. 2021. "Optimization of Key Parameters Affecting Swelling Capacity of Poly(acrylamide-co-acrylic acid) Hydrogels in Salt Water Using Response Surface Methodology (RSM)." Journal of Macromolecular Science, Part B , no. : 1-18.
The xylene isomerization is a well-established process in the aromatic-based petrochemical complex. This process aims to convert ethylbenzene (EB), meta- and ortho-xylene to para-xylene (PX). Active metal such as platinum (Pt) on the zeolite support is a commonly used catalyst for isomerization reactions. Different catalysts with different acidic strength of zeolite (Si/Al ratios = 32, 50, and 150) are synthesized in this study. The physical and chemical properties of the synthesized catalysts are characterized using X-ray diffraction (XRD), inductively coupled plasma (ICP), and Brunauer, Emmett, and Teller (BET) surface area analyses. Then, the effect of catalyst types and operating parameters such as temperature (370, 375, 380, and 385 °C), hydrogen partial pressure (2.4, 2.6, 2.8, and 3.0), and weight hourly space velocity (3.2, 3.4, 3.8 and 4.1 h−1) investigated on the xylene isomerization process. Indeed, the variation of EB conversion, xylene loss, and the ratio of PX produced to the PX in equilibrium condition (PXATE) by these influential factors is experimentally monitored in a laboratory-scale xylene isomerization reactor. Results show that the catalyst with a small Si/Al ratio of 32 has higher acidic strength and provides the best isomerization performance. Moreover, the temperatures of 375 °C, hydrogen partial pressure (H2/hydrocarbon) of 2.6, and weight hourly space velocity (WHSV) of 3.5 h−1 are the optimum operating conditions for the xylene isomerization process.
Hamid Rajaei; Feridun Esmaeilzadeh; Dariush Mowla. Synthesis and Characterization of Nano-Sized Pt/HZSM–5 Catalyst for Application in the Xylene Isomerization Process. Catalysis Letters 2021, 1 -12.
AMA StyleHamid Rajaei, Feridun Esmaeilzadeh, Dariush Mowla. Synthesis and Characterization of Nano-Sized Pt/HZSM–5 Catalyst for Application in the Xylene Isomerization Process. Catalysis Letters. 2021; ():1-12.
Chicago/Turabian StyleHamid Rajaei; Feridun Esmaeilzadeh; Dariush Mowla. 2021. "Synthesis and Characterization of Nano-Sized Pt/HZSM–5 Catalyst for Application in the Xylene Isomerization Process." Catalysis Letters , no. : 1-12.
Marziyeh Fauzi; Feridun Esmaeilzadeh; Dariush Mowla; Neda Sahraeian. The effect of various capping agents on V2O5 morphology and photocatalytic degradation of dye. Journal of Materials Science: Materials in Electronics 2021, 32, 10473 -10490.
AMA StyleMarziyeh Fauzi, Feridun Esmaeilzadeh, Dariush Mowla, Neda Sahraeian. The effect of various capping agents on V2O5 morphology and photocatalytic degradation of dye. Journal of Materials Science: Materials in Electronics. 2021; 32 (8):10473-10490.
Chicago/Turabian StyleMarziyeh Fauzi; Feridun Esmaeilzadeh; Dariush Mowla; Neda Sahraeian. 2021. "The effect of various capping agents on V2O5 morphology and photocatalytic degradation of dye." Journal of Materials Science: Materials in Electronics 32, no. 8: 10473-10490.
It is well established that pretreatment of lignocellulosic biomass is required to achieve an effective enzymatic saccharification process. At the present time, most of the touted pre-treatment technologies would cause environmental pollution and unsustainable water use for the pretreated material prior to enzymatic saccharification. To address these shortcomings, the pretreatment technology which combines the supercritical CO2, SC-CO2 (a green solvent), acetic acid, and steam explosion was used to assess the pretreatment of wheat straw for enzymatic saccharification. The effects of solvent concentration, impregnation temperature and time, pre-treatment time, and temperature, as well as SC-CO2 pressure, contact time, and temperature, were evaluated. The results identified that at the optimum SC-CO2 pressure of 18 MPa, the highest amount of reducing sugars (RS) was produced from the cellulosic pulp using Acetic acid/Steam/SC-CO2 at 200 °C for 30 min, a value 20% more than the pulp produced with the Water/Steam/SC-CO2. The effectiveness of the pretreatment process was attributed not only to delignification and defibrillation but also to the exposure of the cellulose structure evidenced from the proportion of the β-glycosidic linkages as shown by FTIR. Passing SC-CO2 after the pretreatment reduces the amounts of fermentation inhibitors and eliminates the use of wash water.
Samyar Zabihi; Amir Sharafi; Hossein Motamedi; Feridun Esmaeilzadeh; William O. S. Doherty. Environmentally friendly acetic acid/steam explosion/supercritical carbon dioxide system for the pre-treatment of wheat straw. Environmental Science and Pollution Research 2021, 1 -15.
