Article
Agricultural Engineering
Yashvir Singh, Abhishek Sharma, Nishant Kumar Singh
Summary: Supercritical methanol transesterification is an effective method for processing biodiesel, which can produce a substantial amount of biodiesel in a short period of time and solve the problems associated with catalyst processing. The study found that the reaction temperature, methanol to oil ratio, reaction time, and pressure have a significant impact on the biodiesel production in the supercritical methanol transesterification process.
BIOMASS & BIOENERGY
(2022)
Article
Energy & Fuels
Parvesh Kumar, Naveen Kumar
Summary: Biodiesel is considered an effective alternative to petroleum diesel, but its production process is time and energy consuming. By using optimization tools like Response Surface Methodology (RSM), the number of experiments can be reduced and the yield can be increased.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2021)
Article
Energy & Fuels
M. A. Sundaramahalingam, S. Karthikumar, R. Shyam Kumar, Karl J. Samuel, S. Shajahan, V. Sivasubramanian, P. Sivashanmugam, P. Varalakshmi, Asad Syed, Najat Marraiki, Abdallah M. Elgorban, R. Vinoth Kumar, I. Ganesh Moorthy
Summary: In this study, Annona squamosa seed oil was extracted and converted into fatty acid methyl esters using ultrasound-assisted extraction and transesterification methods. The optimized models showed significant results at a 95% confidence level, highlighting the potential of this rapid and simple process for biodiesel production. The experimental data supported the high yields and conversion rates achieved, demonstrating the viability of Annona squamosa seed oil as a new source for biodiesel production.
Article
Energy & Fuels
Zvonko B. Njezic, Milan D. Kostic, Bosko D. Maric, Olivera S. Stamenkovic, Olivera D. Simurina, Jugoslav Krstic, Vlada B. Veljkovic
Summary: A low-cost, highly active CaO-based catalyst was prepared from waste filter cake and used to catalyze the transesterification of rapeseed oil. The catalyst showed good performance under mild reaction conditions and allowed for the direct use of rapeseed oil with low free fatty acid content.
Article
Energy & Fuels
Harveer Singh Pali, Abhishek Sharma, Naveen Kumar, Yashvir Singh
Summary: The production of high quality biodiesel from Kusum oil using base catalysed transesterification has been optimized through statistical modeling. The optimized conditions yielded biodiesel with desirable characteristics and a high yield, making it a viable option for commercial production.
Article
Chemistry, Applied
Qi Chen, Anping Wang, Wenxuan Quan, Wei Gong
Summary: To develop new raw materials for biodiesel, Henbane seed oil was synthesized into biodiesel for the first time using K2O/γ-Al2O3 as a catalyst. The optimal transesterification reaction conditions were determined using central composite design and response surface methodology. The predicted biodiesel yield was 90.25%, and the quality of the biodiesel met the European standard EN14214.
FUEL PROCESSING TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
D. Murguia-Ortiz, I. Cordova, M. E. Manriquez, E. Ortiz-Islas, R. Cabrera-Sierra, J. L. Contreras, B. Alcantar-Vazquez, M. Trejo-Rubio, J. T. Vazquez-Rodriguez, L. V. Castro
Summary: Mexican dolomites doped with sodium nitrate were calcined to generate mixed metal oxides for catalytic transesterification of canola oil. Among all catalysts, Na-CaO/MgO exhibited the highest conversion rate of 95.4% and the optimal theoretical conversion rate of 97.46% was obtained through nonlinear programming.
Article
Chemistry, Applied
Hwi-Sung Lee, Jaeha Lee, Hanbin Seo, Hankyeul Kang, Do Heui Kim, Youn-Woo Lee
Summary: This study demonstrated the synthesis of biodiesel using Pd/ZSM-5 or commercial Pd/Al2O3 catalyst, with Pd/ZSM-5 showing a higher FAMEs yield of 97.1% compared to 58.0% for Pd/Al2O3 under the same conditions. Despite having higher Pd nanoparticles dispersion, Pd/ZSM-5 exhibited lower activity for CTH.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Thermodynamics
Papabathina Mastan Rao, Sneha Haresh Dhoria, S. Gopal Krishna Patro, Radha Krishna Gopidesi, Meshel Q. Alkahtani, Saiful Islam, Murkonda Vijaya, Juturi Lakshmi Jayanthi, Mohammad Amir Khan, Abdul Razak, Raman Kumar, Achmad Rizal, Muhammad Imam Ammarullah
Summary: In this study, the performance and emission characteristics of linseed bio-diesel with 5% graphene nanoparticles were evaluated using various methods and techniques. The results showed that the B20G5 blended fuel with 5% graphene nanoparticles exhibited better brake thermal efficiency, lower carbon monoxide and hydrocarbon emissions compared to diesel fuel, without the need for engine modifications.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Chemistry, Physical
Ieva Gaide, Violeta Makareviciene, Egle Sendzikiene
Summary: This study investigated the effectiveness of eggshells as a heterogeneous catalyst for biodiesel production and determined the optimal conditions for transesterification. A high ester yield was obtained under these conditions.
