Article
Energy & Fuels
Gisele Cristina Rabelo Silva, Maria Helena Cano de Andrade
Summary: This study proposes a model for deoxygenation of vegetable oil components in the manufacturing process of renewable diesel. By evaluating the conversion of triglycerides over the deoxygenation catalyst with rigorous kinetic data, the study analyzes the influence of reactor pressure, temperature, and H2/oil molar ratio, as well as the type of feedstocks. The model can be used for new product design, improving operation conditions, and economic analysis in green diesel manufacturing.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Energy & Fuels
Paivi Maki-Arvela, Mark Martinez-Klimov, Dmitry Yu. Murzin
Summary: The review focuses on the transformation of vegetable oils and fatty acids into jet fuel, emphasizing the product yields and distribution, desired catalyst properties, as well as reaction kinetics and mechanisms.
Article
Energy & Fuels
Larissa Noemi Silva Freitas, Fabiana P. de Sousa, Alessandra Rodrigues de Carvalho, Vanya M. D. Pasa
Summary: Bio-hydrocarbons were synthesized from macauba oils to produce low-cost biofuels for different transport sectors, with deoxygenation reactions achieving 100% conversion using beta zeolite catalyst in 3 hours. The use of already hydrolyzed macauba pulp oil and 10 bar H-2 resulted in higher percentage of hydrocarbons, offering a cost-effective alternative for large-scale biofuel production.
Review
Chemistry, Physical
Martin Hajek, Ales Vavra, Hector de Paz Carmona, Jaroslav Kocik
Summary: This review paper summarizes the current state-of-the-art of the chemical transformation of oils/fats to biofuels or bio-lubricants in transport, including two fuel types and three bio-lubricant synthesis methods, analyzing the conditions required for transformation and the properties of the final products, and discussing the comparison between biodiesel and green diesel with diesel from crude oil.
Article
Engineering, Environmental
Feng Li, Ao Xia, Xiaobo Guo, Wuyuan Zhang, Yun Huang, Xianqing Zhu, Xun Zhu, Qiang Liao
Summary: Fatty acid photodecarboxylase (CvFAP) found in Chlorella variabilis NC64A can efficiently catalyze the conversion of C16-C18 fatty acids into shortened hydrocarbons under visible light. In this study, a cascade system integrating lipase hydrolysis and CvFAP decarboxylation was demonstrated for the efficient production of hydrocarbon fuels from waste oils, achieving a high production rate of 18.4 mM/h and an optimal conversion of 61.2% with a residence time of 50 min.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Energy & Fuels
Chuhua Jia, Cheng Zhang, Shaoqu Xie, Wanli Zhang, Ziling Wang, Hongfei Lin
Summary: Researchers have developed a novel biphasic catalytic process to efficiently produce bio-jet fuel from fatty acids, aiming to reduce the production costs in the aviation industry. By adjusting the catalyst and solvent, cracking selectivity can be tuned. The optimized Ru/C catalyst exhibits excellent performance, achieving high carbon yield of jet-fuel-range alkanes at relatively low temperatures.
Article
Engineering, Environmental
Petr Straka, Milos Auersvald, Dan Vrtiska, Hugo Kittel, Pavel Simacek, Petr Vozka
Summary: The hydrotreating of scrap tires pyrolysis oil over commercial Ni-Mo/Al2O3 catalyst was investigated to produce high-quality alternative transportation fuel components. Despite the initial high content of olefins, aromatics, sulfur, and nitrogen, the fuel components obtained after hydrotreating met most fuel specifications. The different fractions of the oil can be used as gasoline, jet fuel, diesel, and marine fuel components by applying additional treatments or blending methods.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Food Science & Technology
Yi-Hsiou Tsai, Donyau Chiang, Yu-Ting Li, Tsong-Pyng Perng, Sanboh Lee
Summary: In this study, the properties of sunflower, soybean, olive, and canola oils were examined periodically at different elevated temperatures. It was found that the unsaturated triglyceride in oils reacts significantly with environmental oxygen or water vapor, leading to changes in optical absorbance, viscosity, electrical impedance, and acid value. Olive oil has the lowest rate of color center and dynamic viscosity among the four oils, with the smallest pre-exponential factor and the largest activation energy. The rate constants of the acid reaction in olive oil are the highest among the four oils, with the lowest pre-exponential factor.