AMA StyleSamyar Zabihi, Amir Sharafi, Hossein Motamedi, Feridun Esmaeilzadeh, William O. S. Doherty. Environmentally friendly acetic acid/steam explosion/supercritical carbon dioxide system for the pre-treatment of wheat straw. Environmental Science and Pollution Research. 2021; ():1-15.
Chicago/Turabian StyleSamyar Zabihi; Amir Sharafi; Hossein Motamedi; Feridun Esmaeilzadeh; William O. S. Doherty. 2021. "Environmentally friendly acetic acid/steam explosion/supercritical carbon dioxide system for the pre-treatment of wheat straw." Environmental Science and Pollution Research , no. : 1-15.
Chemical recovery techniques have always been considered as one of the efficient secondary and tertiary recovery methods to enhance the oil recovery factor. Regarding the diversity of reservoir heterogeneity and rock properties for each field, various chemical agents were taken into consideration to provide a feasible process that has the best agreement with the reservoir characterization. The objective of this paper is to investigate the considerable influence of a set of chemical agents and temperature impact on the surfactant adsorption density of carbonate rocks. According to the results of this experiment, higher temperatures provide lower surfactant adsorption density. The lowest adsorption carbonate rocks’ adsorption density had occurred at 80°C. Furthermore, it was witnessed that hydrolyzed polyacrylamide addition to the surfactant would cause a dramatic decrease in the adsorption density in comparison with the surfactant or polymer individually.
Hamid Esfandyari; Abdorrahman Moghani; Feridun Esmaeilzadeh; Afshin Davarpanah. A Laboratory Approach to Measure Carbonate Rocks’ Adsorption Density by Surfactant and Polymer. Mathematical Problems in Engineering 2021, 2021, 1 -7.
AMA StyleHamid Esfandyari, Abdorrahman Moghani, Feridun Esmaeilzadeh, Afshin Davarpanah. A Laboratory Approach to Measure Carbonate Rocks’ Adsorption Density by Surfactant and Polymer. Mathematical Problems in Engineering. 2021; 2021 ():1-7.
Chicago/Turabian StyleHamid Esfandyari; Abdorrahman Moghani; Feridun Esmaeilzadeh; Afshin Davarpanah. 2021. "A Laboratory Approach to Measure Carbonate Rocks’ Adsorption Density by Surfactant and Polymer." Mathematical Problems in Engineering 2021, no. : 1-7.
This study focused on the application of robust and promising Chlorella vulgaris for the simultaneous nutrient and CO2 removal, followed by examining biofuel production to overcome the existing drawbacks, including the burden of costs arising from current methodologies. The effects of operational parameters such as different CO2 concentrations (from 0.04 to 20% v/v) of the flue gas and wastewater C/N ratios (from 4 to 16) were examined on biomass production, culture pH, nutrients removal, CO2 capture, fatty acids content and biodiesel properties. The results showed that the C. vulgaris applicability depended directly on the microalgae growth rate and the highest growth was obtained at 5% (v/v) CO2 concentration with the C/N ratio of 4. C. vulgaris showed higher capability for ammonium removal(more than 99 %) compared to nitrate (81.05 %) and phosphate (87.95 %) removal, which was due to the fact that C. vulgaris prefered ammonium as a primary source of nitrogen. The gas-phase CO2 removal and CO2 fixation rate in the remaining biomass were found to be 76.92 % and 0.318 ± 0.009 (g L−1 d-1), respectively. Moreover, the biodiesel contained fatty acids with C16–C18 composition, which was determined as the main components of the applied microalgae and the results also revealed a beneficial approach to produce qualified biodiesel with high cetane number.
Seyedeh Zeinab Ayatollahi; Fereidun Esmaeilzadeh; Dariush Mowla. Integrated CO2 capture, nutrients removal and biodiesel production using Chlorella vulgaris. Journal of Environmental Chemical Engineering 2020, 9, 104763 .
AMA StyleSeyedeh Zeinab Ayatollahi, Fereidun Esmaeilzadeh, Dariush Mowla. Integrated CO2 capture, nutrients removal and biodiesel production using Chlorella vulgaris. Journal of Environmental Chemical Engineering. 2020; 9 (2):104763.
Chicago/Turabian StyleSeyedeh Zeinab Ayatollahi; Fereidun Esmaeilzadeh; Dariush Mowla. 2020. "Integrated CO2 capture, nutrients removal and biodiesel production using Chlorella vulgaris." Journal of Environmental Chemical Engineering 9, no. 2: 104763.
