Catalytic hot gas cleaning of gasification gas

Pekka Simell (Corresponding Author), Esa Kurkela, Pekka Ståhlberg, Jouko Hepola

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124 Citations (Scopus)

Abstract

Gasification gas containing dust can be efficiently purified from tars and ammonia with nickel monolith catalyst. Temperatures over 900°C and residence times of about 1 s (SV 2500 1/h) were needed at 5 bar pressure to obtain complete tar decomposition and 80% ammonia conversion with a feed gas from a pilot scale fluidized bed gasifier. At these conditions deactivation caused by carbon deposition or by H2S can be avoided. Decline of catalyst activity was not observed during 100 h long test runs. Dolomites and limestones can be used as effective tar decomposing catalysts at lower pressures and around 900°C temperatures, where they stay in calcined form. Low-cost iron containing materials can in turn be applied for catalytic ammonia removal.
Original languageEnglish
Pages (from-to)55-62
Number of pages8
JournalCatalysis Today
Volume27
Issue number1-2
DOIs
Publication statusPublished - 1996
MoE publication typeA1 Journal article-refereed
Event1st World Conference Environmental Catalysis For a Better World and Life - Pisa, Italy
Duration: 1 May 19955 May 1995

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Keywords

  • gasification

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