Review
Engineering, Environmental
Mustapha D. Garba, Muhammad Usman, Sikandar Khan, Farrukh Shehzad, Ahmad Galadima, Muhammad Fahad Ehsan, Akram S. Ghanem, Muhammad Humayun
Summary: Meeting the ever-increasing global energy demands is a serious challenge of the 21st century, with one solution being the conversion of CO2 into hydrocarbon fuels. Utilizing heterogeneous catalysis with zeolite and non-zeolite based catalysts, as well as noble and transition metals, can lead to the production of high value-added HC fuels from CO2. This review article emphasizes the importance of research and technological advancements in this area for both industries and academia.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Green & Sustainable Science & Technology
Adele Sakhayi, Ali Bakhtyari, Mohammad Reza Rahimpour
Summary: This study investigates the conversion of lignin-derived compounds anisole and cyclohexanone using simulated lignin-derived syngas as an alternative to pure hydrogen. The experiments show high activity, selectivity, and yield under specific conditions, with sensitivity to reaction temperature, pressure, and WHSV.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Engineering, Chemical
Ryota Osuga, Atsushi Neya, Motohiro Yoshida, Mizuho Yabushita, Shuhei Yasuda, Sachiko Maki, Kiyoshi Kanie, Toshiyuki Yokoi, Atsushi Muramatsu
Summary: This study successfully improved the catalytic performance of low-temperature oxidative coupling of methane by using Ce-MFI zeolite supported Pd catalysts modified by a second metal. It was found that the coexistence of Pd and Co on Ce-MFI positively affected the C2H6 yield, and the highly dispersed Ce species in Ce-MFI also played a positive role in the catalytic reaction.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Food Science & Technology
Hye-Min Kim, Min-Kyung Park, Soo-Jeong Mun, Mun-Yhung Jung, Sang-Mi Lee, Young-Suk Kim
Summary: This study investigated the effects of different temperatures and types of vegetable oil on the formation of volatile compounds and hazardous compounds in fried Welsh onion. The results showed that the composition of certain volatile compounds decreased while others increased with higher temperatures. Hazardous compounds were detected at levels below the safety limits at the highest temperature.
Article
Chemistry, Applied
Kubra Emektar, Meryem Nur Kantekin-Erdogan, Aziz Tekin
Summary: Furan formation was studied in commercially refined sunflower, soybean, and olive oils at different temperatures and times. The results showed that temperature had a significant impact on furan formation, with higher temperatures leading to increased reaction rates.
Article
Chemistry, Physical
Yu Liu, Bernard P. Binks
Summary: The experiment explores the possibility of stable oil foams produced from vegetable oils containing long-chain triglycerides and fat crystals. It demonstrates that oleogels can be aerated to create oil foams stabilized by fat crystals, resulting in non-draining, non-coarsening, and non-coalescing oil foams. The stability of the oil foams decreases upon heating near the melting point of the crystals.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Editorial Material
Biotechnology & Applied Microbiology
Lu Lin, Rodrigo Ledesma-Amaro, Xiao-Jun Ji, He Huang
Summary: Nylons, important polyamide materials, can be synthesized from various monomers. Bio-based nylon monomers are traditionally obtained through chemical conversion from vegetable oils, but they can be more sustainably obtained through multienzymatic catalysis. For large-scale application of this process, enzyme engineering and process innovation must be combined.
