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Control of aluminum distribution in ZSM-5 zeolite for enhancement of its catalytic performance for propane

Frontiers of Chemical Science and Engineering doi: 10.1007/s11705-024-2439-8

Abstract: Regulation of aluminum distribution in zeolite framework is an effective method for improving its catalyticAs a result, the hollow-structured ZSM-5 zeolite with more paired aluminum (H-200-hollow) showed higher

Keywords： propane aromatization     zeolite     aluminum distribution     recrystallization and post-realuminization    

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Factors affecting the formation of zeolite seed layers and the effects of seed layers on the growth ofzeolite silicalite-1 membranes

ZHANG Xiongfu, WANG Jinqu, LIU Hai′ou, WANG Anjie

Frontiers of Chemical Science and Engineering 2007, Volume 1, Issue 2,   Pages 172-177 doi: 10.1007/s11705-007-0032-6

Abstract: With this method of seeded secondary synthesis of zeolite membranes, the quality of a membrane mainly

Keywords： silicalite-1     α-A1O     growth     seeding ethanol     quality    

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Synthesis, physicochemical characterizations and catalytic performance of Pd/carbon-zeolite and Pd/carbon-CeO

Zeinab JAMALZADEH, Mohammad HAGHIGHI, Nazli ASGARI

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 3,   Pages 365-381 doi: 10.1007/s11783-013-0520-5

Abstract: work, xylene removal from waste gas streams was investigated via catalytic oxidation over Pd/carbon-zeoliteNatural zeolite of clinoptilolite was modified by acid treatment with HCl, while nano-ceria was synthesizedMixed supports of carbon-zeolite and carbon-ceria were prepared and palladium was dispersed over them

Keywords： Pd/carbon-CeO2     Pd/carbon-zeolite     pine cone     ZnCl2     catalytic oxidation     xylene    

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Mechanistic insights into the synergetic remediation and amendment effects of zeolite/biochar composite

Frontiers of Environmental Science & Engineering doi: 10.1007/s11783-024-1874-6

Abstract:

● Converting of red soil into a zeolite framework has been reported

Keywords： Red soil     Heavy metal pollution     Zeolite/biochar composite     Soil remediation     Soil amendment    

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Catalytic fast pyrolysis of Kraft lignin with HZSM-5 zeolite for producing aromatic hydrocarbons

Xiangyu LI, Lu SU, Yujue WANG, Yanqing YU, Chengwen WANG, Xiaoliang LI, Zhihua WANG

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 3,   Pages 295-303 doi: 10.1007/s11783-012-0410-2

Abstract: Catalytic fast pyrolysis (CFP) of Kraft lignins with HZSM-5 zeolite for producing aromatics was investigated

Keywords： lignin     catalytic fast pyrolysis     HZSM-5     zeolite     aromatic hydrocarbon    

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Photocatalytic degradation of omethoate using NaY zeolite-supported TiO

Dishun ZHAO, Jialei WANG, Zhigang ZHANG, Juan ZHANG

Frontiers of Chemical Science and Engineering 2009, Volume 3, Issue 2,   Pages 206-210 doi: 10.1007/s11705-009-0053-4

Abstract: The degradation of omethoate was conducted using H O as oxidant, TiO supported on NaY zeolite as photocatalystThe effect of the calcination temperature of the photocatalyst, the amount of TiO loaded on NaY zeoliteThe results show that TiO /NaY zeolite photocatalyst prepared by sol-gel method had good photocatalysisfollows: the calcination temperature of the photocatalyst is 550°C,the amount of TiO loaded on NaY zeolite

Keywords： TiO2     NaY zeolite     photocatalytic degradation     omethoate    

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Metal size effects over metal/zeolite bifunctional catalysts in the selective hydroalkylation of benzene

Frontiers of Chemical Science and Engineering 2024, Volume 18, Issue 4, doi: 10.1007/s11705-024-2406-4

Abstract: Bifunctional metal/zeolite materials are some of the most suitable catalysts for the direct hydroalkylationthis work, we successfully synthesized Ru and Pd nanoparticles on Sinopec Composition Materials No.1 zeoliteWe demonstrated the size-dependent catalytic activity of zeolite-supported Ru and Pd catalysts in theinto the hydroalkylation reaction and may open up a new avenue for the smart design of advanced metal/zeolite

Keywords： size effects     bifunctional catalysts     metal/zeolite     hydroalkylation    

