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Insights into the Organotemplate-Free Synthesis of Zeolite Catalysts

Yeqing Wang,Qinming Wu,Xiangju Meng,Feng-Shou Xiao

Engineering 2017, Volume 3, Issue 4,   Pages 567-574 doi: 10.1016/J.ENG.2017.03.029

Abstract: summarizes the role of organic templates and describes designed routes for the organotemplate-free synthesisof zeolites, aided by zeolite seeds and zeolite seeds solution.that the micropore volume decreases with an increase of the Si/Al ratios in the organotemplate-free synthesisof zeolite products, where Na+ exists as an alkali cation.This feature is very important in directing the synthesis of zeolite catalysts with controllable Si/Al

Keywords： Zeolite seed-directed synthesis     Organotemplate-free synthesis     Zeolite seeds solution     Si/Al ratios     Zeolite    

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Seed-induced synthesis of functional MFI zeolite materials: Method development, crystallization mechanisms

Zhaoqi Ye, Hongbin Zhang, Yahong Zhang, Yi Tang

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 2,   Pages 143-158 doi: 10.1007/s11705-019-1852-x

Abstract: As an important zeolite material, MFI zeolites, as well as their controllable synthesis, are of greatAmong the developed synthetic approaches, the seed-induced method has gradually evolved into a facilealso function as special “templates” or “units” to fine-tune the zeolite materials with diverse sizesMoreover, on the basis of their structural features and crystallization behaviors in seed-induced synthesisto guide readers to investigate the structure-performance relationships between these functional MFI zeolite

Keywords： seed-induced synthesis     MFI zeolite     synthesis mechanism     catalytic property    

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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: The effects of support property, seed size and solvent on the formation of seed layers were investigatedThe growth of silicalite-1 membranes on different seeded supports by hydrothermal synthesis was alsoAt a longer contact time, a seed layer can also be formed using 100 nm seed on the supports with largerThe seed layers and membranes grown from the smaller seed are more uniform and continuous and possessWith 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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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.The synthesis was carried out by hydrothermal activation after alkali fusion and coal fly ash (CFA) wasSeawater 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 duringsynthesis presents promising economic and ecological benefits.

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

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Novel seed-assisted synthesis of indium tin oxide submicro-cubes and their resistivity

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 5,   Pages 557-569 doi: 10.1007/s11705-022-2249-9

Abstract: Herein, low-resistivity indium tin oxide submicro-cubes are synthesized by a seed-assisted coprecipitationThe effects of seed content, In3+ concentration, aging time, reaction temperature and calcinationThe presence of seed particles provided nucleation sites with lower energy barriers and promoted formationThe seed-assisted synthesis provides a novel way to prepare low-resistivity indium tin oxide submicro-cubes

Keywords： indium tin oxide     submicro-cubes     resistivity     seed-assisted coprecipitation method     orthogonal experiment    

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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 themgroups of synthesized catalysts are in good agreement with the patterns of materials applied in catalyst synthesis

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

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Using ultrasound to improve the sequential post-synthesis modification method for making mesoporous Y

Rongxin Zhang, Peinan Zhong, Hamidreza Arandiyan, Yanan Guan, Jinmin Liu, Na Wang, Yilai Jiao, Xiaolei Fan

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 2,   Pages 275-287 doi: 10.1007/s11705-019-1905-1

Abstract: For example, after the treatment of a dealuminated zeolite Y (using 0.1 mol·L H EDTA at 100°C for 6h), the ultrasonic treatment produced the mesoporous zeolite Y with the specific external surface areachemical dealumination treatment was crucial to enable the effective creation of mesopores in the parent Y zeolite

Keywords： zeolite Y     mesoporous zeolite     post-synthesis treatment     ultrasound     chemical dealumination treatment     alkaline    

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Porous silica synthesis out of coal fly ash with no residue generation and complete silicon separation

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 9, doi: 10.1007/s11783-023-1712-2

Abstract:

● Both amorphous and crystalline silicon are completely separated from coal fly ash.