In recent decades, chemical surfactants have significantly been utilized in enhanced oil recovery (EOR) process and researchers still have a distinctive look to applications of these chemicals. In this study, Hexadecyl-tetra Methyl Ammonium Bromide (henceforth; HTMAB) and Hexadecyl-Amino-Benzene Sulfonic Acid (henceforth; HABSA) were used as surfactants to drive relative permeability curves in carbonate rocks. To this end, the contact angle between different concentrations of two surfactant solutions was measured in the bulk volume of kerosene using a VIT-6000 apparatus. Additionally, the unsteady state core flooding process (JBN method) in three steps (water injection, surfactant HTMAB injection and surfactant HABSA injection) was utilized to analyze the relative permeability measurements and finally oil recovery was evaluated at different conditions. According to the results of this study, HTMAB has the maximum oil recovery factor of 63.50% among the other scenarios assessed in this work. Hence, it is concluded that in carbonate rocks, HTMAB is more effective than HABSA as it has better efficiency to modify the wettability toward water-wet. Furthermore, for HTMAB flooding, it is indicated that relative permeability curves intersection depicts the water saturation of 0.67and according to the outcomes; the end-point of water is less than oil in relative permeability curve. Therefore, it can be concluded that HTMAB is more impressive than HABSA in wettability variation of these sorts of rocks.
Hamid Esfandyari; Abdolrahman Moghani Rahimi; Feridun Esmaeilzadeh; Afshin Davarpanah; Amir H. Mohammadi. Amphoteric and cationic surfactants for enhancing oil recovery from carbonate oil reservoirs. Journal of Molecular Liquids 2020, 322, 114518 .
AMA StyleHamid Esfandyari, Abdolrahman Moghani Rahimi, Feridun Esmaeilzadeh, Afshin Davarpanah, Amir H. Mohammadi. Amphoteric and cationic surfactants for enhancing oil recovery from carbonate oil reservoirs. Journal of Molecular Liquids. 2020; 322 ():114518.
Chicago/Turabian StyleHamid Esfandyari; Abdolrahman Moghani Rahimi; Feridun Esmaeilzadeh; Afshin Davarpanah; Amir H. Mohammadi. 2020. "Amphoteric and cationic surfactants for enhancing oil recovery from carbonate oil reservoirs." Journal of Molecular Liquids 322, no. : 114518.
The compressive strength, permeability, porosity and Young's modulus are the most important parameters affecting on the consolation of oil wells rocks. The correct prediction of these parameters depends on the type and concentration of chemical substances in them. Therefore, modeling and optimization of these parameters on the basis of the amount and concentration of chemicals (resins) are important for reducing the production of sand along with hydrocarbon fluids to the highest possible extent. In this research work, the individual and interactive effects of the amount and concentration of chemical substances were studied on compressive strength, permeability, porosity and Young's modulus for the epoxy and furan sand consolidated systems. The experimental design and optimization of the parameters were performed according to Design Expert software. The proposed models can be used to predict the above mentioned parameters in the specified ranges with an error of less than 10%. Also, the models could be employed as an optimization tool for designing epoxy and furan sand consolidation operations in the oil and gas industries. The samples made under optimum conditions with both resins have approximately mechanical strength four times higher than the limit critical sand production. The samples permeability was about 2000 md for epoxy resin and 7500 md for the furan resin at optimum conditions. On the other hand, the Young's modulus of the sample made with epoxy resin was 20% less than the furan resin sample, which showed that the resistance of the epoxy resin sample is higher than that of the furan resin against stress changes. Finally, the accuracy of the optimization and modeling of experimental data were studied through both statistical and experimental data. The accuracy of the modeling and optimization was evident in both methods.
Mohammad Nabi Tabbakhzadeh; Feridun Esmaeilzadeh; Reza Zabihi; Dariush Mowla. Experimental study of chemical sand consolidation using epoxy and furan resins for oil wells: Experimental design models. International Journal of Rock Mechanics and Mining Sciences 2020, 135, 104486 .
AMA StyleMohammad Nabi Tabbakhzadeh, Feridun Esmaeilzadeh, Reza Zabihi, Dariush Mowla. Experimental study of chemical sand consolidation using epoxy and furan resins for oil wells: Experimental design models. International Journal of Rock Mechanics and Mining Sciences. 2020; 135 ():104486.
Chicago/Turabian StyleMohammad Nabi Tabbakhzadeh; Feridun Esmaeilzadeh; Reza Zabihi; Dariush Mowla. 2020. "Experimental study of chemical sand consolidation using epoxy and furan resins for oil wells: Experimental design models." International Journal of Rock Mechanics and Mining Sciences 135, no. : 104486.
Wettability alteration (Δθ), changes in interfacial tension (ΔIFT) and fluid pH are investigated for Asmari formation carbonate and sandstone reservoirs of the large Ahwaz oil field (Iran) with a range of low salinity water-based fluids accompanied by a non-ionic surfactant (LSWF-surfactant) and the acidic (total acidic number = 0.58 mg KOH g−1) Asmari crude oil. On initial contact with the LSWF-surfactant the carefully prepared reservoir rock slices, soaked and aged in the crude oil all displayed oil-wet states. Metal-salt (potassium chloride, sodium sulfate, magnesium sulfate heptahydrate, calcium chloride dihydrate and lithium chloride) enriched aqueous solutions of various concentration (1000–4000 ppm) mixed with 400 ppm Triton™ X-100 (surfactant) were used in the Δθ, ΔIFT and pH tests. The test results for these variables suggest that the calcium chloride dihydrate (4000 ppm) solution with surfactant has the most beneficial impacts on both the carbonate and sandstone reservoir samples evaluated in terms of improving oil mobilization. Glass micro-model fluid-flow experiments to evaluate and compare oil recovered by secondary recovery (LSWF only injected) and by tertiary recovery (LSWF-surfactant injection) confirm the rock slice tests, with calcium chloride dihydrate achieving substantially higher ultimate oil recovery than the other LSWF solutions tested.