TRENDS IN BIOTECHNOLOGY
(2023)
Article
Green & Sustainable Science & Technology
Joao L. C. W. Pimenta, Rafael D. T. Barreto, Onelia A. A. dos Santos, Luiz M. de Matos Jorge
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
(2020)
Article
Environmental Sciences
Regiane C. Ferreira, Diogo Dias, Isabel Fonseca, Maria Bernardo, Joao Lourenco Castagnari Willimann Pimenta, Nuno Lapa, Maria A. S. D. de Barros
Summary: Bovine bone char (BC) was used for highly efficient simultaneous removal of paracetamol and Cu(2+) ions from aqueous solutions. The presence of paracetamol enhanced the affinity of Cu(2+) in the binary system, leading to a higher removal rate of Cu2+.
ENVIRONMENTAL TECHNOLOGY
(2022)
Article
Engineering, Chemical
Joao Lourenco Castagnari Willimann Pimenta, Mariana de Oliveira Camargo, Rafael Belo Duarte, Onelia Aparecida Andreo dos Santos, Luiz Mario de Matos Jorge
Summary: An improved kinetic model for the deoxygenation of fatty acids was developed in this study, which successfully predicted the behavior of reactants, intermediates and products in various cases. Through data comparison and application of information criterions, it was concluded that the new model was the best fit for behavior prediction. Additionally, relevant data regarding reaction rates and selectivity for the new catalyst were provided.
CHEMICAL ENGINEERING SCIENCE
(2021)
Article
Energy & Fuels
Joao Lourenco Castagnari Willimann Pimenta, Mariana de Oliveira Camargo, Rafael Belo Duarte, Onelia Aparecida Andreo dos Santos, Luiz Mario de Matos Jorge
Summary: The study found that aerogel catalysts showed higher productivity and selectivity in the production of renewable diesel through deoxygenation of soybean oil, compared to impregnated catalysts. Additionally, the specific acidity of the catalyst appears to directly influence the cracking extent, which in turn affects its selectivity.
Article
Engineering, Chemical
Arielle Cristina Fornari, Joao Lourenco Castagnari Willimann Pimenta, Onelia Aparecida Andreo dos Santos, Luiz Mario de Matos Jorge
Summary: This study tested several CuO-ZnO/Al2O3 co-impregnated catalysts for methanol steam reforming to statistically optimize the Cu and Zn content. The optimal composition of 20.7% Cu and 13.4% Zn yielded the highest methanol conversion, with the catalyst synthesized with these contents showing the highest Cu area and dispersion, supporting the statistical analysis.
BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING
(2021)
Article
Multidisciplinary Sciences
Raphael Menechini Neto, Giane Goncalves Lenzi, Joao Lourenco Castagnari Willimann Pimenta, Arielle Cristina Fornari, Onelia Aparecida Andreo dos Santos, Luiz Mario de Matos Jorge
ACTA SCIENTIARUM-TECHNOLOGY
(2019)
Article
Energy & Fuels
Yingna Du, Chen Huang, Wei Jiang, Qiangwei Yan, Yongfei Li, Gang Chen
Summary: In this study, anionic surfactants modified hydrotalcite was used as a flow improver for crude oil under low-temperature conditions. The modified hydrotalcite showed a significant viscosity reduction effect on crude oil. The mechanism of the modified hydrotalcite on viscosity and pour point of crude oil was explored through characterization and analysis of the modified hydrotalcite and oil samples.
Article
Energy & Fuels
Mohammad Saeid Rostami, Mohammad Mehdi Khodaei
Summary: In this study, a hybrid structure, MIL-53(Al)@MWCNT, was synthesized by combining MIL-53(Al) particles and -COOH functionalized multi-walled carbon nanotube (MWCNT). The hybrid structure was then embedded in a polyethersulfone (PES) polymer matrix to prepare a mixed matrix membrane (MMM) for CO2/CH4 and CO2/N2 separation. The addition of MWCNTs prevented MIL-53(Al) aggregation, improved membrane mechanical properties, and enhanced gas separation efficiency.
