Atomic layer deposition coated filters in catalytic filtration of gasification gas

Tyko Viertiö (Corresponding Author), Viivi Kivelä, Matti Putkonen, Johanna Kihlman, Pekka Simell

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Steel filter discs were catalytically activated by ALD, using a coating of supporting Al2 O3 layer and an active NiO layer for gas cleaning. Prepared discs were tested for model biomass gasification and gas catalytic filtration to reduce or eliminate the need for a separate reforming unit for gasification gas tars and lighter hydrocarbons. Two different coating methods were tested. The method utilizing the stop-flow setting was shown to be the most suitable for the preparation of active and durable catalytic filters, which significantly decreases the amount of tar compounds in gasification gas. A pressure of 5 bar and temperatures of over 850 C are required for efficient tar reforming. In optimal conditions, applying catalytic coating to the filter resulted in a seven-fold naphthalene conversion increase from 7% to 49%.

Original languageEnglish
Article number688
JournalCatalysts
Volume11
Issue number6
DOIs
Publication statusPublished - Jun 2021
MoE publication typeA1 Journal article-refereed

Keywords

  • Atomic layer deposition (ALD)
  • Catalytic filtration
  • Gasification gas
  • Tar reforming

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