Article
Engineering, Environmental
Adeyinka Sikiru Yusuff, Afeez Olayinka Gbadamosi, Lekan Taofeek Popoola
Summary: This study developed a new eco-friendly solid catalyst from anthill-zinc modification for methanolysis of low-grade feedstock to produce biodiesel. The optimized conditions for the reaction resulted in a high biodiesel yield of 83.16%, showing good agreement with the predicted value. The catalyst exhibited better stability after being regenerated and reused for six cycles, indicating its potential for economical biofuel production from waste products.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Green & Sustainable Science & Technology
M. A. Hazrat, M. G. Rasul, M. M. K. Khan, N. Ashwath, I. M. R. Fattah, Hwai Chyuan Ong, T. M. Mahlia
Summary: Edible oil-based biodiesel production through transesterification was optimized using response surface methodology with the Box-Behnken model. The optimal process conditions were determined to be 5.89 M methanol, 0.5% (w/w) KOH, 60 degrees C, and 120 min, with a predicted yield of 99.5% and an experimental yield of 99.6%. In addition, two different kinetic models were developed and the activation energy for the pseudo-first-order irreversible reaction was found to be 16.9% higher than for the pseudo-homogenous irreversible reaction.
ENVIRONMENT DEVELOPMENT AND SUSTAINABILITY
(2023)
Article
Energy & Fuels
Rauf Foroutan, Seyed Jamaleddin Peighambardoust, Reza Mohammadi, Seyed Hadi Peighambardoust, Bahman Ramavandi
Summary: A novel heterogeneous catalyst based on walnut shell ash (WSA)/ZnO/K2CO3 composite was synthesized and successfully applied for the production of biodiesel via the transesterification process. The effect of independent variables including temperature, time, methanol to oil ratio, and catalyst concentration on the process efficiency was investigated using the response surface method-central composite design. The results confirmed the activity potential of the catalyst and the suitability of the produced biodiesel as a substitute for diesel-derived fuels.
Review
Engineering, Chemical
Violeta Makareviciene, Egle Sendzikiene
Summary: The noncatalytic supercritical process in biodiesel production simplifies the process, solves the problem of catalyst recovery and regeneration, and improves the efficiency of biodiesel production.
Article
Biochemistry & Molecular Biology
Disha Sharma, Shivani Uniyal, Lakshmi Tewari
Summary: A methanol tolerant extracellular lipase FDS8(L) was extracted from Bacillus mycoides strain CV18 and purified, showing superior catalytic performance when immobilized to form cross linked lipase enzyme aggregate (CLEA) for enhanced stability in the presence of methanol. The lipase exhibited optimal activity under alkaline conditions and had stimulatory effects from organic solvents and metal ions. Its efficacy in catalyzing transesterification of algal lipids in methanol was confirmed through TLC and FTIR spectroscopy analysis of the transesterification products.
PROCESS BIOCHEMISTRY
(2021)
Correction
Chemistry, Applied
Jia Liu, Juntong Dong, Xiaodan Li, Teng Xu, Zhenguo Li, Jeffrey Dankwa Ampah, Mubasher Ikram, Shihai Zhang, Chao Jin, Zhenlong Geng, Tianyun Sun, Haifeng Liu
FUEL PROCESSING TECHNOLOGY
(2024)
Article
Chemistry, Applied
Seba Alareeqi, Daniel Bahamon, Kyriaki Polychronopoulou, Lourdes F. Vega
Summary: This study explores the potential application of single-atom-alloy (SAA) catalysts in bio-oils hydrodeoxygenation refining using density functional theory (DFT) and microkinetic modeling. It establishes the relationships between stability, adsorptive properties, and activity structures for bio-oil derivatives, providing guidance for the synthesis of cost-effective SAA combinations.
FUEL PROCESSING TECHNOLOGY
(2024)
Article
Chemistry, Applied
Bin Hu, Wen -Ming Zhang, Xue-Wen Guo, Ji Liu, Xiao Yang, Qiang Lu
Summary: This study explored the pyrolysis behaviors and mechanisms of different monosaccharides, including arabinose, galactose, galacturonic acid, and glucuronic acid. The roles of structural differences in these monosaccharides were analyzed, and it was found that glucuronic acid undergoes a special C-C bond breaking reaction during pyrolysis. The findings provide a deep understanding of the pyrolysis chemistry of hemicellulose and the role of different branches.
FUEL PROCESSING TECHNOLOGY
(2024)
Review
Chemistry, Applied
Youwei Zhi, Donghai Xu, Guanyu Jiang, Wanpeng Yang, Zhilin Chen, Peigao Duan, Jie Zhang
Summary: Hydrothermal carbonization (HTC) is an effective method for the harmless disposal of municipal sludge (MS) and offers potential applications for the obtained products. Optimizing reaction conditions, coupling with other waste materials, and combining different processes can improve the performance of HTC. Furthermore, HTC contributes to energy recovery and enhances the quality of life cycle assessment.
FUEL PROCESSING TECHNOLOGY
(2024)
Article
Chemistry, Applied
Jia Wang, Jianchun Jiang, Dongxian Li, Xianzhi Meng, Arthur J. Ragauskas
Summary: This study presents a scalable process for converting holocellulose and cellulosic wastes into advanced oxygen-containing biofuels with high furan, cyclic ketone, and ethanol content. By combining hydropyrolysis and vapor-phase hydrodeoxygenation using Pd/Al2O3 as a catalyst, the researchers achieved high yields and conversions. The integrated process holds great promise for biomass waste conversion into advanced biofuels.
FUEL PROCESSING TECHNOLOGY
(2024)
Article
Chemistry, Applied
Florian Held, Jannis Reusch, Steffen Salenbauch, Christian Hasse
Summary: The accurate prediction and assessment of soot emissions in internal combustion engines are crucial for the development of sustainable powertrains. This study presents a detailed quadrature-based method of moments (QMOM) soot model coupled with a state-of-the-art flow solver for the simulation of gasoline engines. The model accurately describes the entire cause-and-effect chain of soot formation, growth and oxidation. Experimental validation and engine cycle simulations are used to identify the root cause of observed soot formation hotspots.
FUEL PROCESSING TECHNOLOGY
(2024)