Keywords： Coal fly ash     Alkali fusion     Micro-/meso-porous Si     Zeolite MCM-48     Crystalline transformation    

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Organosilane surfactant-assisted synthesis of mesoporous SSZ-39 zeolite with enhanced catalytic performance

Hao Xu, Chi Lei, Qinming Wu, Qiuyan Zhu, Xiangju Meng, Daniel Dai, Stefan Maurer, Andrei-Nicolae Parvulescu, Ulrich Müller, Fengshou Xiao

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 2,   Pages 267-274 doi: 10.1007/s11705-019-1845-9

Abstract: SSZ-39 zeolite with AEI framework structure is a good catalyst candidate for the methanol-to-olefinsHowever, the diffusion limitation and coke formation often results in fast deactivation of the SSZ-39 zeoliteOne solution for this challenge is to introduce mesoporosity in the SSZ-39 zeolite.Herein, we report the synthesis of mesoporous SSZ-39 zeolite using an organosilane surfactant, , -dimethylThe results show that the mesoporous SSZ-39 zeolite has high crystallinity, meso/microporosity, high

Keywords： SSZ-39 zeolite     mesopores     organosilane surfactant     MTO reaction     soft template     mass transfer    

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Synthesis, characterization and catalytic properties of mesoporous MCM-48 containing zeolite secondary

LI Qiang, ZHANG Ying, DOU Tao, LI Yuping, WANG Shan, SUN Famin

Frontiers of Chemical Science and Engineering 2007, Volume 1, Issue 1,   Pages 1-5 doi: 10.1007/s11705-007-0001-0

Abstract: Mesoporous aluminosilicate MCM-48 containing zeolite secondary building units in the pore wall has beenThe aluminosilicate precursors comprising zeolite secondary building units were first synthesized byadsorption band at 520 600 cm in its FT-IR spectrum, which was assigned to five-membered ring vibration from zeoliteThis suggested the presence of zeolite building units in the pore wall.

Keywords： diameter     mesostructured MCM-48     Catalytic     presence     five-membered    

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Synthesis of zeolite Na-P1 from coal fly ash produced by gasification and its application as adsorbent

Yixin Zhang, Lu Zhou, Liqing Chen, Yang Guo, Fanhui Guo, Jianjun Wu, Baiqian Dai

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 3,   Pages 518-527 doi: 10.1007/s11705-020-1926-9

Abstract: paper, the coal fly ash produced by gasification was at first analyzed and then applied to synthesize zeoliteThe effects of synthesis conditions on the cation exchange capacity (CEC) of zeolite were investigatedX-ray diffraction and scanning electron microscope indicated that the crystallinity of the synthesized zeoliteWhen the synthesized zeolite with the highest CEC (275.5 meq/100 g) was used for the adsorption of Cr

Keywords： coal fly ash     gasification     zeolite     Na-P1     chromium(VI)    

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Advances in the study of directed evolution for cellulases

Hailong LIN, Weiguang LI, Changhong GUO, Sihang QU, Nanqi REN

Frontiers of Environmental Science & Engineering 2011, Volume 5, Issue 4,   Pages 519-525 doi: 10.1007/s11783-011-0326-2

Abstract: Application of directed evolution technology may be one of the most effective ways for improving thehydrolysis mechanism by cellulase, advances in cellulases (endoglucanase and -glucosidase) improvement by directedcharacteristics (for instance, thermal stability, pH adaptability and enzyme activity), limitations of directedevolution for cellulases, and the outlook for directed evolution for cellulase.

Keywords： biohydrogen     bioethanol     cellulase     cellulose     directed evolution    

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Influence of harvest date on seed yield and quality in forage kochia

Cody F. CREECH, Blair L. WALDRON, Corey V. RAMSOM, Dale R. ZOBELL, Joseph Earl CREECH

Frontiers of Agricultural Science and Engineering 2018, Volume 5, Issue 1,   Pages 71-79 doi: 10.15302/J-FASE-2017196

Abstract: rangeland reclamation and livestock and wildlife forage, but limited research has been conducted on its seedTherefore, this research evaluated the effect of harvest date on seed weight, germination, and seed yieldSeed was harvested from individual plants for 3 years during October, November, and December., had the greatest 100-seed weights in November, 155 and 143 mg, respectively, whereas, cv.Immigrant (subsp. ), the standard for forage kochia, ranked among the least for 100-seed weight.

