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A Facile Strategy to Prepare Shaped ZSM-5 Catalysts with Enhanced Para-Xylene Selectivity and Stability for Toluene Methylation: The Effect of In Situ Modification by Attapulgite.
Molecules. 2019 Sep 24; 24(19)M

Abstract

A general strategy for preparing shaped toluene methylation catalysts with enhanced para-selectivity and stability is developed by extruding ZSM-5 zeolite with attapulgite as a binder. The novel attapulgite/ZSM-5 extrudate exhibited significantly higher para-selectivity and stability in comparison to the conventional alumina-bound ZSM-5 extrudate. The catalyst samples have been characterized by in situ X-ray diffraction, scanning electron microscope (SEM), NH3 temperature programmed desorption (TPD), thermogravimetric analysis (TGA) as well as n-hexane/cyclohexane physical adsorption. The enhanced catalytic performance of attapulgite/ZSM-5 extrudate is correlated with the in-situ modification of acid sites in the catalyst by mobile alkaline species, which is introduced via extrusion with attapulgite. Moreover, a higher para-selectivity was obtained over attapulgite-bound modified ZSM-5 extrudate. Such facile and universal strategy of extruding ZSM-5 catalysts with attapulgite as binder could pave a way for preparation of shaped zeolite-base catalyst with enhanced catalytic performance.

Authors+Show Affiliations

State Key Laboratory of Fine Chemicals, PSU-DUT Joint Center for Energy Research, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China. wangyr@mail.dlut.edu.cn.State Key Laboratory of Fine Chemicals, PSU-DUT Joint Center for Energy Research, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China. changyang@cnooc.com.cn.State Key Laboratory of Fine Chemicals, PSU-DUT Joint Center for Energy Research, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China. lium@dlut.edu.cn.State Key Laboratory of Fine Chemicals, PSU-DUT Joint Center for Energy Research, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China. zhangaf@dlut.edu.cn.State Key Laboratory of Fine Chemicals, PSU-DUT Joint Center for Energy Research, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China. guoxw@dlut.edu.cn.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31554209

Citation

Wang, Yiren, et al. "A Facile Strategy to Prepare Shaped ZSM-5 Catalysts With Enhanced Para-Xylene Selectivity and Stability for Toluene Methylation: the Effect of in Situ Modification By Attapulgite." Molecules (Basel, Switzerland), vol. 24, no. 19, 2019.
Wang Y, Chang Y, Liu M, et al. A Facile Strategy to Prepare Shaped ZSM-5 Catalysts with Enhanced Para-Xylene Selectivity and Stability for Toluene Methylation: The Effect of In Situ Modification by Attapulgite. Molecules. 2019;24(19).
Wang, Y., Chang, Y., Liu, M., Zhang, A., & Guo, X. (2019). A Facile Strategy to Prepare Shaped ZSM-5 Catalysts with Enhanced Para-Xylene Selectivity and Stability for Toluene Methylation: The Effect of In Situ Modification by Attapulgite. Molecules (Basel, Switzerland), 24(19). https://doi.org/10.3390/molecules24193462
Wang Y, et al. A Facile Strategy to Prepare Shaped ZSM-5 Catalysts With Enhanced Para-Xylene Selectivity and Stability for Toluene Methylation: the Effect of in Situ Modification By Attapulgite. Molecules. 2019 Sep 24;24(19) PubMed PMID: 31554209.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - A Facile Strategy to Prepare Shaped ZSM-5 Catalysts with Enhanced Para-Xylene Selectivity and Stability for Toluene Methylation: The Effect of In Situ Modification by Attapulgite. AU - Wang,Yiren, AU - Chang,Yang, AU - Liu,Min, AU - Zhang,Anfeng, AU - Guo,Xinwen, Y1 - 2019/09/24/ PY - 2019/08/26/received PY - 2019/09/17/revised PY - 2019/09/22/accepted PY - 2019/9/27/entrez PY - 2019/9/27/pubmed PY - 2020/2/8/medline KW - attapulgite KW - binder KW - para-xylene selectivity KW - stability KW - toluene methylation KW - zeolite extrudates JF - Molecules (Basel, Switzerland) JO - Molecules VL - 24 IS - 19 N2 - A general strategy for preparing shaped toluene methylation catalysts with enhanced para-selectivity and stability is developed by extruding ZSM-5 zeolite with attapulgite as a binder. The novel attapulgite/ZSM-5 extrudate exhibited significantly higher para-selectivity and stability in comparison to the conventional alumina-bound ZSM-5 extrudate. The catalyst samples have been characterized by in situ X-ray diffraction, scanning electron microscope (SEM), NH3 temperature programmed desorption (TPD), thermogravimetric analysis (TGA) as well as n-hexane/cyclohexane physical adsorption. The enhanced catalytic performance of attapulgite/ZSM-5 extrudate is correlated with the in-situ modification of acid sites in the catalyst by mobile alkaline species, which is introduced via extrusion with attapulgite. Moreover, a higher para-selectivity was obtained over attapulgite-bound modified ZSM-5 extrudate. Such facile and universal strategy of extruding ZSM-5 catalysts with attapulgite as binder could pave a way for preparation of shaped zeolite-base catalyst with enhanced catalytic performance. SN - 1420-3049 UR - https://www.unboundmedicine.com/medline/citation/31554209/A_Facile_Strategy_to_Prepare_Shaped_ZSM-5_Catalysts_with_Enhanced_Para-Xylene_Selectivity_and_Stability_for_Toluene_Methylation:_The_Effect_of_In_Situ_Modification_by_Attapulgite L2 - https://www.mdpi.com/resolver?pii=molecules24193462 DB - PRIME DP - Unbound Medicine ER -