Article
Energy & Fuels
Yunlong Li, Desheng Huang, Xiaomeng Dong, Daoyong Yang
Summary: This study develops theoretical and experimental techniques to determine the phase behavior and physical properties of DME/flue gas/water/heavy oil systems. Eight constant composition expansion (CCE) tests are conducted to obtain new experimental data. A thermodynamic model is used to accurately predict saturation pressure and swelling factors, as well as the phase boundaries of N2/heavy oil systems and DME/CO2/heavy oil systems, with high accuracy.
Article
Energy & Fuels
Morteza Afkhamipour, Ebad Seifi, Arash Esmaeili, Mohammad Shamsi, Tohid N. Borhani
Summary: Non-conventional amines are being researched worldwide to overcome the limitations of traditional amines like MEA and MDEA. Adequate process and thermodynamic models are crucial for understanding the applicability and performance of these amines in CO2 absorption, but studies on process modeling for these amines are limited. This study used rate-based modeling and Deshmukh-Mather method to model CO2 absorption by DETA solution in a packed column, validated the model with experimental data, and conducted a sensitivity analysis of mass transfer correlations. The study also compared the CO2 absorption efficiency of DETA solution with an ionic solvent [bmim]-[PF6] and highlighted the importance of finding optimum operational parameters for maximum absorption efficiency.
Article
Energy & Fuels
Arastoo Abdi, Mohamad Awarke, M. Reza Malayeri, Masoud Riazi
Summary: The utilization of smart water in EOR operations has gained attention, but more research is needed to understand the complex mechanisms involved. This study investigated the interfacial tension between smart water and crude oil, considering factors such as salt, pH, asphaltene type, and aged smart water. The results revealed that the hydration of ions in smart water plays a key role in its efficacy, with acidic and basic asphaltene acting as intrinsic surfactants. The pH also influenced the interfacial tension, and the aged smart water's interaction with crude oil depended on asphaltene type, salt, and salinity.
Article
Energy & Fuels
Dongao Zhu, Kun Zhu, Lixian Xu, Haiyan Huang, Jing He, Wenshuai Zhu, Huaming Li, Wei Jiang
Summary: In this study, cobalt-based metal-organic frameworks (Co-based MOFs) were used as supports and co-catalysts to confine the NHPI catalyst, solving the leaching issue. The NHPI@Co-MOF with carboxyl groups exhibited stronger acidity and facilitated the generation of active oxygen radicals O2•, resulting in enhanced catalytic activity. This research provides valuable insights into the selection of suitable organic linkers and broadens the research horizon of MOF hybrids in efficient oxidative desulfurization (ODS) applications.
Article
Energy & Fuels
Edwin G. Hoyos, Gloria Amo-Duodu, U. Gulsum Kiral, Laura Vargas-Estrada, Raquel Lebrero, Rail Munoz
Summary: This study investigated the impact of carbon-coated zero-valent nanoparticle concentration on photosynthetic biogas upgrading. The addition of nanoparticles significantly increased microalgae productivity and enhanced nitrogen and phosphorus assimilation. The presence of nanoparticles also improved the quality of biomethane produced.
Article
Energy & Fuels
Yao Xiao, Asma Leghari, Linfeng Liu, Fangchao Yu, Ming Gao, Lu Ding, Yu Yang, Xueli Chen, Xiaoyu Yan, Fuchen Wang
Summary: Iron is added as a flocculant in wastewater treatment and the hydrothermal carbonization (HTC) of sludge produces wastewater containing Fe. This study investigates the effect of aqueous phase (AP) recycling on hydrochar properties, iron evolution and environmental assessment during HTC of sludge. The results show that AP recycling process improves the dewatering performance of hydrochar and facilitates the recovery of Fe from the liquid phase.
Article
Energy & Fuels
He Liang, Tao Wang, Zhenmin Luo, Jianliang Yu, Weizhai Yi, Fangming Cheng, Jingyu Zhao, Xingqing Yan, Jun Deng, Jihao Shi
Summary: This study investigated the influence of inhibitors (carbon dioxide, nitrogen, and heptafluoropropane) on the lower flammability limit of hydrogen and determined the critical inhibitory concentration needed for complete suppression. The impact of inhibitors on explosive characteristics was evaluated, and the inhibitory mechanism was analyzed with chemical kinetics. The results showed that with the increase of inhibitor quantity, the lower flammability limit of hydrogen also increased. The research findings can contribute to the safe utilization of hydrogen energy.
