Catalytic hot gas cleaning of gasification gas

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

Research output: Contribution to journalArticleScientificpeer-review

119 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

Fingerprint

Tars
Tar
Gasification
Ammonia
Cleaning
Gases
Catalysts
Calcium Carbonate
Nickel
Limestone
Fluidized beds
Dust
Catalyst activity
Carbon
Iron
Decomposition
Temperature
Costs

Keywords

  • gasification

Cite this

Simell, Pekka ; Kurkela, Esa ; Ståhlberg, Pekka ; Hepola, Jouko. / Catalytic hot gas cleaning of gasification gas. In: Catalysis Today. 1996 ; Vol. 27, No. 1-2. pp. 55-62.
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Catalytic hot gas cleaning of gasification gas. / Simell, Pekka (Corresponding Author); Kurkela, Esa; Ståhlberg, Pekka; Hepola, Jouko.

In: Catalysis Today, Vol. 27, No. 1-2, 1996, p. 55-62.

Research output: Contribution to journalArticleScientificpeer-review

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AU - Simell, Pekka

AU - Kurkela, Esa

AU - Ståhlberg, Pekka

AU - Hepola, Jouko

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Y1 - 1996

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AB - 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.

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