Keywords： forage     rangeland     seed germination     seed quality    

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Unnormalized and normalized forms of gefura measures in directed and undirected networks

Raf GUNS,Ronald ROUSSEAU

Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 4,   Pages 311-320 doi: 10.1631/FITEE.1400425

Abstract: latter normalizes at the level of nodes. (2) Treating undirected networks as equivalent to symmetric directednetworks, we expand the definition of gefura measures to the directed case. (3) It is shown how Brandes

Keywords： Networks subdivided in groups     Partitions     Gefura measures     Q-measures     Brokerage role     Directed and    

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Controllability analysis of second-ordermulti-agent systemswith directed andweighted interconnection

Di GUO,Rong-hao ZHENG,Zhi-yun LIN,Gang-feng YAN

Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 10,   Pages 838-847 doi: 10.1631/FITEE.1500069

Abstract: Each agent is assumed to be governed by a second-order consensus control law corresponding to a directedThe first is concerned with directed trees, which represent the class of topology with minimum informationThe second is concerned with a more general graph that can be reduced to a directed tree by contracting

Keywords： Multi-agent systems     Controllability     Directed tree    

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Title Author Date Type Operation

Insights into the Organotemplate-Free Synthesis of Zeolite Catalysts

Yeqing Wang,Qinming Wu,Xiangju Meng,Feng-Shou Xiao

Journal Article

Seed-induced synthesis of functional MFI zeolite materials: Method development, crystallization mechanisms

Zhaoqi Ye, Hongbin Zhang, Yahong Zhang, Yi Tang

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

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

Yanqing YU, Xiaoliang LI, Xiaolan ZOU, Xiaobin ZHU

Journal Article

Novel seed-assisted synthesis of indium tin oxide submicro-cubes and their resistivity

Journal Article

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

Zeinab JAMALZADEH, Mohammad HAGHIGHI, Nazli ASGARI

Journal Article

Using ultrasound to improve the sequential post-synthesis modification method for making mesoporous Y

Rongxin Zhang, Peinan Zhong, Hamidreza Arandiyan, Yanan Guan, Jinmin Liu, Na Wang, Yilai Jiao, Xiaolei Fan

Journal Article

Porous silica synthesis out of coal fly ash with no residue generation and complete silicon separation

Journal Article

Organosilane surfactant-assisted synthesis of mesoporous SSZ-39 zeolite with enhanced catalytic performance

Hao Xu, Chi Lei, Qinming Wu, Qiuyan Zhu, Xiangju Meng, Daniel Dai, Stefan Maurer, Andrei-Nicolae Parvulescu, Ulrich Müller, Fengshou Xiao

Journal Article

Synthesis, characterization and catalytic properties of mesoporous MCM-48 containing zeolite secondary

LI Qiang, ZHANG Ying, DOU Tao, LI Yuping, WANG Shan, SUN Famin

Journal Article

Synthesis of zeolite Na-P1 from coal fly ash produced by gasification and its application as adsorbent

Yixin Zhang, Lu Zhou, Liqing Chen, Yang Guo, Fanhui Guo, Jianjun Wu, Baiqian Dai

Journal Article

Advances in the study of directed evolution for cellulases

Hailong LIN, Weiguang LI, Changhong GUO, Sihang QU, Nanqi REN

Journal Article

Influence of harvest date on seed yield and quality in forage kochia

Cody F. CREECH, Blair L. WALDRON, Corey V. RAMSOM, Dale R. ZOBELL, Joseph Earl CREECH

Journal Article

Unnormalized and normalized forms of gefura measures in directed and undirected networks

Raf GUNS,Ronald ROUSSEAU

Journal Article

Controllability analysis of second-ordermulti-agent systemswith directed andweighted interconnection

Di GUO,Rong-hao ZHENG,Zhi-yun LIN,Gang-feng YAN

Journal Article