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CuO/zeolite catalyzed oxidation of gaseous toluene under microwave heating

Longli BO, Jianbo LIAO, Yucai ZHANG, Xiaohui WANG, Quan YANG

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 3,   Pages 395-402 doi: 10.1007/s11783-012-0417-8

Abstract: typical toxic volatile organic compound, was oxidized through a fixed bed reaction chamber containing zeolite-supportedcopper oxide (CuO/zeolite) catalyst mixed with silicon carbide (SiC), an excellent microwave-absorbing

Keywords： microwave     catalytic oxidation     CuO/zeolite catalyst     silicon carbide (SiC)     toluene    

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Effects of natural zeolite and sulfate ions on the mechanical properties and microstructure of plastic

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 1,   Pages 86-98 doi: 10.1007/s11709-021-0793-x

Abstract: Natural zeolite (NZ) is a relatively abundant mineral resource and in this research, the microstructureResults showed that increasing the zeolite content decreases the unconfined strength, elastic modulusHowever, at the later ages, increasing the zeolite content increases unconfined strength as well as the

Keywords： plastic concrete     sulfate resistance     natural zeolite     triaxial compression test     SEM     permeability    

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Post-treatment of Ti-MWW zeolite with potassium fluoride for propylene epoxidation

Frontiers of Chemical Science and Engineering doi: 10.1007/s11705-024-2441-1

Abstract: Epoxidation of propylene to propylene oxide (PO) with hydrogen peroxide (HPPO) is an environmentally friendly and cost-efficient process in which titanosilicates are used as catalysts. Ti-MWW is a potential industrial catalyst for this process, which involves the addition of HPPO to PO. The silanol groups generated during secondary crystallization unavoidably result in ring-opening of PO and inefficient decomposition of HPPO, which diminish the PO selectivity and the lifespan of Ti-MWW. To address this issue, we conducted post-treatment modifications of the structured Bf-Ti-MWW catalyst with potassium fluoride aqueous solutions. By quenching the silanol groups with potassium fluoride and implanting electron-withdrawing fluoride groups into the Ti-MWW framework, both the catalytic activity and HPPO utilization efficiency were increased. Moreover, the ring opening reaction of PO was prohibited. In a continuous fixed-bed liquid-phase propylene epoxidation reaction, the KF-treated structured Ti-MWW catalyst displayed an exceptionally long lifespan of 2700 h, with a PO yield of 590 g·kg−1·h−1.

Keywords： titanosilicates     Ti-MWW     propylene epoxidation     structured catalyst     KF modification    

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Biodiesel production from waste frying oil in sub- and supercritical methanol on a zeolite Y solid acid

Jorge MEDINA-VALTIERRA, Jorge RAMIREZ-ORTIZ

Frontiers of Chemical Science and Engineering 2013, Volume 7, Issue 4,   Pages 401-407 doi: 10.1007/s11705-013-1354-1

Abstract: In this study biodiesel was produced from WFO in sub- and super-critical methanol on a zeolite Y solidThe transesterification of WFO with methanol around its critical temperature combined with a zeolite

Keywords： biodiesel     methanol     critical temperature     waste frying oil     zeolite Y    

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Atomistic simulations for adsorption and separation of flue gas in MFI zeolite and MFI/MCM-41 micro/mesoporous

Shengchi ZHUO, Yongmin HUANG, Jun HU, Honglai LIU

Frontiers of Chemical Science and Engineering 2011, Volume 5, Issue 2,   Pages 264-273 doi: 10.1007/s11705-010-1007-6

Abstract: Adsorption of pure CO and N and separation of CO /N mixture in MFI zeolite and MFI/MCM-41 micro/mesoporous

Keywords： adsorption     diffusion     CO2     flue gas     zeolite     micro/mesoporous composite    

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Hierarchical ZSM-5 zeolite with radial mesopores: Preparation, formation mechanism and application for

Darui Wang, Hongmin Sun, Wei Liu, Zhenhao Shen, Weimin Yang

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 2,   Pages 248-257 doi: 10.1007/s11705-019-1853-9