Article
Energy & Fuels
Zonghui Liu, Zhongze Zhang, Yali Zhou, Ziling Wang, Mingyang Du, Zhe Wen, Bing Yan, Qingxiang Ma, Na Liu, Bing Xue
Summary: In this study, high-performance solid catalysts based on phosphotungstic acid (HPW) supported on Zr-SBA-15 were synthesized and evaluated for the one-pot conversion of furfural (FUR) to γ-valerolactone (GVL). The catalysts were characterized using various techniques, and the ratio of HPW and Zr was found to significantly affect the selectivity of GVL. The HPW/Zr-SBA-15 (2-4-15) catalyst exhibited the highest GVL yield (83%) under optimized reaction conditions, and it was determined that a balance between Bronsted acid sites (BAS) and Lewis acid sites (LAS) was crucial for achieving higher catalytic performance. The reaction parameters and catalyst stability were also investigated.
Article
Energy & Fuels
Michael Stoehr, Stephan Ruoff, Bastian Rauch, Wolfgang Meier, Patrick Le Clercq
Summary: As part of the global energy transition, an experimental study was conducted to understand the effects of different fuel properties on droplet vaporization for various conventional and alternative fuels. The study utilized a flow channel to measure the evolution of droplet diameters over time and distance. The results revealed the temperature-dependent effects of physical properties, such as boiling point, liquid density, and enthalpy of vaporization, and showed the complex interactions of preferential vaporization and temperature-dependent influences of physical properties for multi-component fuels.
Article
Energy & Fuels
Yuan Zhuang, Ruikang Wu, Xinyan Wang, Rui Zhai, Changyong Gao
Summary: Through experimental validation and optimization of the chemical kinetic model, it was found that methanol can accelerate the oxidation reaction of ammonia, and methanol can be rapidly oxidized at high concentration. HO2 was found to generate a significant amount of OH radicals, facilitating the oxidation of methanol and ammonia. Rating: 7.5/10.
Article
Energy & Fuels
Radwan M. EL-Zohairy, Ahmed S. Attia, A. S. Huzayyin, Ahmed I. EL-Seesy
Summary: This paper presents a lab-scale experimental study on the impact of diethyl ether (DEE) as an additive to waste cooking oil biodiesel with Jet A-1 on combustion and emission features of a swirl-stabilized premixed flame. The addition of DEE to biodiesel significantly affects the flame temperature distribution and emissions. The W20D20 blend of DEE, biodiesel, and Jet A-1 shows similar flame temperature distribution to Jet A-1 and significantly reduces UHC, CO, and NOx emissions compared to Jet A-1.
Article
Energy & Fuels
Jiang Bian, Ziyuan Zhao, Yang Liu, Ran Cheng, Xuerui Zang, Xuewen Cao
Summary: This study presents a novel method for ammonia separation using supersonic flow and develops a mathematical model to investigate the condensation phenomenon. The results demonstrate that the L-P nucleation model accurately characterizes the nucleation process of ammonia at low temperatures. Numerical simulations also show that increasing pressure and concentration can enhance ammonia condensation efficiency.
Article
Energy & Fuels
Shiyuan Pan, Xiaodan Shi, Beibei Dong, Jan Skvaril, Haoran Zhang, Yongtu Liang, Hailong Li
Summary: Integrating CO2 capture with biomass-fired combined heat and power (bio-CHP) plants is a promising method for achieving negative emissions. This study develops a reliable data-driven model based on the Transformer architecture to predict the flowrate and CO2 concentration of flue gas in real time. The model validation shows high prediction accuracy, and the potential impact of meteorological parameters on model accuracy is assessed. The results demonstrate that the Transformer model outperforms other models and using near-infrared spectral data as input features improves the prediction accuracy.