Article
Chemistry, Applied
Xinyu Li, Jose Andres Hernandez Gaitan, Shinya Kokuryo, Tomoka Sumi, Haruna Kitamura, Koji Miyake, Yoshiaki Uchida, Norikazu Nishiyama
Summary: Hierarchical zeolites with mesopores only on external surfaces were synthesized via an alkaline treatment for organic structure-directing agents (OSDA)-occluded zeolites. These zeolites exhibited higher catalytic activity and improved mass transfer due to the presence of mesopores on external surfaces. They also showed higher hydrothermal stability compared to conventional hierarchical zeolites.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Chemistry, Applied
Wenhao Cui, Dali Zhu, Juan Tan, Nan Chen, Dong Fan, Juan Wang, Jingfeng Han, Linying Wang, Peng Tian, Zhongmin Liu
Summary: Mesoporous high-silica zeolite Y, with improved accessibility of acid sites and mass transport properties, is a highly desired catalytic material for various industries. Its direct synthesis, named MSY, exhibits excellent catalytic cracking performance and thermal stability. The MSY-based catalyst demonstrates enhanced conversion and gasoline yield in cracking reactions compared to commercial ultra-stable Y and mesoporogen-free counterparts.
CHINESE JOURNAL OF CATALYSIS
(2022)
Article
Engineering, Environmental
T. A. Palankoev, K. Dement'ev, D. Kuznetsova, R. S. Borisov, A. L. Maximov, S. N. Khadzhiev
Summary: In this research, isotope labeling experiments were used to study the reaction pathways of acetone conversion in hydrocarbon medium in the presence of Y and ZSM-5 zeolites. The results showed that the deuterium labels introduced with acetone were mainly distributed in specific olefins and pentanes, supporting the previously proposed assumption.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Emad N. Al-Shafei, Ahmad Masudi, Zain H. Yamani, Oki Muraza
Summary: Nanozeolite Y was successfully synthesized without a template and modified with phosphorous (P) and various metals. The introduction of P altered the catalyst acidity and resulted in higher olefin yield, while the introduction of cobalt (Co) exhibited similar activity to the P-modified catalyst. However, the introduction of zirconium (Zr) caused a decrease in catalytic activity due to excessive metal distribution and blockage of the zeolite's porous structure.
Article
Energy & Fuels
Shuo Guo, Shanqing Yu, Huiping Tian, Zhijian Da
Summary: This study investigates the effects of three different binders on REUSY zeolite. Alumina sol notably damages the framework of zeolites by blocking the pore channels and removing framework Al. Silica sol enhances the structural stability and increases the number of Bronsted acid sites in zeolites, leading to better hydrothermal stability and higher micro-reaction activity. The influence of pseudo boehmite colloidal sol on zeolites falls between that of alumina sol and silica sol.
Article
Chemistry, Multidisciplinary
Songbo He, Thomas Sjouke Kramer, Dian Sukmayanda Santosa, Andre Heeres, Hero Jan Heeres
Summary: A catalytic co-conversion strategy using glycerol in combination with other bio-based feeds for the production of bio-based aromatics was investigated, showing synergistic effects and optimal operating conditions were achieved. This study provides valuable insights for the development of optimized co-feeding strategies for BTX formation.
Article
Agricultural Engineering
Jiajun Yu, Bingbing Luo, Siyu Wang, Kai Wu, Yujie Tao, Sheng Chu, Huiyan Zhang
Summary: In this study, Mo/HZSM-5 was modified by ultrasonic treatment to improve catalytic efficiency and reduce coking. It was found that ultrasonic treatment facilitated the diffusion of more Mo species into the HZSM-5 channels and enhanced the interaction between molybdenum species and HZSM-5 acid sites, leading to increased aromatic hydrocarbon yield. The activity of the ultrasonic Mo modified catalyst increased by 54%, resulting in an increase in aromatic carbon production from 5.09 mmol.g(cat)(-1) to 7.82 mmol.g(cat)(-1). The carbon yield of aromatics can reach 21.7% by adjusting the WHSV. The Ul-Mo/HZSM-5 catalyst showed excellent regeneration performance, with no decrease in activity after seven regenerations.
BIOMASS & BIOENERGY
(2023)
Article
Engineering, Chemical
Rafael B. Lima, Miguel M. S. Neto, Daniele S. Oliveira, Anne G. D. Santos, Luiz D. Souza, Vinicius P. S. Caldeira
Summary: Efforts have been made to synthesize hierarchical zeolites through NaOH treatment, using cetyltrimethylammonium bromide as pore-directing agent. Results showed that microwave heating method generated narrower pore size distribution, leading to higher conversion rate and temperature reduction in ZSM-5 zeolites.