Mina Samiei Nezhad; David A. Wood; Erfan Sadatshojaei; Feridun Esmaeilzadeh. New insight to experimental study of ionic solutions with a non-ionic surfactant on wettability, interfacial tension and micro-model flooding. Fuel 2020, 285, 119126 .
AMA StyleMina Samiei Nezhad, David A. Wood, Erfan Sadatshojaei, Feridun Esmaeilzadeh. New insight to experimental study of ionic solutions with a non-ionic surfactant on wettability, interfacial tension and micro-model flooding. Fuel. 2020; 285 ():119126.
Chicago/Turabian StyleMina Samiei Nezhad; David A. Wood; Erfan Sadatshojaei; Feridun Esmaeilzadeh. 2020. "New insight to experimental study of ionic solutions with a non-ionic surfactant on wettability, interfacial tension and micro-model flooding." Fuel 285, no. : 119126.
Biodiesel production from microalgae is viable but faces scale-up challenges. The main drawbacks in the industrial production of biodiesel are high-water content in the biomass (~80%) and the numbers of process stages involved in its production. Using direct transesterification is taken into account to be a good solution; because lipid-extraction and transesterification processes are completed in one step. This converts wet biomass directly into biodiesel. This study evaluates a single-step, environmentally-friendly method that directly converts wet microalgae into biodiesel directly with the involvement of supercritical carbon dioxide. Carbon dioxide is exploited in a supercritical state to simultaneously extract lipids from algal biomass impregnated with 15 cc ethanol per 1 g dry microalgal and transesterify that extract to generate fatty-acid-ethyl esters. Wet microalgal biomass of Nannochloropsis oculata was used as the biomass feed for this process. Its biodiesel production efficiency is impacted by temperature and water content. Water has a negative effect on productivity at temperatures <150 °C. On the other hand, at temperatures of ~150 °C, biodiesel productivity was not negatively influenced despite high water content. These results suggest that by increasing process temperature, biodiesel can be produced efficaciously from wet microalgae, thereby reducing its production costs.
Ahmad Jafari; Feridun Esmaeilzadeh; Dariush Mowla; Erfan Sadatshojaei; Setareh Heidari; David A. Wood. New insights to direct conversion of wet microalgae impregnated with ethanol to biodiesel exploiting extraction with supercritical carbon dioxide. Fuel 2020, 285, 119199 .
AMA StyleAhmad Jafari, Feridun Esmaeilzadeh, Dariush Mowla, Erfan Sadatshojaei, Setareh Heidari, David A. Wood. New insights to direct conversion of wet microalgae impregnated with ethanol to biodiesel exploiting extraction with supercritical carbon dioxide. Fuel. 2020; 285 ():119199.
Chicago/Turabian StyleAhmad Jafari; Feridun Esmaeilzadeh; Dariush Mowla; Erfan Sadatshojaei; Setareh Heidari; David A. Wood. 2020. "New insights to direct conversion of wet microalgae impregnated with ethanol to biodiesel exploiting extraction with supercritical carbon dioxide." Fuel 285, no. : 119199.
Vanadium pentoxide (V2O5) nanospheres were synthesized hydrothermally for the first time with high specific surface area. The effect of different parameters including pH level, H2O2/H2O volume ratio and reaction temperature on the precipitate yield was investigated, and the highest yield was attained at the pH level of 3, H2O2/H2O volume ratio of 0.01 and the reaction temperature of 160 °C. Freeze drying, oven drying and vacuum drying methods along with auxiliary processes were employed to improve the drying process and minimize the aggregation of the synthesized nanoparticles (NPs). Two auxiliary processes were used prior to drying in the oven to improve the performance of drying. Firstly, precipitates were immersed in ethanol to get replaced in place of water molecules in a week. The precipitates were then dried at room temperature for a week to evaporate their moisture. In vacuum drying method, only the second auxiliary process was employed. In freeze drying technique, the segregate and uniform nanospheres of V2O5 were produced with an average diameter of 37 nm. Generally, the employed additional treatments cause the drying techniques to enhance and the extent of particles aggregation to reduce. Finally, the application of the synthesized NPs as catalyst was investigated for the elimination of H2S from sour water with the initial concentration of 1300 ppm. The sour water was provided from Shiraz Oil Refinery Company. Results revealed that the synthesized NPs enable to completely eliminate hydrogen sulfide from sour water with 20% greater conversion at early contact seconds as compared to commercial V2O5 powder.
Neda Sahraeian; Feridun Esmaeilzadeh; Dariush Mowla. Hydrothermal synthesis of V2O5 nanospheres as catalyst for hydrogen sulfide removal from sour water. Ceramics International 2020, 47, 923 -934.
