Manganese oxide as catalyst for tar cleaning of biomass-derived gas

Lind, Fredrik,1978Chalmers tekniska högskola,Chalmers University of Technology (författare)

The possibilities to upgrade raw gas with the use of a manganese oxide have been investigated in an application for secondary tar cleaning of biomass derived gas. Experiments were conducted in a reactor system where a novel technique that combines tar cleaning with catalyst regeneration is applied. Raw gas from the Chalmers non-catalytic steam biomass gasifier - containing roughly 32 gtar/Nm3gas - was fed to the tar cleaning reactor. The tar reforming qualities of the manganese oxide were evaluated in the reactor system using a mixture of 23 wt% catalysts in silica sand at the temperatures 700 and 800°C. Experiments showed that the catalyst was continuously regenerated from carbon deposits and that the total amount of tars was decreased by as much as 44,5% at a gas residence time of 0.4 s in the bed. The catalyst showed activity in water-gas shift reaction and the H2/CO-ratio increased from 0.6 in the raw gas to a peak value of 1 in the reformed gas at 800°C. Only a slight decrease in methane and acetylene content was observed for both operating temperatures.

Israelsson, Mikael,1985Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)israelsm (författare)
Seemann, Martin,1975Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)seemann (författare)
Thunman, Henrik,1970Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)heth (författare)
Chalmers tekniska högskola (creator_code:org_t)

Ingår i:Biomass Conversion and Biorefinery: Springer Science and Business Media LLC2:2, s. 133 - 1402190-68152190-6823

Av författaren/redakt...: Lind, Fredrik, 1 ...; Israelsson, Mika ...; Seemann, Martin, ...; Thunman, Henrik, ...

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