Are hierarchical zeolites good catalysts for Methane Dehydroaromatization? A critical analysis

Kun Liu, Mustafa Çağlayan, Alla Dikhtiarenko, Xin Zhang, Orxan Sayidov, Edy Abou-Hamad, Jorge Gascon*, Abhishek Dutta Chowdhury

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

The socioeconomic dependence on natural gas must be reduced to comply with the stricter carbon emissions requirements. However, avoiding natural gas from the future energy mix is easier said than done. To bridge this gap, lignocellulosic biomass-derived biomethane (aka. “renewable natural gas”) represents an elegant solution to this contemporary problem. Owing to the increased industrial interest in hierarchically structured zeolites for biomethane valorization, through this work, we explore the technical feasibility and challenges associated with methane dehydroaromatization over Mo-loaded on both microporous and hierarchical zeolite ZSM-5. Hierarchical zeolites were prepared using inexpensive and environmentally benign glucose as a secondary organic structure directing agent, leading to two shapes (coffins and hexagonal bars) with comparable physicochemical properties. Although a similar catalytic performance was obtained over (nano-sized) microporous and hexagonal bar-derived zeolites, coffin-shaped zeolite catalysts led to lower activity and slower deactivation. Herein, catalyst deactivation was governed by inter- and intra-particle diffusional properties.

Original languageEnglish (US)
Pages (from-to)22-35
Number of pages14
JournalCatalysis Today
Volume408
DOIs
StatePublished - Jan 15 2023

Bibliographical note

Publisher Copyright:
© 2022 Elsevier B.V.

Keywords

  • Bifunctional catalysis
  • Biomethane
  • Catalyst deactivation
  • Dehydroaromatization
  • Zeolite

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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