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Aromatization of ethylene over zeolite-based catalysts

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Abstract

Light aromatic compounds (BTX: benzene, toluene and xylenes) represent an important class of building blocks in the chemical industry. Currently, light aromatics are obtained exclusively from fossil feedstock, whose utilization is associated with serious environmental concerns. Developing new routes for a more sustainable BTX production is, therefore, of high importance. In this work, aromatization of ethylene over well-defined metal-modified HZSM-5 zeolite catalysts is examined. The results show that modification of zeolite with gallium, zinc and silver leads to a significant increase in aromatics production. Metal species are responsible for catalysing dehydrogenation pathways with Ga being the most efficient for BTX production. Increasing temperature and ethylene partial pressure facilitate ethylene aromatization. Employing a combination of isotope labelling with a thorough characterization of zeolite-entrapped species by means of IR and MAS NMR spectroscopy provides evidence for the involvement of intra-zeolite aromatic hydrocarbon species in the catalytic cycle.

Graphical abstract: Aromatization of ethylene over zeolite-based catalysts

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Article information


Submitted
19 Oct 2019
Accepted
04 Jan 2020
First published
06 Jan 2020

This article is Open Access

Catal. Sci. Technol., 2020, Advance Article
Article type
Paper

Aromatization of ethylene over zeolite-based catalysts

E. A. Uslamin, H. Saito, N. Kosinov, E. Pidko, Y. Sekine and E. J. M. Hensen, Catal. Sci. Technol., 2020, Advance Article , DOI: 10.1039/C9CY02108F

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