ADVANCED POWDER TECHNOLOGY
(2021)
Article
Acoustics
L. Kuterasinski, U. Filek, M. Gackowski, M. Zimowska, M. Ruggiero-Mikolajczyk, P. J. Jodlowski
Summary: The ultrasonic-assisted desilication technique was shown to be an attractive and efficient method for preparing hierarchical zeolites with MFI structure type, which exhibited high selectivity and catalytic activity for the dehydration of ethanol. The use of ultrasounds during desilication procedure led to higher extraction of silicon and aluminum, resulting in elevated mesoporosity and enhanced catalytic properties in the prepared samples.
ULTRASONICS SONOCHEMISTRY
(2021)
Article
Chemistry, Physical
Eliana Carmo de Souza, Marcelo Maciel Pereira, Yiu Lau Lam, Edisson Morgado Jr, Luiz Silvino Chinelatto Jr
Summary: The use of AlPO4 as an active matrix has been shown to improve the performance of fluid catalytic cracking catalysts by increasing selectivity to cracking products, enhancing hydrothermal stability, and preserving more acid sites.
APPLIED CATALYSIS A-GENERAL
(2021)
Article
Chemistry, Applied
Ghasem Dashtpeyma, Seyed Reza Shabanian, Javad Ahmadpour, Maryam Nikzad
Summary: The microporous structure of Y zeolite strongly affects the function of adsorption desulphurization. This study aims to enhance the adsorption desulphurization performance of a novel bimetal Y zeolite with a hierarchically structured mesoporous sample. The results show that meso-NiCe significantly increases the adsorption capacity.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Energy & Fuels
Jun Zhang, Zhen Wu, Yafei Wu, Xiaoling Liu, Xun Li, Yu Zhang, Haian Xia, Fei Wang
Summary: The introduction of Zn species on the HZSM-5 catalyst can significantly improve the performance of catalytic cracking, leading to an increase in the production of aromatics, particularly monocyclic aromatics. Zn species alter the acidity of the catalyst and play a crucial role in the reaction.
Article
Environmental Sciences
Jose F. Padilha, Roger Frety, Alane P. Santos, Luis A. M. Pontes, Marilia R. Santos, Santiago Arias, Jose Geraldo A. Pacheco
Summary: This study investigated the co-processing of out-of-specification biodiesel residues in FCC units, using oleic acid methyl ester (OAME) as a biodiesel model, over ZSM-5 and Y zeolites. The results showed that different catalysts led to the formation of different hydrocarbons during the cracking process, with product distribution being influenced by catalyst shape selectivity and acidity. The findings suggest that residues from the biodiesel chain can be directly co-processed in FCC units to obtain high value hydrocarbons.
WASTE AND BIOMASS VALORIZATION
(2022)
Article
Chemistry, Physical
Christopher M. Lew, Cong-Yan Chen, Gary J. Long, Fernande Grandjean, Andrew S. Ichimura, Dan Xie, Nicolas A. Grosso-Giordano, Khetpakorn Chakarawet, Howard S. Lacheen, Kurt O. Jensen, Abraham Martinez, Alexander Katz, Bi-Zeng Zhan, Stacey I. Zones
Summary: The study compared the performance of Fe-SSZ-70 and Al-SSZ-70 in isomerization reactions, with Fe-SSZ-70 showing higher isomerization yield and selectivity due to its weaker acidity.
Article
Chemistry, Physical
Son Dong, Houqian Li, Iris K. Bloede, Abdullah J. Al Abdulghani, Edgard A. Lebron-Rodriguez, George W. Huber, Ive Hermans
Summary: The catalytic conversion of model compounds for plastic pyrolysis oil (1-octene, octadiene, octane, and toluene) over ZSM-5 in a fixed-bed reactor was investigated mechanistically. The conversion of 1-octene resulted in the production of benzene, toluene, xylene, coke, and hydrogen through a series of cracking, oligomerization, cyclization, and hydrogen transfer reactions. Octadiene mainly contributed to reactor fouling through thermal coking, while octane and toluene were converted through cracking reactions and disproportionation, dealkylation, and coking reactions, respectively. The use of mesoporous ZSM-5 maintained product selectivity for 70 hours in time-on-stream experiments.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Applied
Reza Ravandi, Reza Khoshbin, Ramin Karimzadeh
JOURNAL OF POROUS MATERIALS
(2018)
Article
Materials Science, Multidisciplinary
Shima Oruji, Reza Khoshbin, Ramin Karimzadeh
MATERIALS CHEMISTRY AND PHYSICS
(2019)
Article
Chemistry, Physical
Sahar Safari, Reza Khoshbin, Ramin Karimzadeh
REACTION KINETICS MECHANISMS AND CATALYSIS
(2020)
Article
Engineering, Chemical
Roya Hamidi, Reza Khoshbin, Ramin Karimzadeh
Summary: A series of Ni-Mo/Al2O3-Y hybrid nanocatalysts were synthesized for hydrocracking of heavy oil, showing high hydrodesulfurization activity and increased pore volume and external surface area when synthesized through a two-step method. The synthesized zeolite was effective in converting heavy oil to lighter products, reducing viscosity by up to 60%, and removing 58% of sulfur.
