Catalytic purification of tarry fuel gas with carbonate rocks and ferrous materials

Pekka Simell, Jukka Leppälahti, Johan Bredenberg

Research output: Contribution to journalArticleScientificpeer-review

132 Citations (Scopus)

Abstract

This study compared the capability of various low-cost materials to catalyse the decomposition of tarry constituents in fuel gas. Carbonate rocks (dolomite, limestone) and ferrous materials (iron sinter, pellet) were tested in a tube reactor. Sample gas flow from a peat-fired gasifier was used as feed. An increase in the treatment temperature and extension of the residence time decreased the tar content. With carbonate rocks almost complete tar decomposition was accomplished at 900 °C. The ferrous materials were not as effective, but the content of the most problematic tar fraction decreased significantly. The thermal value of dry gas increased, due to the increase of H2 and CO contents by catalytic water-gas and water-gas shift reactions. The activity of the carbonate rocks increased with a greater CaMg ratio and smaller grain size of the original rock. Activity was also increased by the presence of iron in the carbonate rocks and by the mineral matter in the ferrous materials.
Original languageEnglish
Pages (from-to)211-217
Number of pages7
JournalFuel
Volume71
Issue number2
DOIs
Publication statusPublished - 1992
MoE publication typeA1 Journal article-refereed

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Gas fuels
Carbonates
Purification
Tars
Rocks
Tar
Iron
Gases
Decomposition
Water gas shift
Peat
Calcium Carbonate
Carbon Monoxide
Limestone
Minerals
Flow of gases
Thermodynamic properties
Water
Costs
Temperature

Cite this

Simell, Pekka ; Leppälahti, Jukka ; Bredenberg, Johan. / Catalytic purification of tarry fuel gas with carbonate rocks and ferrous materials. In: Fuel. 1992 ; Vol. 71, No. 2. pp. 211-217.
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abstract = "This study compared the capability of various low-cost materials to catalyse the decomposition of tarry constituents in fuel gas. Carbonate rocks (dolomite, limestone) and ferrous materials (iron sinter, pellet) were tested in a tube reactor. Sample gas flow from a peat-fired gasifier was used as feed. An increase in the treatment temperature and extension of the residence time decreased the tar content. With carbonate rocks almost complete tar decomposition was accomplished at 900 °C. The ferrous materials were not as effective, but the content of the most problematic tar fraction decreased significantly. The thermal value of dry gas increased, due to the increase of H2 and CO contents by catalytic water-gas and water-gas shift reactions. The activity of the carbonate rocks increased with a greater CaMg ratio and smaller grain size of the original rock. Activity was also increased by the presence of iron in the carbonate rocks and by the mineral matter in the ferrous materials.",
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Catalytic purification of tarry fuel gas with carbonate rocks and ferrous materials. / Simell, Pekka; Leppälahti, Jukka; Bredenberg, Johan.

In: Fuel, Vol. 71, No. 2, 1992, p. 211-217.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Catalytic purification of tarry fuel gas with carbonate rocks and ferrous materials

AU - Simell, Pekka

AU - Leppälahti, Jukka

AU - Bredenberg, Johan

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PY - 1992

Y1 - 1992

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AB - This study compared the capability of various low-cost materials to catalyse the decomposition of tarry constituents in fuel gas. Carbonate rocks (dolomite, limestone) and ferrous materials (iron sinter, pellet) were tested in a tube reactor. Sample gas flow from a peat-fired gasifier was used as feed. An increase in the treatment temperature and extension of the residence time decreased the tar content. With carbonate rocks almost complete tar decomposition was accomplished at 900 °C. The ferrous materials were not as effective, but the content of the most problematic tar fraction decreased significantly. The thermal value of dry gas increased, due to the increase of H2 and CO contents by catalytic water-gas and water-gas shift reactions. The activity of the carbonate rocks increased with a greater CaMg ratio and smaller grain size of the original rock. Activity was also increased by the presence of iron in the carbonate rocks and by the mineral matter in the ferrous materials.

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