AMA StyleNeda Sahraeian, Feridun Esmaeilzadeh, Dariush Mowla. Hydrothermal synthesis of V2O5 nanospheres as catalyst for hydrogen sulfide removal from sour water. Ceramics International. 2020; 47 (1):923-934.
Chicago/Turabian StyleNeda Sahraeian; Feridun Esmaeilzadeh; Dariush Mowla. 2020. "Hydrothermal synthesis of V2O5 nanospheres as catalyst for hydrogen sulfide removal from sour water." Ceramics International 47, no. 1: 923-934.
Encouraged by the wide spectrum of novel applications of gas hydrates, e.g., energy recovery, gas separation, gas storage, gas transportation, water desalination, and hydrogen hydrate as a green energy resource, as well as CO2 capturing, many scientists have focused their attention on investigating this important phenomenon. Of course, from an engineering viewpoint, the mathematical modeling of gas hydrates is of paramount importance, as anticipation of gas hydrate stability conditions is effective in the design and control of industrial processes. Overall, the thermodynamic modeling of gas hydrate can be tackled as an equilibration of three phases, i.e., liquid, gas, and solid hydrate. The inseparable component in all hydrate systems, water, is highly polar and non-ideal, necessitating the use of more advanced equation of states (EoSs) that take into account more intermolecular forces for thermodynamic modeling of these systems. Motivated by the ever-increasing number of publications on this topic, this study aims to review the application of associating EoSs for the thermodynamic modeling of gas hydrates. Three most important hydrate-based models available in the literature including the van der Waals–Platteeuw (vdW–P) model, Chen–Guo model, and Klauda–Sandler model coupled with CPA and SAFT EoSs were investigated and compared with cubic EoSs. It was concluded that the CPA and SAFT EoSs gave very accurate results for hydrate systems as they take into account the association interactions, which are very crucial in gas hydrate systems in which water, methanol, glycols, and other types of associating compounds are available. Moreover, it was concluded that the CPA EoS is easier to use than the SAFT-type EoSs and our suggestion for the gas hydrate systems is the CPA EoS.
Feridun Esmaeilzadeh; Nazanin Hamedi; Dornaz Karimipourfard; Ali Rasoolzadeh. An insight into the role of the association equations of states in gas hydrate modeling: a review. Petroleum Science 2020, 17, 1432 -1450.
AMA StyleFeridun Esmaeilzadeh, Nazanin Hamedi, Dornaz Karimipourfard, Ali Rasoolzadeh. An insight into the role of the association equations of states in gas hydrate modeling: a review. Petroleum Science. 2020; 17 (5):1432-1450.
Chicago/Turabian StyleFeridun Esmaeilzadeh; Nazanin Hamedi; Dornaz Karimipourfard; Ali Rasoolzadeh. 2020. "An insight into the role of the association equations of states in gas hydrate modeling: a review." Petroleum Science 17, no. 5: 1432-1450.
The aluminosilicate structure of zeolites plays a decisive role in catalytic activity of HZSM-5 scaffolds leading to form exclusive features in the simultaneous reactions of xylene isomerization and ethylbenzene conversion. The aim of this work is to elucidate the effect of Si/Al ratio (150, 50 and 32) on the Si–O(H)–Al angle of Brønsted sites, which impresses the bond-length, activation energy, acidity strength of O–H Brønsted acid sites, specific surface area and porosity. To achieve these goals, BET test and the ammonia-TPD profiles of HZSM-5 zeolites possessing different Si/Al ratios were obtained and interpreted. The results of BET test show that the Si/Al ratio of 50 in comparing with the other ratios assessed in this work has the most specific surface area and porosity. Moreover, the results of NH3-TPD experiment revealed that a temperature shift of H-peak signals to higher temperatures occurs with decreasing the Si/Al ratio because of raising the enthalpy of Brønsted sites and increasing the acidity strength. The ammonia-TPD profiles in accordance with the deprotonation enthalpy theory highlighted the effect of Si/Al ratio on the angle of Brønsted sites resulting in increasing the length of O–H moiety or the acidity strength of Brønsted sites.
Hamid Rajaei; Feridun Esmaeilzadeh; Dariush Mowla. Elucidation of Si/Al ratio on physicochemical properties of HZSM-5 zeolites. Journal of Thermal Analysis and Calorimetry 2020, 1 -6.
AMA StyleHamid Rajaei, Feridun Esmaeilzadeh, Dariush Mowla. Elucidation of Si/Al ratio on physicochemical properties of HZSM-5 zeolites. Journal of Thermal Analysis and Calorimetry. 2020; ():1-6.
Chicago/Turabian StyleHamid Rajaei; Feridun Esmaeilzadeh; Dariush Mowla. 2020. "Elucidation of Si/Al ratio on physicochemical properties of HZSM-5 zeolites." Journal of Thermal Analysis and Calorimetry , no. : 1-6.
