Manganese oxide as catalyst for tar cleaning of biomass-derived gas
Artikel i vetenskaplig tidskrift, 2012

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.

Gas cleaning



Dual fluidized bed




Fredrik Lind

Chalmers, Energi och miljö, Energiteknik

Mikael Israelsson

Chalmers, Energi och miljö, Energiteknik

Martin Seemann

Chalmers, Energi och miljö, Energiteknik

Henrik Thunman

Chalmers, Energi och miljö, Energiteknik

Biomass Conversion and Biorefinery

2190-6815 (ISSN) 2190-6823 (eISSN)

Vol. 2 2 133 - 140


Hållbar utveckling


Övrig annan teknik

Kemiska processer

Annan kemi





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