ADVANCED POWDER TECHNOLOGY
(2021)
Article
Engineering, Chemical
Mahnoush Salehi, Reza Asadi, Jafar Towfighi Darian, Reza Khoshbin
Summary: The study investigates the effects of different promoters on the yield and selectivity of propylene in oxidative dehydrogenation of propane. Titania nanotubes with distinct promoters including silver, nitrogen, and cerium were synthesized and used as catalyst supports. Among them, the Mo/Ce-TNT catalyst showed the highest efficiency with significantly improved propylene yield and selectivity.
ADVANCED POWDER TECHNOLOGY
(2022)
Article
Energy & Fuels
Faezeh Mirshafiee, Ramin Karimzadeh, Reza Khoshbin
Summary: A new type of host-guest composite catalyst, ZSM-5/Beta, was synthesized with hierarchical pore system. The 30% Beta zeolite sample showed higher activity, gasoline yield, and longer catalyst lifetime. The binary structure of these catalysts not only integrated the pore characteristics of ZSM-5 and Beta zeolites but also changed the acid properties, creating new active sites, leading to improved selectivity to alkylated aromatics and gasoline quality.
Article
Energy & Fuels
Leila Yosefi, Reza Khoshbin, Ramin Karimzadeh
Summary: A series of novel nickel, molybdenum, and cobalt loaded boron nitride adsorbents were synthesized for adsorptive removal of DBT from model diesel fuel. Among these adsorbents, cobalt and nickel loaded boron nitride showed the best desulfurization capacity. This enhancement in adsorption performance could be attributed to the interactions between metal oxides and the adsorbent.
Article
Green & Sustainable Science & Technology
Faezeh Mirshafiee, Reza Khoshbin, Ramin Karimzadeh
Summary: A new composite zeolite, ZSM-5/Beta, was successfully developed by incorporating Beta zeolite into the synthesis gel of ZSM-5 zeolite. The composite material exhibited improved crystallinity and surface properties, and had higher total pore volume and more mesopores compared to the original ZSM-5 zeolite. The composite catalyst showed lower acidity and a reduced number of acid sites, which contributed to decreased coke deposition. Evaluation of catalytic activity in the MTG process demonstrated that the composite catalyst had higher selectivity and yield compared to the initial ZSM-5 zeolite.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Green & Sustainable Science & Technology
Faezeh Mirshafiee, Reza Khoshbin, Ramin Karimzadeh
Summary: In this study, the effect of water co-feeds on the distribution of reaction products and coking behavior of a novel composite catalyst was investigated. The results showed that adding water to the reaction had a positive impact on catalyst activity and lifetime under certain conditions.
Article
Engineering, Chemical
Reza Khoshbin, Maryam Naeimi, Fatemeh Mohamad Alikhani, Monireh Sadat Hosseini Hashemi, Hiresh Moradi
Summary: A series of MgO/ZnAl2O4 nanocatalysts were prepared and evaluated for their physicochemical properties. The catalysts with porous structure and highly dispersed active phase were successfully synthesized by different synthesis methods and fuel ratios. Among them, the sample synthesized with a urea to citric acid ratio of 1:2 exhibited the best catalytic performance and stability.
ADVANCED POWDER TECHNOLOGY
(2023)
Article
Engineering, Chemical
Farid Masoumi, Sahar Safari, Reza Khoshbin, Ramin Karimzadeh
Summary: Rice husk ash (RHA) was successfully utilized as a silica precursor to synthesize TS-1 zeolite through hydrothermal synthesis. The synthesized TS-1 zeolite from RHA showed comparable properties to the TS-1 synthesized with TEOS. The prepared NiMo/TS-1 catalyst using RHA as support showed superior hydrodesulfurization activity compared to catalysts prepared with other methods.
ADVANCED POWDER TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Roya Hamidi, Reza Khoshbin, Ramin Karimzadeh
Article
Chemistry, Multidisciplinary
Sahar Safari, Reza Khoshbin, Ramin Karimzadeh
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)