Article
Chemistry, Physical
Magnus Morten, Tomas Cordero-Lanzac, Pieter Cnudde, Evgeniy A. Redekop, Stian Svelle, Veronique van Speybroeck, Unni Olsbye
Summary: The study focused on the effect of acid strength on the kinetics of benzene methylation with metal-substituted H-MeAlPO-5 materials. The results revealed a linear relationship between acid strength and methylation activation energy, with significant differences in byproduct distribution between different catalysts. Additionally, the Mg-substituted catalyst showed the highest activity for the selective methylation of alkenes, as compared to other catalysts.
JOURNAL OF CATALYSIS
(2021)
Article
Chemistry, Applied
Y. Zhang, B. Louis
Summary: A modified ZSM-5 zeolite with high external surface area (ESA) and mild acidity was efficiently synthesized using a biochar obtained from algae as a hard template. The modified zeolite exhibited an ESA of 171 m2/g, compared to 121 m2/g for pristine ZSM-5. It also showed improved catalytic lifetime in the methanol-to-hydrocarbons (MTH) reaction, with a methanol conversion >95% for 16 hours, compared to only 10 hours for H-ZSM-5.
MICROPOROUS AND MESOPOROUS MATERIALS
(2023)
Article
Chemistry, Physical
Jonas Hedlund, Ming Zhou, Abrar Faisal, Olov G. W. Oehrman, Valeria Finelli, Matteo Signorile, Valentina Crocella, Mattias Grahn
Summary: In this study, a systematic investigation was conducted on two sets of defect-free and defective ZSM-5 crystals with controlled thickness. Their performances in methanol conversion were analyzed, and strong correlations were observed between crystal thickness and deactivation rate as well as selectivity. Thinner defect-free crystals showed superior activity and selectivity, while thicker crystals and crystals with defects exhibited faster deactivation.
JOURNAL OF CATALYSIS
(2022)
Article
Chemistry, Inorganic & Nuclear
Zihan Zhou, Rongli Jiang, Xueshuai Chen, Xingwen Wang, Huilin Hou
Summary: This paper successfully synthesized a hierarchical lamellar H-ZSM-5 zeolite with excellent catalytic performance for methanol to olefin conversion, using urea and PEG2000 as synthesis materials, providing an energy-efficient and eco-friendly synthesis strategy.
JOURNAL OF SOLID STATE CHEMISTRY
(2021)
Article
Chemistry, Applied
Yu Zhang, Q. Wang, B. Louis
Summary: ZSM-5 zeolite crystals were successfully grown on perlite supports using an in situ hydrothermal synthesis method. The resulting ZSM-5/perlite composite materials exhibited promising potential for application in the Methanol-To-Olefins reaction (MTO) due to their highly porous structure and large particle size. The optimized ZSM-5/perlite catalyst showed excellent stability with high methanol conversion and selectivity towards light olefins.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Chemistry, Physical
Li Zhang, Sen Wang, Zhangfeng Qin, Pengfei Wang, Guofu Wang, Mei Dong, Weibin Fan, Jianguo Wang
Summary: This study investigated the formation and evolution of primary hydrocarbon pool (HCP) species in the methanol to olefins (MTO) process over H-ZSM-5 zeolite. It was found that MCPdienes are identified as the primary HCP intermediates in the early transition period of MTO, promoting the production of olefins.