In the current investigation, the solubility of fenoprofen as a nonsteroidal anti-inflammatory drug in supercritical CO2 (SC-CO2) is measured by employing a motorized PVT (pressure–volume–temperature) equilibrium cell. The solubility measurements were carried out in temperatures between 308 and 338 K and pressures between 12 and 40 MPa. The measured data reveals that the solubility of fenoprofen (mole fraction) lies between 2.01 × 10–5 and 4.20 × 10–3, depending on the thermodynamic conditions. Besides the experimental measurement of fenoprofen solubility, thermodynamic modeling of solubility using five different density-based semi-empirical correlations was carried out. The models were considered with only three fitting parameters, namely, Mendez-Santiago and Teja (MST), Bartle et al., Kumar and Johnston (K–J), Chrastil, and Garlapati and Madras models. The results revealed that among the examined models, the Bartle et al. model was the most accurate one with the lowest average absolute relative deviation percent (AARD %) of 6.58% for the studied drug, while the K–J model leads to poor prediction with an AARD % of 9.60%.
Samyar Zabihi; Yaghoub Rahnama; Amir Sharafi; Fatemeh Borousan; Ali Zeinolabedini Hezave; Saeed Shirazian. Experimental Solubility Measurements of Fenoprofen in Supercritical Carbon Dioxide. Journal of Chemical & Engineering Data 2020, 65, 1425 -1434.
AMA StyleSamyar Zabihi, Yaghoub Rahnama, Amir Sharafi, Fatemeh Borousan, Ali Zeinolabedini Hezave, Saeed Shirazian. Experimental Solubility Measurements of Fenoprofen in Supercritical Carbon Dioxide. Journal of Chemical & Engineering Data. 2020; 65 (4):1425-1434.
Chicago/Turabian StyleSamyar Zabihi; Yaghoub Rahnama; Amir Sharafi; Fatemeh Borousan; Ali Zeinolabedini Hezave; Saeed Shirazian. 2020. "Experimental Solubility Measurements of Fenoprofen in Supercritical Carbon Dioxide." Journal of Chemical & Engineering Data 65, no. 4: 1425-1434.
Application of nanoparticles in aqueous base-fluids for intensification of absorption rate is an efficient method for absorption progress within the system incorporating bubble-liquid process. In this research, SO2 and CO2 were separately injected as single raising bubbles containing nanofluids to study the impact of nanoparticle effects on acidic gases absorption. In order to do this, comprehensive experimental studies were done. These works also tried to investigate the effect of different nanofluids such as water/Al2O3 or water/Fe2O3 or water/SiO2 on the absorption rate. The results showed that the absorption of CO2 and SO2 in nanofluids significantly increases up to 77 percent in comparison with base fluid. It was also observed that the type of gas molecules and nanoparticles determine the mechanism of mass transfer enhancement by nanofluids. Additionally, our findings indicated that the values of mass transfer coefficient of SO2 in water/Al2O3, water/Fe2O3 and water/SiO2 nanofluids are, respectively, 50%, 42% and 71% more than those of SO2 in pure water (kLSO2-water=1.45×10-4 m/s). Moreover, the values for CO2 in above nanofluids were, respectively, 117%, 103% and 88% more than those of CO2 in water alone (kLCO2-water=1.03×10-4 m/s). Finally, this study tries to offer a new comprehensive correlation for mass transfer coefficient and absorption rate prediction.
Soroush Karamian; Dariush Mowla; Feridun Esmaeilzadeh. The Effect of Various Nanofluids on Absorption Intensification of CO2/SO2 in a Single-Bubble Column. Processes 2019, 7, 393 .
AMA StyleSoroush Karamian, Dariush Mowla, Feridun Esmaeilzadeh. The Effect of Various Nanofluids on Absorption Intensification of CO2/SO2 in a Single-Bubble Column. Processes. 2019; 7 (7):393.
Chicago/Turabian StyleSoroush Karamian; Dariush Mowla; Feridun Esmaeilzadeh. 2019. "The Effect of Various Nanofluids on Absorption Intensification of CO2/SO2 in a Single-Bubble Column." Processes 7, no. 7: 393.
Capillary and interfacial forces are of great influences of trapping hydrocarbon in porous media after primary and secondary recovery processes. The trapped crude oil in the reservoir can be mobilized and produced by reducing these forces. Thus, surfactant flooding, as a main enhanced oil recovery (EOR) method, is usually applied to reduce the interfacial tension (IFT) of crude oil–water system in porous medium and improves the oil recovery. This study focused on the effect of [C8Py][Cl] and [C18Py][Cl] ionic liquids (ILs), as a new family of surfactant, in combination with various salts including sodium chloride, potassium chloride, magnesium sulfate and potassium sulfate on IFT reduction. EOR injection solutions were prepared from mixing the ILs at different concentrations of 100, 250, 500 and 1000 ppm with the salts ranging from 500 to 80,000 ppm. Obtained results showed that the minimum IFT value from both ILs was achieved when the concentration of the ILs was about 1000 g/mL, and the concentrations of KCl, K2SO4, MgSO4 and NaCl were 1000, 2000, 500 and 80,000 ppm, respectively. The minimum IFTs were achieved when NaCl and ILs concentrations were the maximum and MgSO4 concentration was the minimum.