Abstract: Hierarchical ZSM-5 zeolite with radial mesopores is controllably synthesized using piperidine in a NaOHThe piperidine molecules enter the zeolite micropores and protect the zeolite framework from extensiveIn this manner, radial mesopores are formed in the ZSM-5 zeolite with a maximal preservation of the microporesThe optimal hierarchical ZSM-5 zeolite, prepared with a molar ratio of piperidine to zeolite of 0.03,Compared to the parent zeolite, the hierarchical ZSM-5 zeolite possesses more accessible acid sites and

Keywords： hierarchical ZSM-5 zeolite     protective desilication     piperidine     radial mesopores     benzene alkylation    

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Effect of seawater salinity on the synthesis of zeolite from coal fly ash

Yanqing YU, Xiaoliang LI, Xiaolan ZOU, Xiaobin ZHU

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 1,   Pages 54-61 doi: 10.1007/s11783-013-0493-4

Abstract: A novel method for the synthesis of zeolite was developed in this paper.Seawater salinity was varied from 32 to 88 for zeolite crystallization during the hydrothermal processThe results show that seawater salinity plays an important role in zeolite synthesis with CFA duringThe products were a mixture of NaX zeolite and hydroxysodalite; seawater salinity more strongly affectedmethod allows for the efficient disposal of by-products; therefore, the application of seawater in zeolite

Keywords： coal fly ash (CFA)     seawater salinity     zeolite synthesis    

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The interaction of the structure-directing agent with the zeolite framework determines germanium distribution

Frontiers of Chemical Science and Engineering 2024, Volume 18, Issue 5, doi: 10.1007/s11705-024-2417-1

Abstract: framework and the orientation of the structure directing agent (SDA) molecules in the as-synthesized zeoliteThe calculated relative energies of the bare zeolite framework suggest that structures with germaniumThe simulations of various orientations of the SDA in the pores of the germanosilicate zeolite show different

Keywords： zeolite     density functional theory     structure-directing agent     SCM-15    

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Title Author Date Type Operation

Control of aluminum distribution in ZSM-5 zeolite for enhancement of its catalytic performance for propane

Journal Article

Factors affecting the formation of zeolite seed layers and the effects of seed layers on the growth ofzeolite silicalite-1 membranes

ZHANG Xiongfu, WANG Jinqu, LIU Hai′ou, WANG Anjie

Journal Article

Synthesis, physicochemical characterizations and catalytic performance of Pd/carbon-zeolite and Pd/carbon-CeO

Zeinab JAMALZADEH, Mohammad HAGHIGHI, Nazli ASGARI

Journal Article

Mechanistic insights into the synergetic remediation and amendment effects of zeolite/biochar composite

Journal Article

Catalytic fast pyrolysis of Kraft lignin with HZSM-5 zeolite for producing aromatic hydrocarbons

Xiangyu LI, Lu SU, Yujue WANG, Yanqing YU, Chengwen WANG, Xiaoliang LI, Zhihua WANG

Journal Article

Photocatalytic degradation of omethoate using NaY zeolite-supported TiO

Dishun ZHAO, Jialei WANG, Zhigang ZHANG, Juan ZHANG

Journal Article

Metal size effects over metal/zeolite bifunctional catalysts in the selective hydroalkylation of benzene

Journal Article

CuO/zeolite catalyzed oxidation of gaseous toluene under microwave heating

Longli BO, Jianbo LIAO, Yucai ZHANG, Xiaohui WANG, Quan YANG

Journal Article

Effects of natural zeolite and sulfate ions on the mechanical properties and microstructure of plastic

Journal Article

Post-treatment of Ti-MWW zeolite with potassium fluoride for propylene epoxidation

Journal Article

Biodiesel production from waste frying oil in sub- and supercritical methanol on a zeolite Y solid acid

Jorge MEDINA-VALTIERRA, Jorge RAMIREZ-ORTIZ

Journal Article

Atomistic simulations for adsorption and separation of flue gas in MFI zeolite and MFI/MCM-41 micro/mesoporous

Shengchi ZHUO, Yongmin HUANG, Jun HU, Honglai LIU

Journal Article

Hierarchical ZSM-5 zeolite with radial mesopores: Preparation, formation mechanism and application for

Darui Wang, Hongmin Sun, Wei Liu, Zhenhao Shen, Weimin Yang

Journal Article

Effect of seawater salinity on the synthesis of zeolite from coal fly ash

Yanqing YU, Xiaoliang LI, Xiaolan ZOU, Xiaobin ZHU

Journal Article

The interaction of the structure-directing agent with the zeolite framework determines germanium distribution

Journal Article