MOLECULAR CATALYSIS
(2021)
Article
Chemistry, Multidisciplinary
Mengya Xia, Qiaoxian Tong, Huai Sun, Yingxin Sun, Sheng Han, Qianggen Li
Summary: The reaction mechanisms of methanol to propene on a phosphorus-modified acidic FAU zeolite were studied using a two-layer ONIOM method. The potential energy surface analysis showed that the rate-determining steps differ for each pathway. The addition of phosphorus atoms to the zeolite decreases the energy barriers of the rate-determining steps. The electron migration direction and nature of the transition states were revealed by DCD, LOL, and RDG plots. The presence of van der Waals and weak covalent interactions were found in the transition state structures.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Weili Dai, Landong Li, Chang Wang, Liu Yang, Mingbin Gao, Xue Shao, Guangjun Wu, Naijia Guan, Zhaochao Xu, Mao Ye
Summary: This study presents a strategy of combining precoking and steaming to construct active naphthalenic species within SAPO-34 catalyst, achieving both high olefin selectivity and prolonged catalyst lifetime in methanol-to-olefin conversion. The spatiotemporal distribution and evolution of the naphthalenic species during the precoking and steaming processes were elucidated. This strategy shows promising prospects for commercial SAPO-34 catalyst in the methanol-to-olefin industry.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Engineering, Chemical
Zihan Zhou, Xingwen Wang, Rui Yu, Rongli Jiang, Yu Gao, Xueshuai Chen, Huilin Hou
Summary: In this paper, b-axis oriented ZSM-5 zeolite was synthesized by a solvent-free method using ammonia as a growth regulator. The zeolites were characterized using modern detection techniques such as XRD, SEM, BET, and NH3-TPD. The results showed that ammonia not only promoted the crystallization of ZSM-5 zeolite but also directed the synthesis of b-axis oriented ZSM-5 zeolite, which enhanced the selectivity of light olefins. The synthesis process of b-axis oriented ZSM-5 zeolite eliminated the need for mixing and aging in aqueous solution, reducing sewage discharge and autogenic pressure generation. This environmentally friendly approach could guide the green preparation of industrial ZSM-5 zeolites.
ADVANCED POWDER TECHNOLOGY
(2023)
Article
Chemistry, Physical
Antoine Beuque, Matthias Barreau, Elise Berrier, Jean-Francois Paul, Nuno Batalha, Alexander Sachse, Ludovic Pinard
Summary: The study on ethylene dehydroaromatisation revealed that the presence of long diffusion path lengths in micro-sized zeolite leads to mass transfer resistance, while nano-sized zeolite promotes fast formation of the active hydrocarbon pool due to shorter diffusion path length, resulting in higher activity and selectivity into benzene with significantly mitigated catalyst deactivation.
Article
Chemistry, Multidisciplinary
Xueshuai Chen, Rongli Jiang, Huilin Hou, Zihan Zhou, Xingwen Wang
Summary: This study synthesized an Mg-incorporated ZSM-5 zeolite with superior catalytic properties directly from laponite and tetraethylorthosilicate as raw materials via hydrothermal method. The ZSM-5 synthesized from laponite exhibited unique aggregated spherical morphology composed of sheet-like crystals, facilitated by depolymerized laponite acting as crystalline seeds. Furthermore, the Mg species in laponite entered into the ZSM-5 zeolite during crystallization, resulting in better catalytic performance for MTO reaction compared to ZSM-5(0) synthesized from TEOS as a single Si source.
Article
Engineering, Chemical
Mohammad Sadeghpour Aghdam, Sima Askari, Rouein Halladj, Amir Fouladi Tajar
Summary: The use of ultrasonic waves in the synthesis of zeolites leads to shorter crystallization time and improved properties. The study investigates the hydrothermal and sonochemical synthesis methods to prepare nanostructured ZSM-5/ZSM-12 composite zeolites with different Si/Al ratios and alkalinity. The results show that sonochemical synthesis enhances crystallization, amorphous microcrystal formation, and the dominance of MFI phase. The sonochemical zeolites exhibit higher crystallinity, smaller crystals, greater surface areas, higher Bronsted acid sites concentration, and stronger strength of moderate/strong acid sites compared to hydrothermal zeolites. Moreover, the sonochemical zeolites demonstrate higher methanol conversion, selectivity toward olefins, and lower alkanes selectivity in the MTH conversion reaction.
ADVANCED POWDER TECHNOLOGY
(2022)
Article
Chemistry, Physical
Damin Lee, Jong Jin Kim, Mansoor Ali, Jin Woo Choung, Won Bo Lee, Jong Wook Bae, Myung-June Park
Summary: A new kinetic model based on dual-cycle reaction mechanism was developed to synthesize gasoline-range hydrocarbons from dimethyl ether over a nanostructured ZSM-5 catalyst. The model accurately predicted product selectivity and yield variations with operating conditions.
