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Confinement effects in methanol to olefins catalysed by zeolites: A computational review

German Sastre

Frontiers of Chemical Science and Engineering 2016, Volume 10, Issue 1,   Pages 76-89 doi: 10.1007/s11705-016-1557-3

Abstract: Small pore zeolites, containing 8-rings as the largest, are widely employed as catalysts in the processSmall pore zeolites and silicon-aluminophosphates(SAPOs) containing cavities, where olefins are mainlyof these and other species will be reviewed in terms of confinement effects in different cage-based zeolites

Keywords： small pore zeolites     SAPOs     methanol-to-olefins     hydrocarbon pool mechanism     alkylation of polymethylbenzenes    

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The effect of hierarchical single-crystal ZSM-5 zeolites with different Si/Al ratios on its pore structure

Yuexin Hou, Xiaoyun Li, Minghui Sun, Chaofan Li, Syed ul Hasnain Bakhtiar, Kunhao Lei, Shen Yu, Zhao Wang, Zhiyi Hu, Lihua Chen, Bao-Lian Su

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 2,   Pages 269-278 doi: 10.1007/s11705-020-1948-3

Abstract: Hierarchical single-crystal ZSM-5 zeolites with different Si/Al ratios (Hier-ZSM-5- , where = 50, 100excellent mechanical and hydrothermal stability, and higher catalytic activity than commercial bulk zeolitesResults show that a decrease in the Si/Al ratio in hierarchical single-crystal ZSM-5 zeolites leads todiffusion inside the zeolite to contact with the acid sites in the micropores predominating in ZSM-5 zeolitesThis study can be extended to develop a series of hierarchical single-crystal zeolites with expected

Keywords： hierarchical zeolites     single crystalline     interconnected pores     improved diffusion performance     benzyl alcohol    

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Solid-state NMR for metal-containing zeolites: From active sites to reaction mechanism

Xingling Zhao, Jun Xu, Feng Deng

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 2,   Pages 159-187 doi: 10.1007/s11705-019-1885-1

Abstract: The advanced solid-state NMR (SSNMR) spectroscopy is robust in the study of zeolites and zeolite-catalyzedapplications of SSNMR for exploring the structure and property of active sites in metal-containing zeolitesFinally, we highlight the mechanistic understanding of catalytic reactions on metal-containing zeolites

Keywords： metal-containing zeolites     solid-state NMR     active site     host-guest interaction     reaction mechanism    

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Analyzing the characterization of pore structures and permeability of diesel contaminated clays under

Frontiers of Structural and Civil Engineering   Pages 1264-1280 doi: 10.1007/s11709-023-0921-x

Abstract: intrusion porosimetry (MIP) and X-ray micro-computed tomography (XRμCT) were used to characterize the poreanalysis yielded consistent results; it showed that aging renders pores more spherical and isotropic and poreThis weakens the pore connectivity.aging led to the rearrangement of soil particles, tighter interparticle overlapping, and a reduction in poreThe combination of MIP and XRμCT provided a comprehensive and reliable characterization of the soil pore

Keywords： MIP     XRμCT     aging     diesel content     pore structure     permeability characteristics    

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Multifunctional heteroatom zeolites: construction and applications

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 6,   Pages 1462-1486 doi: 10.1007/s11705-021-2099-x

Abstract: Multifunctional heteroatom zeolites have drawn broad attentions due to the possible synergistic effectsHerein, current research status of multifunctional heteroatom zeolites is briefly summarized, aimingFirst, the synthesis strategies toward heteroatom zeolites are introduced, including the direct synthesisproperties are shown and compared; finally, the catalytic applications of multifunctional heteroatom zeolites

Keywords： zeolite     multifunctional active sites     heteroatom     characterization     catalysis    

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Catalyst particle shapes and pore structure engineering for hydrodesulfurization and hydrodenitrogenation

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 6,   Pages 897-908 doi: 10.1007/s11705-021-2127-x

