Stability, deactivation and regeneration study of a newly developed HZSM-5 and Ni-doped HZSM-5 zeolite catalysts for ethanol-to-hydrocarbon conversion

Ifeanyi Michael Smarte Anekwe, Maggie Chetty, Lindiwe Khotseng, Sammy Lewis Kiambi, Lakesh Maharaj, Bilainu Oboirien, Yusuf Makarfi Isa

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

This work investigates the stability and regeneration of HZSM-5 and Ni/HZSM-5 catalysts in the ethanol-to-hydrocarbon conversion. The catalysts were characterised using different techniques and evaluated at 623 K and 7 h−1 for 96 h TOS with two regeneration cycles. HZSM-5 showed high stability with 100% ethanol conversion, while Ni/HZSM-5 catalysts maintained 100% stability for 48 h before dropping. Regenerated catalysts were comparable to the originals in terms of product distribution, stability, and performance. HZSM-5 preferred BTX, while Ni-doped catalysts favoured C5-C8, C9-C12, and C12+ synthesis. The regeneration process restored catalytic activity, especially for the Ni-doped catalysts, extending their life and reducing replacement costs.

Original languageEnglish
Article number106802
JournalCatalysis Communications
Volume186
DOIs
Publication statusPublished - Jan 2024

Keywords

  • Catalyst
  • Ethanol
  • Regeneration
  • Stability
  • ZSM-5

ASJC Scopus subject areas

  • Catalysis
  • General Chemistry
  • Process Chemistry and Technology

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