CATALYSIS SCIENCE & TECHNOLOGY
(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, Physical
Shu Zeng, Wenna Zhang, Junjie Li, Shanfan Lin, Shutao Xu, Yingxu Wei, Zhongmin Liu
Summary: This study investigates the ethanol-to-hydrocarbons (ETH) process for sustainable production of light olefins. Through experiments and calculations, it reveals the critical role of hydrocarbon pool (HCP) species in the formation of olefins in the ETH process.
JOURNAL OF CATALYSIS
(2022)
Article
Chemistry, Applied
Pablo del Campo, Unni Olsbye, Karl Petter Lillerud, Stian Svelle, Pablo Beato
Article
Chemistry, Applied
Pablo del Campo, Pablo Beato, Fernando Rey, Maria Teresa Navarro, Unni Olsbye, Karl Petter Lillerud, Stian Svelle
Article
Chemistry, Physical
Matteo Signorile, Daniel Rojo-Gama, Francesca Bonino, Pablo Beato, Stian Svelle, Silvia Bordiga
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2018)
Article
Chemistry, Applied
Matteo Signorile, Daniel Rojo Gama, Francesca Bonino, Stian Svelle, Pablo Beato, Silvia Bordiga
Article
Chemistry, Applied
K. A. Lomachenko, A. Martini, D. K. Pappas, C. Negri, M. Dyballa, G. Berlier, S. Bordiga, C. Lamberti, U. Olsbye, S. Svelle, P. Beato, E. Borfecchia
Article
Chemistry, Physical
Dimitrios K. Pappas, Elisa Borfecchia, Michael Dyballa, Kirill A. Lomachenko, Andrea Martini, Gloria Berlier, Bjornar Arstad, Carlo Lamberti, Silvia Bordiga, Unni Olsbye, Stian Svelle, Pablo Beato
Article
Chemistry, Physical
Julian Holzinger, Malte Nielsen, Pablo Beato, Rasmus Yding Brogaard, Carlo Buono, Michael Dyballa, Hanne Falsig, Jorgen Skibsted, Stian Svelle
JOURNAL OF PHYSICAL CHEMISTRY C
(2019)
Article
Chemistry, Physical
Michael Dyballa, Dimitrios K. Pappas, Karoline Kvande, Elisa Borfecchia, Bjornar Arstad, Pablo Beato, Unni Olsbye, Stian Svelle
Article
Chemistry, Applied
Dimitrios K. Pappas, Elisa Borfecchia, Kirill A. Lomachenko, Andrea Lazzarini, Emil S. Gutterod, Michael Dyballa, Andrea Martini, Gloria Berlier, Silvia Bordiga, Carlo Lamberti, Bjornar Arstad, Unni Olsbye, Pablo Beato, Stian Svelle
TOPICS IN CATALYSIS
(2019)
Article
Chemistry, Physical
Michael Dyballa, Knut Thorshaug, Dimitrios K. Pappas, Elisa Borfecchia, Karoline Kvande, Silvia Bordiga, Gloria Berlier, Andrea Lazzarini, Unni Olsbye, Pablo Beato, Stian Svelle, Bjornar Arstad
Article
Chemistry, Multidisciplinary
Emil S. Gutterod, Andrea Lazzarini, Torstein Fjermestad, Gurpreet Kaur, Maela Manzoli, Silvia Bordiga, Stian Svelle, Karl P. Lillerud, Egill Skulason, Sigurd Oien-Odegaard, Ainara Nova, Unni Olsbye
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2020)
Article
Chemistry, Applied
Farnoosh Goodarzi, Irene Pinilla Herrero, Georgios N. Kalantzopoulos, Stian Svelle, Andrea Lazzarini, Pablo Beato, Unni Olsbye, Soren Kegnaes
MICROPOROUS AND MESOPOROUS MATERIALS
(2020)
Article
Chemistry, Physical
Karoline Kvande, Dimitrios K. Pappas, Michael Dyballa, Carlo Buono, Matteo Signorile, Elisa Borfecchia, Kirill A. Lomachenko, Bjornar Arstad, Silvia Bordiga, Gloria Berlier, Unni Olsbye, Pablo Beato, Stian Svelle
Article
Chemistry, Physical
A. Molino, J. Holzinger, K. A. Lukaszuk, D. Rojo-Gama, A. E. Gunnaes, J. Skibsted, L. F. Lundegaard, S. Svelle, P. Beato, S. Bordiga, K. P. Lillerud
CATALYSIS SCIENCE & TECHNOLOGY
(2019)
Article
Chemistry, Physical
Malte Nielsen, Anders Hafreager, Rasmus Yding Brogaard, Kristof De Wispelaere, Hanne Falsig, Pablo Beato, Veronique Van Speybroeck, Stian Svelle
CATALYSIS SCIENCE & TECHNOLOGY
(2019)
Article
Chemistry, Applied
Qingyuan Zheng, Jack H. Williams, Scott Elgersma, Mick D. Mantle, Andrew J. Sederman, G. Leendert Bezemer, Constant M. Guedon, Lynn F. Gladden
Summary: In this study, a pilot-scale fixed-bed reactor compatible with NMR/MRI was developed for Fischer-Tropsch synthesis. Multiple magnetic resonance techniques were applied to quantitatively characterize different product species within catalyst pellets, providing valuable information for catalyst and reactor optimization.
