Synthesis, characteristics of hierarchical EU-1 zeolite for xylene isomerization probe reaction

doi:10.1016/j.cjche.2016.05.002

Chinese Journal of Chemical Engineering ›› 2016, Vol. 24 ›› Issue (11): 1577-1583.DOI: 10.1016/j.cjche.2016.05.002

• 第25届中国过程控制会议专栏 • 上一篇下一篇

Synthesis, characteristics of hierarchical EU-1 zeolite for xylene isomerization probe reaction

Xiaofeng Li¹, Pengchao Ren¹, Yanting Zhang¹, Xiaozhen Liu¹, Xiaotao Sun¹, Meng Gao¹, Miaojuan Jia¹, Zhiping Lü¹, Tao Dou^1,2

1 Research Institute of Special Chemicals, Taiyuan University of Technology, Taiyuan 030024, China;
2 CNPC Key Laboratory of Catalysis, College of Chemical Engineering, China University of Petroleum, Beijing 102249, China

收稿日期:2016-01-28 修回日期:2016-05-04 出版日期:2016-11-28 发布日期:2016-12-06
通讯作者: Xiaofeng Li, Tao Dou
基金资助:
Supported by the National Innovation Fund for Small andMedium-sized Technologybased Firms (14C₂6211400552).

Synthesis, characteristics of hierarchical EU-1 zeolite for xylene isomerization probe reaction

Xiaofeng Li¹, Pengchao Ren¹, Yanting Zhang¹, Xiaozhen Liu¹, Xiaotao Sun¹, Meng Gao¹, Miaojuan Jia¹, Zhiping Lü¹, Tao Dou^1,2

1 Research Institute of Special Chemicals, Taiyuan University of Technology, Taiyuan 030024, China;
2 CNPC Key Laboratory of Catalysis, College of Chemical Engineering, China University of Petroleum, Beijing 102249, China

Received:2016-01-28 Revised:2016-05-04 Online:2016-11-28 Published:2016-12-06
Contact: Xiaofeng Li, Tao Dou
Supported by:
Supported by the National Innovation Fund for Small andMedium-sized Technologybased Firms (14C₂6211400552).

摘要/Abstract

摘要： Introduced amethod of synthesizing hierarchical EU-1 zeolitewith organosilanes as additive, and studied the influences of following different kinds of organosilanes on the synthesis of hierarchical EU-1 zeolite:γ-glycidoxy propyl trimethoxy silane (GPTMS), N-β-(aminoethyl)-γ-aminopropyl methyl dimethoxyl silane (APAEDMS), and N-(β-aminoethyl)-γ-aminopropyl dimethoxyl (ethyoxyl) silane (TMPED). The hierarchical EU-1 samples were characterized by XRD, SEM,N₂ adsorption, FT-IR and NH₃-TPD to analyze the crystallinity,morphology, surface area, pore size distribution and acidity. The results showed that hierarchical EU-1 zeolites were successfully synthesized; organosilanes have great influence on crystal morphology of EU-1 zeolites; the exterior surface area of hierarchical EU-1 zeolite, which synthesized with organosilanes (APAEDMS) adding into synthesis system, increased by 62.1% andmesopore volume increased by 129.1% comparedwith conventional EU-1 zeolites, thus can reduce the diffusional restriction markedly in catalytic reaction. The catalytic performance of hierarchical EU-1 zeolites were evaluated in m-xylene isomerization on fixed bed reactor. The catalytic data showed that the isomerization activity PX/X of the hierarchical EU-1 zeolites reached around 24.09% in theoretical thermodynamic equilibrium from 23.83%, and the selectivity of C₈ aromatic hydrocarbon increased from 75.16% to 84.87%. The conversion of p-xylene increased from 16.30% to 18.41%.

关键词: EU-1, Zeolite, Hierarchical pore, Synthesis, Catalysis

Abstract: Introduced amethod of synthesizing hierarchical EU-1 zeolitewith organosilanes as additive, and studied the influences of following different kinds of organosilanes on the synthesis of hierarchical EU-1 zeolite:γ-glycidoxy propyl trimethoxy silane (GPTMS), N-β-(aminoethyl)-γ-aminopropyl methyl dimethoxyl silane (APAEDMS), and N-(β-aminoethyl)-γ-aminopropyl dimethoxyl (ethyoxyl) silane (TMPED). The hierarchical EU-1 samples were characterized by XRD, SEM,N₂ adsorption, FT-IR and NH₃-TPD to analyze the crystallinity,morphology, surface area, pore size distribution and acidity. The results showed that hierarchical EU-1 zeolites were successfully synthesized; organosilanes have great influence on crystal morphology of EU-1 zeolites; the exterior surface area of hierarchical EU-1 zeolite, which synthesized with organosilanes (APAEDMS) adding into synthesis system, increased by 62.1% andmesopore volume increased by 129.1% comparedwith conventional EU-1 zeolites, thus can reduce the diffusional restriction markedly in catalytic reaction. The catalytic performance of hierarchical EU-1 zeolites were evaluated in m-xylene isomerization on fixed bed reactor. The catalytic data showed that the isomerization activity PX/X of the hierarchical EU-1 zeolites reached around 24.09% in theoretical thermodynamic equilibrium from 23.83%, and the selectivity of C₈ aromatic hydrocarbon increased from 75.16% to 84.87%. The conversion of p-xylene increased from 16.30% to 18.41%.

Key words: EU-1, Zeolite, Hierarchical pore, Synthesis, Catalysis

Xiaofeng Li, Pengchao Ren, Yanting Zhang, Xiaozhen Liu, Xiaotao Sun, Meng Gao, Miaojuan Jia, Zhiping Lü, Tao Dou. Synthesis, characteristics of hierarchical EU-1 zeolite for xylene isomerization probe reaction[J]. Chinese Journal of Chemical Engineering, 2016, 24(11): 1577-1583.

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Synthesis, characteristics of hierarchical EU-1 zeolite for xylene isomerization probe reaction

Synthesis, characteristics of hierarchical EU-1 zeolite for xylene isomerization probe reaction

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