Catalytic purification of tarry fuel gas

Pekka Simell, Johan Bredenberg (Corresponding Author)

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

This study compared the abilities of various materials to catalyse the decomposition of tar constituents in fuel gas. The materials were tested on a sample gas flow from an industrial-scale peat-fired updraft gasification process. The tar content of the gas was about 100 g m−3. When the treatment temperature was 900 °C, and the gas residence time in the catalyst bed was 0.3 s, the ability of the tested materials to decompose tar decreased in the order: commercial nickel catalyst (Ni on Al2O3) >dolomite >activatedaluminacatalyst >silica-aluminacatalyst >siliconcarbide (inert). With the nickel catalyst the tar and light hydrocarbons contained in the gas were almost completely decomposed into gases (CO, H2). An increase in the water content of the gasifier fuel resulted in a reduction in the tar content and an increase in the ratio of the treated gas. The most important effect of the catalyst appeared to be the catalysis of the reactions between the intermediate thermal degradation products, such as light hydrocarbons and deposited carbon, and water vapour.
Original languageEnglish
Pages (from-to)1219-1225
JournalFuel
Volume69
Issue number10
DOIs
Publication statusPublished - 1990
MoE publication typeA1 Journal article-refereed

Fingerprint

Tars
Gas fuels
Tar
Purification
Gases
Catalysts
Hydrocarbons
Nickel
Peat
Steam
Carbon Monoxide
Gasification
Silicon Dioxide
Water vapor
Water content
Catalysis
Flow of gases
Pyrolysis
Carbon
Silica

Keywords

  • gasification

Cite this

Simell, Pekka ; Bredenberg, Johan. / Catalytic purification of tarry fuel gas. In: Fuel. 1990 ; Vol. 69, No. 10. pp. 1219-1225.
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abstract = "This study compared the abilities of various materials to catalyse the decomposition of tar constituents in fuel gas. The materials were tested on a sample gas flow from an industrial-scale peat-fired updraft gasification process. The tar content of the gas was about 100 g m−3. When the treatment temperature was 900 °C, and the gas residence time in the catalyst bed was 0.3 s, the ability of the tested materials to decompose tar decreased in the order: commercial nickel catalyst (Ni on Al2O3) >dolomite >activatedaluminacatalyst >silica-aluminacatalyst >siliconcarbide (inert). With the nickel catalyst the tar and light hydrocarbons contained in the gas were almost completely decomposed into gases (CO, H2). An increase in the water content of the gasifier fuel resulted in a reduction in the tar content and an increase in the ratio of the treated gas. The most important effect of the catalyst appeared to be the catalysis of the reactions between the intermediate thermal degradation products, such as light hydrocarbons and deposited carbon, and water vapour.",
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Catalytic purification of tarry fuel gas. / Simell, Pekka; Bredenberg, Johan (Corresponding Author).

In: Fuel, Vol. 69, No. 10, 1990, p. 1219-1225.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Catalytic purification of tarry fuel gas

AU - Simell, Pekka

AU - Bredenberg, Johan

PY - 1990

Y1 - 1990

N2 - This study compared the abilities of various materials to catalyse the decomposition of tar constituents in fuel gas. The materials were tested on a sample gas flow from an industrial-scale peat-fired updraft gasification process. The tar content of the gas was about 100 g m−3. When the treatment temperature was 900 °C, and the gas residence time in the catalyst bed was 0.3 s, the ability of the tested materials to decompose tar decreased in the order: commercial nickel catalyst (Ni on Al2O3) >dolomite >activatedaluminacatalyst >silica-aluminacatalyst >siliconcarbide (inert). With the nickel catalyst the tar and light hydrocarbons contained in the gas were almost completely decomposed into gases (CO, H2). An increase in the water content of the gasifier fuel resulted in a reduction in the tar content and an increase in the ratio of the treated gas. The most important effect of the catalyst appeared to be the catalysis of the reactions between the intermediate thermal degradation products, such as light hydrocarbons and deposited carbon, and water vapour.

AB - This study compared the abilities of various materials to catalyse the decomposition of tar constituents in fuel gas. The materials were tested on a sample gas flow from an industrial-scale peat-fired updraft gasification process. The tar content of the gas was about 100 g m−3. When the treatment temperature was 900 °C, and the gas residence time in the catalyst bed was 0.3 s, the ability of the tested materials to decompose tar decreased in the order: commercial nickel catalyst (Ni on Al2O3) >dolomite >activatedaluminacatalyst >silica-aluminacatalyst >siliconcarbide (inert). With the nickel catalyst the tar and light hydrocarbons contained in the gas were almost completely decomposed into gases (CO, H2). An increase in the water content of the gasifier fuel resulted in a reduction in the tar content and an increase in the ratio of the treated gas. The most important effect of the catalyst appeared to be the catalysis of the reactions between the intermediate thermal degradation products, such as light hydrocarbons and deposited carbon, and water vapour.

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