Article
Chemistry, Applied
Lisa Ramisch, Sebastian Pfaff, Sabrina M. Gericke, Edvin Lundgren, Johan Zetterberg
Summary: We present a combination of optical operando techniques that allow simultaneous measurement of adsorbed species on catalyst surfaces, monitoring of surface oxide formation, and imaging of the gas phase above the catalyst surface. The experimental setup was validated by studying CO oxidation on Pd(100) at different pressures, revealing the effects of pressure on the heterogeneous catalytic reaction.
Article
Chemistry, Applied
Marta Paniagua, Gabriel Morales, Juan A. Melero, Daniel Garcia-Salgado
Summary: The influence of common impurities in levulinic acid on the catalytic performance of different acid catalysts for bio-jet fuel production was studied. It was found that furfural had the greatest detrimental effect on catalyst performance, while propyl-sulfonic acid-modified SBA-15 and sulfonic acid resin Amberlyst-70 showed good regeneration ability.
Article
Chemistry, Applied
Jesus Tapiador, Pedro Leo, Guillermo Calleja, Gisela Orcajo
Summary: This study presents a new MOF material, Zn-URJC-13, with acid and basic sites, permanent porosity, and high affinity to CO2 molecules. The Zn-URJC-13 catalyst exhibits efficient performance in CO2 cycloaddition reactions and can be reused multiple times.
Article
Chemistry, Applied
Dan Zhao, Vita A. Kondratenko, Dmitry E. Doronkin, Shanlei Han, Jan-Dierk Grunwaldt, Uwe Rodemerck, David Linke, Evgenii V. Kondratenko
Summary: This study demonstrates the potential of cheap and commercially available Zr or Ti-based supports and ZnO to serve as active and selective catalysts for propane dehydrogenation (PDH). The catalytically active species formed in situ under PDH conditions consist of isolated ZnOx. ZnOx on the surface of LaZrOx shows the highest rate of propene formation.
Article
Chemistry, Applied
Hanbyeol Kim, Jung Rae Kim, Young-Kwon Park, Jeong-Myeong Ha, Jungho Jae
Summary: In this study, metal phosphates were used as catalysts for biomass conversion to produce sustainable aromatics through DielsAlder cycloaddition reactions. The effects of synthesis method, activation method, and P/Ti molar ratio on the structure and acid properties of titanium phosphate catalysts were systematically studied. The mesoporous titanium phosphate catalyst synthesized by hydrothermal method at 180℃ for 12 h followed by ethanol refluxing at 60℃ for 24 h at a molar P/Ti ratio of 1 showed the highest surface area and acid site density.
Article
Chemistry, Applied
Yasin Khani, Sumin Pyo, Kwang-Eun Jeong, Chul-Ung Kim, Moonis Ali Khan, Byong-Hun Jeon, Kun-Yi Andrew Lin, Siyoung Q. Choi, Young-Kwon Park
Summary: A protonated form of Zeolite Socony Mobil-5 (H-ZSM-5) catalyst was synthesized through a hydrothermal method using different sources of silica. The effect of loading the catalyst with yttrium, samarium, and gadolinium on the acidic properties was investigated. Among the metal-loaded catalysts, the Sm/LHZ catalyst showed the best performance in the methanol to propylene conversion due to its high amount of weak and intermediate acid sites, while the Gd-LHZ catalyst increased the selectivity towards ethane and propane.
