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Issue 8, 2016
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The effect of Si/Al ratio on the catalytic performance of hierarchical porous ZSM-5 for catalyzing benzene alkylation with methanol

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Abstract

Ethylbenzene is the major side product in benzene alkylation with methanol and it is difficult to be suppressed over hierarchical porous ZSM-5. Moreover, the separation of ethylbenzene from xylene still remains a great challenge. Our research indicated that ethylbenzene formation could be highly suppressed by changing the Si/Al ratio of the catalyst. Hierarchical porous ZSM-5 catalysts with different Si/Al ratios were prepared via reducing the amount of Al in the solvent evaporation assisted dry gel conversion method. In this method, tetra-n-propylammonium hydroxide was used as the direct agent to create micropores, and hexadecyltrimethoxysilane was added to create additional porosities by forming organic assemblies which occupied a certain space between zeolitic walls. The catalyst with a Si/Al ratio of 1800 could achieve high benzene conversion (59.5%) and high xylene selectivity (39.0%) as well as excellent suppression of ethylbenzene formation (<0.1%).

Graphical abstract: The effect of Si/Al ratio on the catalytic performance of hierarchical porous ZSM-5 for catalyzing benzene alkylation with methanol

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Publication details

The article was received on 18 Nov 2015, accepted on 16 Jan 2016 and first published on 18 Jan 2016


Article type: Paper
DOI: 10.1039/C5CY01976A
Citation: Catal. Sci. Technol., 2016,6, 2647-2652
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    The effect of Si/Al ratio on the catalytic performance of hierarchical porous ZSM-5 for catalyzing benzene alkylation with methanol

    H. Hu, J. Lyu, J. Rui, J. Cen, Q. Zhang, Q. Wang, W. Han and X. Li, Catal. Sci. Technol., 2016, 6, 2647
    DOI: 10.1039/C5CY01976A

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