Abstract: Catalyst particle shapes and pore structure engineering are crucial for alleviating internal diffusionThe effects of catalyst particle shapes (sphere, cylinder, trilobe, and tetralobe) and pore structures(pore diameter and porosity) on HDS/HDN performance at the particle scale are investigated via mathematicalAn optimal average HDS/HDN reaction rate exists as the catalyst pore diameter and porosity increase,This study provides insights into the engineering of catalyst particle shapes and pore structures for

Keywords： hydrodesulfurization     hydrodenitrogenation     particle shape     pore structure    

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Hierarchically porous zeolites synthesized with carbon materials as templates

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 6,   Pages 1444-1461 doi: 10.1007/s11705-021-2090-6

Abstract: Hierarchically porous zeolites are promising candidates in catalytic conversion of relatively bulky moleculesmaterials have been widely employed as hard templates for the preparation of hierarchically porous zeolitesthe carbon templates and zeolite precursors, the substantial strategies for synthesizing hierarchical zeolitesIn addition, the technique of encapsulating metal species into zeolites crystals with the assistanceThis review is expected to attract interest in the synthesis strategies of hierarchically porous zeolites

Keywords： hierarchical zeolites     carbon materials     direct templates     indirect templates     carbon-silica composites    

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High-precision diffusion measurement of ethane and propane over SAPO-34 zeolites for methanol-to-olefin

Dali Cai, Yu Cui, Zhao Jia, Yao Wang, Fei Wei

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 1,   Pages 77-82 doi: 10.1007/s11705-017-1684-5

Abstract: However, a quantitative study of diffusion problems in SAPO-34 zeolites is lacking.The diffusions of ethane and propane over fresh and coked SAPO-34 zeolites with different crystal sizesbelieve that this work would be helpful for understanding the diffusion of different molecules in SAPO-34 zeolites

Keywords： diffusion measurement     methanol-to-olefin process    

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Uncoupled state space solution to layered poroelastic medium with anisotropic permeability and compressible pore

Zhiyong AI, Wenze ZENG, Yichong CHENG, Chao WU

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 2,   Pages 171-179 doi: 10.1007/s11709-011-0103-0

Abstract: three-dimensional consolidation of layered poroelastic medium with anisotropic permeability and compressible poreNumerical results show that the anisotropy of permeability and the compressibility of pore fluid have

Keywords： solution     layered poroelastic medium     three-dimensional consolidation     anisotropic permeability     compressible pore    

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Influence of pore structure on biologically activated carbon performance and biofilm microbial characteristics

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 6, doi: 10.1007/s11783-021-1419-1

Abstract:

• Pore structure affects biologically activated carbon performance.

Keywords： Granular activated carbon     Biologically activated carbon filter     Bacterial community structure     Pore    

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Effect of catalyst layer mesoscopic pore-morphology on cold start process of PEM fuel cells

Ahmed Mohmed DAFALLA, Fangming JIANG

Frontiers in Energy 2021, Volume 15, Issue 2,   Pages 460-472 doi: 10.1007/s11708-021-0733-4

Abstract: This work studies the effect of CCL mesoscopic pore-morphology on PEMFC cold start.The CCL mesoscale morphology is characterized by two tortuosity factors of the ionomer network and poreThe CCL of less tortuous pore structure reduces the water back diffusion resistance from the CCL to protonpreparation methods, which can create catalyst layers of larger size primary pores and less tortuous pore

Keywords： cold start     energy conversion     fuel cells     mesoscale morphology     tortuosity     water management    

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Mesoporous zeolites for biofuel upgrading and glycerol conversion

Jian Zhang, Liang Wang, Yanyan Ji, Fang Chen, Feng-Shou Xiao

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 1,   Pages 132-144 doi: 10.1007/s11705-017-1681-8

Abstract: In particular, owing to their uniform micropores, strong acidity, and stable and rigid frameworks, zeolitesHowever, the relatively small sizes of the zeolite micropores strongly limit the conversion of bulkyTo overcome this issue, mesoporous zeolites with pores larger than those of biomolecules have been synthesizedAs expected, these mesoporous zeolites have outperformed conventional zeolites with improved activitiesThis review briefly summarizes recent works on the rational synthesis of mesoporous zeolites and their

Keywords： biomass conversion     mesoporous zeolite     sustainable chemistry    

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Crystalline porous materials: from zeolites to metal-organic frameworks (MOFs)