Siamak Najimi; Iman Nowrouzi; Abbas Khaksar Manshad; Mehdi Hojjat Farsangi; Ali Zeinolabedini Hezave; Jagar Ali; Alireza Keshavarz; Amir H Mohammadi. Investigating the effect of [C8Py][Cl] and [C18Py][Cl] ionic liquids on the water/oil interfacial tension by considering Taguchi method. Journal of Petroleum Exploration and Production Technology 2019, 9, 2933 -2941.
AMA StyleSiamak Najimi, Iman Nowrouzi, Abbas Khaksar Manshad, Mehdi Hojjat Farsangi, Ali Zeinolabedini Hezave, Jagar Ali, Alireza Keshavarz, Amir H Mohammadi. Investigating the effect of [C8Py][Cl] and [C18Py][Cl] ionic liquids on the water/oil interfacial tension by considering Taguchi method. Journal of Petroleum Exploration and Production Technology. 2019; 9 (4):2933-2941.
Chicago/Turabian StyleSiamak Najimi; Iman Nowrouzi; Abbas Khaksar Manshad; Mehdi Hojjat Farsangi; Ali Zeinolabedini Hezave; Jagar Ali; Alireza Keshavarz; Amir H Mohammadi. 2019. "Investigating the effect of [C8Py][Cl] and [C18Py][Cl] ionic liquids on the water/oil interfacial tension by considering Taguchi method." Journal of Petroleum Exploration and Production Technology 9, no. 4: 2933-2941.
Equations of state are vital tools for the calculation of gases and liquids properties. One of the most important EoSs is Virial EoS. One unique property of Viral EoS is that its coefficients, which are calculated from potential functions, are related to intermolecular forces. In this paper, Kihara potential function is improved based on molecular structure, and all coefficients are determined by optimization based on second Virial coefficient calculated from PVT data. A new parameter is introduced in this model which is representing the effective molecular diameter of molecules which is comparable with the calculated dimensions of molecules. The second Virial coefficient of 53 polar and non-polar molecules are calculated with the proposed potential function and classified into 5 groups based on the molecular structure. 1067 experimental data points of hydrocarbons including n-alkanes, alkenes, alcohols, chlorofluorocarbons (CFCs), hydrofluorocarbons (HFCs), Hydrochlorofluorocarbons (HCFCs), Trichloromethane, Dichloromethane, Chloromethane, 1,1,1-Trichloroethane, 1-Chlorobutane, branched alkanes, benzene, toluene, water and carbon dioxide were exploited. 610 experimental data points of the aforementioned substances were used to obtain the new model's coefficients, and the remaining data points were implemented to validate the proposed model. Additionally, the accuracy of the proposed model is compared with the other models such as Kihara, Exp-6, square-well, L-J and Stockmayer that the results reveal an enhanced accuracy. The total average absolute deviations for non-polar substances based on the proposed model, Kihara, Exp-6, square-well and L-J are 2.57, 3.14, 3.57, 2.90 and 7.85%, respectively. For polar substances, the total average absolute relative deviations based on the proposed model and Stockmayer are 3.95 and 6.69%, respectively. Also, Z compressibility factor, molar heat capacity and density of some polar and non-polar substances including water, methane, ethane, carbon dioxide, 1-butanol and 1,1,1,2-tetrafluoroethane are calculated to validate the proposed model, and the results showed that this model has good accuracy for calculation of the aforementioned properties in different temperature and pressure ranges.
Hamed Peyrovedin; Feridun Esmaeilzadeh; Mojtaba Binazadeh. Calculation of the second virial coefficient and molecular radius of polar and non-polar substances using a new potential function. Fluid Phase Equilibria 2019, 492, 88 -100.
AMA StyleHamed Peyrovedin, Feridun Esmaeilzadeh, Mojtaba Binazadeh. Calculation of the second virial coefficient and molecular radius of polar and non-polar substances using a new potential function. Fluid Phase Equilibria. 2019; 492 ():88-100.
Chicago/Turabian StyleHamed Peyrovedin; Feridun Esmaeilzadeh; Mojtaba Binazadeh. 2019. "Calculation of the second virial coefficient and molecular radius of polar and non-polar substances using a new potential function." Fluid Phase Equilibria 492, no. : 88-100.
Sulfate is considered to be one of the most significant chemical pollutants of industrial wastewater. The removal of sulfate ions from effluents is a complicated problem because of their high solubility and stability in aqueous solutions. The biological method using microalgae is recognized as an efficient procedure in wastewater treatment. In this study, indigenous microalgae were utilized in the stage-wise operation for the elimination of sulfate ions from Fars combined-cycle power plant effluent (5636.66 mg/L concentration of sulfate ions). To do so, indigenous microalgae were isolated and identified from the effluent. Indigenous microalgae (106 cells/mL) were then inoculated to the effluent for 21 days. During cultivation in the stage-wise operation, five inoculations were fulfilled, and each inoculation lasted for five days. The optical density and sulfate concentration were measured on the first and fifth days of each inoculation. The results showed that the isolated microalgae (Dictyosphaerium sp. strain MM-IR2) could grow in a power-plant wastewater and reduce sulfate ions from the effluent. Also, it was found that the cultivation of Dictyosphaerium sp. strain MM-IR2 in the stage-wise operation increased the sulfate ions removal efficiency from the examined wastewater. Accordingly, the percentage of sulfate ions removal from the power-plant effluent was found to be 37.29 %. Finally, the results revealed that the application of biological method using indigenous microalgae in the stage-wise operation can be a promising solution for the enhancement of sulfate ions elimination efficiency.
