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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 moleculesaffinity between the carbon templates and zeolite precursors, the substantial strategies for synthesizing hierarchicalzeolites are introduced in direct templates and indirect templates.cost-effective and large-scale production methodologies, which are essential to the industrial application of hierarchicalzeolites.

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

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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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Layer-like FAU-type zeolites: A comparative view on different preparation routes

Bastian Reiprich, Tobias Weissenberger, Wilhelm Schwieger, Alexandra Inayat

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 2,   Pages 127-142 doi: 10.1007/s11705-019-1883-3

Abstract: The creation of intergrown layer-like zeolite crystals is one route to form hierarchical zeolites.Faujasite-type (FAU-type) zeolites are among the industrially most important zeolites and the implementationof hierarchical porosity is a promising way to optimise their catalytic and adsorptive performance.After a short general survey into routes for the preparation of hierarchical pore systems in FAU, we

Keywords： FAU     hierarchical zeolite     layer-like morphology    

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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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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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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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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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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, zeolitesTo 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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Deep convolutional tree-inspired network: a decision-tree-structured neural network for hierarchical

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 4,   Pages 814-828 doi: 10.1007/s11465-021-0650-6

Abstract: decision-tree-structured neural network, that is, the deep convolutional tree-inspired network (DCTN), for the hierarchicalnetwork (CNN) and decision tree methods by rebuilding the output decision layer of CNN according to the hierarchicalThe proposed DCTN model has unique advantages in 1) the hierarchical structure that can support moreaccuracy and comprehensive fault diagnosis, 2) the better interpretability of the model output with hierarchical

Keywords： bearing     cross-severity fault diagnosis     hierarchical fault diagnosis     convolutional neural network    

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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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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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Combined reticular blind drainage and vertical hierarchical drainage system for landfills located in

Wenjing LU,Zhonge FU,Yan ZHAO

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 1,   Pages 177-184 doi: 10.1007/s11783-014-0710-9

Abstract: water control technology that combines the features of a reticular blind drainage system and a vertical hierarchicalThe vertical hierarchical drainage system was installed to separate rainfall water and leachate in theleachate derived from rainfall water and groundwater inflow was avoided upon installation of the vertical hierarchical

Keywords： landfill     reticular blind drain     vertical hierarchical drain     guidance and drainage     impermeable layer    

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Fabrication of titanosilicate pillared MFI zeolites with tailored catalytic activity

Baoyu Liu, Qiaowen Mu, Jiajin Huang, Wei Tan, Jing Xiao

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 5,   Pages 772-782 doi: 10.1007/s11705-019-1859-3

Abstract: dibenzothiophene (DBT) was used to evaluate the catalytic performance of the obtained titanosilicate pillared MFI zeolitesselectivity of dibenzothiophene sulfone (DBTS) were most affected by the textural properties of the zeolitesThis was attributed to the DBT and DBTS molecules being larger than micropores of the MFI zeolites.These results implied that a balance between the meso- and microporosity of zeolites and tetrahedrally

Keywords： MFI zeolite     catalysis     nanosheets     fabrication    

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Effect of hierarchical ZSM-5 zeolite crystal size on diffusion and catalytic performance of n-heptane

Shuman Xu, Xiaoxiao Zhang, Dangguo Cheng, Fengqiu Chen, Xiaohong Ren

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 4,   Pages 780-789 doi: 10.1007/s11705-018-1733-8

Abstract: Hierarchical ZSM-5 zeolite aggregates with different sizes of nanocrystals were synthesized using differentCracking over hierarchical zeolites with nanocrystal sizes larger than about 50 nm took place under transition-limitingconditions, whereas the reaction over hierarchical zeolites with nanocrystal sizes of 15 or 30 nm proceededHierarchical ZSM-5 zeolite aggregates with smaller nanocrystals had better selectivity for light olefins

Keywords： hierarchical ZSM-5     crystal size     catalytic cracking     Thiele modulus     effectiveness factor    

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Image meshing via hierarchical optimization

Hao XIE,Ruo-feng TONG

Frontiers of Information Technology & Electronic Engineering 2016, Volume 17, Issue 1,   Pages 32-40 doi: 10.1631/FITEE.1500171

Abstract: To ameliorate this situation, we present a hierarchical optimization algorithm solving the problem from

Keywords： Image meshing     Hierarchical optimization     Convexification    

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Title Author Date Type Operation

Hierarchically porous zeolites synthesized with carbon materials as templates

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

Layer-like FAU-type zeolites: A comparative view on different preparation routes

Bastian Reiprich, Tobias Weissenberger, Wilhelm Schwieger, Alexandra Inayat

Journal Article

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

German Sastre

Journal Article

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

Xingling Zhao, Jun Xu, Feng Deng

Journal Article

Multifunctional heteroatom zeolites: construction and applications

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

Mesoporous zeolites for biofuel upgrading and glycerol conversion

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

Journal Article

Deep convolutional tree-inspired network: a decision-tree-structured neural network for hierarchical

Journal Article

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

Zaiku Xie, Bao-Lian Su

Journal Article

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

Jie ZHU, Xiangju MENG, Fengshou XIAO

Journal Article

Combined reticular blind drainage and vertical hierarchical drainage system for landfills located in

Wenjing LU,Zhonge FU,Yan ZHAO

Journal Article

Fabrication of titanosilicate pillared MFI zeolites with tailored catalytic activity

Baoyu Liu, Qiaowen Mu, Jiajin Huang, Wei Tan, Jing Xiao

Journal Article

Effect of hierarchical ZSM-5 zeolite crystal size on diffusion and catalytic performance of n-heptane

Shuman Xu, Xiaoxiao Zhang, Dangguo Cheng, Fengqiu Chen, Xiaohong Ren

Journal Article

Image meshing via hierarchical optimization

Hao XIE,Ruo-feng TONG

Journal Article