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Phosphorous removal from wastewater by lanthanum modified Y zeolites

Weikang ZHANG, Ye TIAN

Frontiers of Chemical Science and Engineering 2015, Volume 9, Issue 2,   Pages 209-215 doi: 10.1007/s11705-014-1448-4

Abstract: The adsorption capacities of Y zeolite and La (III)-modified Y zeolite were studied.A series of La(III)-modified Y zeolites with different La/Y zeolite mass ratios were characterized byThe capacity of the La (III)-modified Y zeolite to remove phosphate increased as the La/Y zeolite massratio increased and after 4 h, a phosphate removal efficiency of 95% was achieved for a La/Y zeolite

Keywords： phosphate removal     wastewater     lanthanum     impregnation     Y zeolites    

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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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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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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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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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Anion-exchange membrane direct ethanol fuel cells: Status and perspective

Zhao, Y.S. Li, S.Y. Shen

Frontiers in Energy 2010, Volume 4, Issue 4,   Pages 443-458 doi: 10.1007/s11708-010-0127-5

Abstract: Direct ethanol fuel cells (DEFCs) are a promising carbon-neutral and sustainable power source for portable, mobile, and stationary applications. However, conventional DEFCs that use acid proton-exchange membranes (typically Nafion type) and platinum-based catalysts exhibit low performance (i.e., the state-of-the-art peak power density is 79.5 mW/cm at 90°C). Anion-exchange membrane (AEM) DEFCs that use low-cost AEM and non-platinum catalysts have recently been demonstrated to yield a much better performance (i.e., the state-of-the-art peak power density is 160 mW/cm at 80°C). This paper provides a comprehensive review of past research on the development of AEM DEFCs, including the aspects of catalysts, AEMs, and single-cell design and performance. Current and future research challenges are identified along with potential strategies to overcome them.

Keywords： fuel cell     direct ethanol fuel cells     anion-exchange membrane     ethanol oxidation reaction     oxygen reduction reaction     cell performance    

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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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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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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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A pre-compensation method of the systematic contouring error for repetitive command paths

ZHANG,Y. H. CHEN,Y. P. CHEN

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 4,   Pages 367-372 doi: 10.1007/s11465-015-0367-5

Abstract:

For a repetitive command path, pre-compensating the contouring error by modifying the command path is practical. To obtain the pre-compensation value with better accuracy, this paper proposes the use of a back propagation neural network to extract the function of systematic contouring errors. Furthermore, by using the extracted function, the contouring error can be easily pre-compensated. The experiment results verify that the proposed compensation method can effectively reduce contouring errors.

Keywords： contouring error     pre-compensation     motion control system     back propagation (BP) neural network    

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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 implementation

Keywords： FAU     hierarchical zeolite     layer-like morphology    

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Research on the valveless piezoelectric pump with Y-shape pipes

ZHANG Jianhui, LU Jizhuang, XIA Qixiao

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 2,   Pages 144-151 doi: 10.1007/s11465-007-0024-8

Abstract: A piezoelectric pump with its Y-shape elements is presented.Two Y-shape pipes are fixed outside the chamber serving as an inlet and outlet, with the chamber andEddies occurring in the Y-shape elements are smaller, which is beneficial for the transport of living

Keywords： chamber serving     beneficial     working frequency     long-link     correction    

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Title Author Date Type Operation

Phosphorous removal from wastewater by lanthanum modified Y zeolites

Weikang ZHANG, Ye TIAN

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

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

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

Anion-exchange membrane direct ethanol fuel cells: Status and perspective

Zhao, Y.S. Li, S.Y. Shen

Journal Article

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

Jie ZHU, Xiangju MENG, Fengshou XIAO

Journal Article

Fabrication of titanosilicate pillared MFI zeolites with tailored catalytic activity

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

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

A pre-compensation method of the systematic contouring error for repetitive command paths

ZHANG,Y. H. CHEN,Y. P. CHEN

Journal Article

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

Bastian Reiprich, Tobias Weissenberger, Wilhelm Schwieger, Alexandra Inayat

Journal Article

Research on the valveless piezoelectric pump with Y-shape pipes

ZHANG Jianhui, LU Jizhuang, XIA Qixiao

Journal Article