Masoumeh Mohammadi; Dariush Mowla; Feridun Esmaeilzadeh; Younes Ghasemi. Enhancement of sulfate removal from the power plant wastewater using cultivation of indigenous microalgae: Stage-wise operation. Journal of Environmental Chemical Engineering 2019, 7, 102870 .
AMA StyleMasoumeh Mohammadi, Dariush Mowla, Feridun Esmaeilzadeh, Younes Ghasemi. Enhancement of sulfate removal from the power plant wastewater using cultivation of indigenous microalgae: Stage-wise operation. Journal of Environmental Chemical Engineering. 2019; 7 (1):102870.
Chicago/Turabian StyleMasoumeh Mohammadi; Dariush Mowla; Feridun Esmaeilzadeh; Younes Ghasemi. 2019. "Enhancement of sulfate removal from the power plant wastewater using cultivation of indigenous microalgae: Stage-wise operation." Journal of Environmental Chemical Engineering 7, no. 1: 102870.
In this study, the effect of NaCl, KCl, CaCl2, MgCl2, MgSO4, and CaCl2 salts in brine in the range of low (1000−5000 ppm) and intermediate (5000−40 000 ppm) salinity water on the amount and offset pressure of asphaltene precipitation was investigated. The measurements were performed at reservoir temperature (350.15 K) and high pressures (0−100 bar). The IFT (Interfacial Tension) values increased with pressure and a sudden increase was observed at a specific pressure namely, an offset pressure of asphaltene precipitation in APE (Asphaltene Precipitation Envelope). For all brines, the amount of IFT with increasing concentration was in descending order and after a minimum value it changed to uptrend. Likewise, similar results were obtained for the precipitated asphaltene amount. All the brines intensified the asphaltene precipitation. Monovalent cations like Na+ and K+ showed higher values of IFT and hence more asphaltene precipitation, however, MgCl2 showed the least IFT, offset pressure and the amount of asphaltene precipitation.
Abolhasan Ameri; Feridun Esmaeilzadeh; Dariush Mowla. Effect of Brine on Asphaltene Precipitation at High Pressures in Oil Reservoirs. Petroleum Chemistry 2019, 59, 57 -65.
AMA StyleAbolhasan Ameri, Feridun Esmaeilzadeh, Dariush Mowla. Effect of Brine on Asphaltene Precipitation at High Pressures in Oil Reservoirs. Petroleum Chemistry. 2019; 59 (1):57-65.
Chicago/Turabian StyleAbolhasan Ameri; Feridun Esmaeilzadeh; Dariush Mowla. 2019. "Effect of Brine on Asphaltene Precipitation at High Pressures in Oil Reservoirs." Petroleum Chemistry 59, no. 1: 57-65.
In this study, the effect of NaCl, KCl, CaCl2, MgCl2, MgSO4, and CaCl2 salts in brine in the range of low (1000−5000 ppm) and intermediate (5000−40 000 ppm) salinity water on the amount and offset pressure of asphaltene precipitation was investigated. The measurements were performed at reservoir temperature (350.15 K) and high pressures (0−100 bar). The IFT (Interfacial Tension) values increased with pressure and a sudden increase was observed at a specific pressure namely, an offset pressure of asphaltene precipitation in APE (Asphaltene Precipitation Envelope). For all brines, the amount of IFT with increasing concentration was in descending order and after a minimum value it changed to uptrend. Likewise, similar results were obtained for the precipitated asphaltene amount. All the brines intensified the asphaltene precipitation. Monovalent cations like Na+ and K+ showed higher values of IFT and hence more asphaltene precipitation, however, MgCl2 showed the least IFT, offset pressure and the amount of asphaltene precipitation.
Abolhasan Ameri; Feridun Esmaeilzadeh; Dariush Mowla. Effect of Brine on Asphaltene Precipitation at High Pressures in Oil Reservoirs. Petroleum Chemistry 2018, 58, 1076 -1084.
AMA StyleAbolhasan Ameri, Feridun Esmaeilzadeh, Dariush Mowla. Effect of Brine on Asphaltene Precipitation at High Pressures in Oil Reservoirs. Petroleum Chemistry. 2018; 58 (12):1076-1084.
Chicago/Turabian StyleAbolhasan Ameri; Feridun Esmaeilzadeh; Dariush Mowla. 2018. "Effect of Brine on Asphaltene Precipitation at High Pressures in Oil Reservoirs." Petroleum Chemistry 58, no. 12: 1076-1084.