Article
Chemistry, Applied
Michael Franc, Ivana Cisarova, Jan Vesely
Summary: The present study investigates an enantioselective cyclization of enals with imidazolone derivatives catalyzed by a combination of achiral Pd(0) complex and chiral secondary amine. Corresponding spirocyclic imidazolones were produced in high yields with moderate diastereoselectivity and excellent enantioselectivity. The developed co-operative catalytic methodology provides a highly substituted spirocyclic scaffold with four stereogenic centers under mild conditions.
Article
Chemistry, Applied
Mauro Alvarez, Jennifer Cueto, David P. Serrano, Pablo Marin, Salvador Ordonez
Summary: This study focuses on improving the formulation and preparation methods of catalysts for the production of dimethyl carbonate. By using suitable catalyst preparation methods and copper salt precursors, the researchers successfully produced catalysts with optimal performance for dimethyl carbonate formation.
Article
Chemistry, Applied
Claudia J. Keijzer, Luc C. J. Smulders, Dennie Wezendonk, Jan Willem de Rijk, Petra E. de Jongh
Summary: This study investigates the catalytic behavior of alpha-alumina supported silver catalysts in the presence of chloride. It is found that the particle size of silver can affect the selectivity of the catalyst, but different strategies lead to different results. In this size range, the selectivity of ethylene oxide is correlated to the Ag : Al2O3 surface ratio.
Article
Chemistry, Applied
Takeshi Aihara, Wataru Aoki, Michikazu Hara, Keigo Kamata
Summary: The development of acid-base bifunctional catalysts is important for promoting specific chemical transformations. In this study, Ti-based perovskite oxides were synthesized and used as catalysts for two C-C bond-forming reactions (cyanosilylation and Knoevenagel condensation). The highly pure SrTiO3 nanoparticles with a high specific surface area exhibited the highest catalytic performance, and could be easily recovered and reused.
Article
Chemistry, Applied
Olga Gorlova, Petra Pribylova, Eliska Vyskocilova, Katerina Peroutkova, Jan Kohout, Iva Paterova
Summary: This study investigates the Baeyer-Villiger oxidation of beta-cyclocitral using tin-modified mixed oxides as catalysts. The optimal reaction conditions and the effects of various factors on the reaction course and selectivity were determined. The results show that tin-modified mixed oxides exhibit high activity and selectivity in the oxidation reaction.
Article
Chemistry, Applied
M. I. Avila, M. M. Alonso-Doncel, L. Briones, G. Gomez-Pozuelo, J. M. Escola, D. P. Serrano, A. Peral, J. A. Botas
Summary: The catalytic fast pyrolysis of lignin using ion-exchanged zeolite catalysts showed significant improvements in bio-oil quality and the production of aromatic hydrocarbons and oxygenated compounds.
Article
Chemistry, Applied
Enrico Catizzone, Giorgia Ferrarelli, Paolo Bruno, Girolamo Giordano, Massimo Migliori
Summary: The acid-catalysed alcohol conversion reaction is a promising route for de-fossilization strategies. Research on pure alcohol conversion and simultaneous dehydration of mixed alcohols have shown different product compositions, with the type and distribution of acid sites affecting the reaction mechanism.
Article
Chemistry, Applied
Alireza Ranjbari, Juho Kim, Jihee Yu, Jiyun Kim, Mireu Park, Nayoung Kim, Kristof Demeestere, Philippe M. Heynderickx
Summary: This study investigated a novel kinetic model for the adsorption and photocatalytic degradation of methyl orange using commercial ZnO and reduced ZnO photocatalysts. The results provided new insights into the interaction of catalysts with molecules of different charges and compared with a previous study on methylene blue. The presence of oxygen vacancies in ZnO and their effects on adsorption and photocatalytic degradation were analyzed, and the photocatalytic degradation rate of reduced ZnO was found to increase significantly.