Zaiku Xie, Bao-Lian Su

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 2,   Pages 123-126 doi: 10.1007/s11705-020-1921-1

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A ruptured recurrent small bowel gastrointestinal stromal tumour causing hemoperitoneum

Eric C.H. Lai,Kam Man Chung,Stephanie H.Y. Lau,Wan Yee Lau

Frontiers of Medicine 2015, Volume 9, Issue 1,   Pages 108-111 doi: 10.1007/s11684-014-0344-0

Abstract: intra-abdominal recurrence from a previously resected gastrointestinal stromal tumour (GIST) of the smallIn this patient who presented with spontaneous rupture of a small intestinal GIST, the novel use of targeted

Keywords： gastrointestinal stromal tumour     hemoperitoneum     small bowel GIST     small bowel neoplasm     imatinib    

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Mesoporous zeolites as efficient catalysts for oil refining and natural gas conversion

Jie ZHU, Xiangju MENG, Fengshou XIAO

Frontiers of Chemical Science and Engineering 2013, Volume 7, Issue 2,   Pages 233-248 doi: 10.1007/s11705-013-1329-2

Abstract: Zeolites have been regarded as one of the most important catalysts in petrochemical industry due to theirHowever, the sole micropores in zeolites severely limit their applications in oil refining and naturalTo solve the problem, mesoporous zeolites have been prepared by introducing mesopores into the zeolitereview, after giving a brief introduction to preparation, structure, and characterization of mesoporous zeolites, we systematically summarize catalytic applications of these mesoporous zeolites as efficient catalysts

Keywords： mesoporous zeolite     catalysis     oil refining     natural gas conversion    

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Title Author Date Type Operation

Confinement effects in methanol to olefins catalysed by zeolites: A computational review

German Sastre

Journal Article

The effect of hierarchical single-crystal ZSM-5 zeolites with different Si/Al ratios on its pore structure

Yuexin Hou, Xiaoyun Li, Minghui Sun, Chaofan Li, Syed ul Hasnain Bakhtiar, Kunhao Lei, Shen Yu, Zhao Wang, Zhiyi Hu, Lihua Chen, Bao-Lian Su

Journal Article

Solid-state NMR for metal-containing zeolites: From active sites to reaction mechanism

Xingling Zhao, Jun Xu, Feng Deng

Journal Article

Analyzing the characterization of pore structures and permeability of diesel contaminated clays under

Journal Article

Multifunctional heteroatom zeolites: construction and applications

Journal Article

Catalyst particle shapes and pore structure engineering for hydrodesulfurization and hydrodenitrogenation

Journal Article

Hierarchically porous zeolites synthesized with carbon materials as templates

Journal Article

High-precision diffusion measurement of ethane and propane over SAPO-34 zeolites for methanol-to-olefin

Dali Cai, Yu Cui, Zhao Jia, Yao Wang, Fei Wei

Journal Article

Uncoupled state space solution to layered poroelastic medium with anisotropic permeability and compressible pore

Zhiyong AI, Wenze ZENG, Yichong CHENG, Chao WU

Journal Article

Influence of pore structure on biologically activated carbon performance and biofilm microbial characteristics

Journal Article

Effect of catalyst layer mesoscopic pore-morphology on cold start process of PEM fuel cells

Ahmed Mohmed DAFALLA, Fangming JIANG

Journal Article

Mesoporous zeolites for biofuel upgrading and glycerol conversion

Jian Zhang, Liang Wang, Yanyan Ji, Fang Chen, Feng-Shou Xiao

Journal Article

Crystalline porous materials: from zeolites to metal-organic frameworks (MOFs)

Zaiku Xie, Bao-Lian Su

Journal Article

A ruptured recurrent small bowel gastrointestinal stromal tumour causing hemoperitoneum

Eric C.H. Lai,Kam Man Chung,Stephanie H.Y. Lau,Wan Yee Lau

Journal Article

Mesoporous zeolites as efficient catalysts for oil refining and natural gas conversion

Jie ZHU, Xiangju MENG, Fengshou XIAO

Journal Article