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Catalysts 2012, 2(2), 281-298; doi:10.3390/catal2020281
Article

Hot and Dry Cleaning of Biomass-Gasified Gas Using Activated Carbons with Simultaneous Removal of Tar, Particles, and Sulfur Compounds

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Received: 29 February 2012; in revised form: 11 April 2012 / Accepted: 18 April 2012 / Published: 8 May 2012
(This article belongs to the Special Issue Catalysts for Biomass Conversion)
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Abstract: This study proposes a gas-cleaning process for the simultaneous removal of sulfur compounds, tar, and particles from biomass-gasified gas using Fe-supported activated carbon and a water-gas shift reaction. On a laboratory scale, the simultaneous removal of H2S and COS was performed under a mixture of gases (H2/CO/CO2/CH4/C2H4/N2/H2S/COS/steam). The reactions such as COS + H2 → H2S + CO and COS + H2O → H2S + CO2 and the water-gas shift reaction were promoted on the Fe-supported activated carbon. The adsorption capacity with steam was higher than that without steam. On a bench scale, the removal of impurities from a gas derived from biomass gasification was investigated using two activated filters packed with Fe-supported activated carbon. H2S and COS, three- and four-ring polycyclic aromatic hydrocarbons (PAHs), and particles were removed and a water-gas shift reaction was promoted through the first filter at 320–350 °C. The concentrations of H2S and COS decreased to less than 0.1 ppmv. Particles and the one- and two-ring PAHs, except for benzene, were then removed through the second filter at 60–170 °C. The concentration of tar and particles decreased from 2428 to 102 mg Nm−3 and from 2244 to 181 mg Nm−3, respectively.
Keywords: biomass; gasification; tar; particles; H2S; COS; activated carbons biomass; gasification; tar; particles; H2S; COS; activated carbons
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Hanaoka, T.; Matsunaga, K.; Miyazawa, T.; Hirata, S.; Sakanishi, K. Hot and Dry Cleaning of Biomass-Gasified Gas Using Activated Carbons with Simultaneous Removal of Tar, Particles, and Sulfur Compounds. Catalysts 2012, 2, 281-298.

AMA Style

Hanaoka T, Matsunaga K, Miyazawa T, Hirata S, Sakanishi K. Hot and Dry Cleaning of Biomass-Gasified Gas Using Activated Carbons with Simultaneous Removal of Tar, Particles, and Sulfur Compounds. Catalysts. 2012; 2(2):281-298.

Chicago/Turabian Style

Hanaoka, Toshiaki; Matsunaga, Kotetsu; Miyazawa, Tomohisa; Hirata, Satoshi; Sakanishi, Kinya. 2012. "Hot and Dry Cleaning of Biomass-Gasified Gas Using Activated Carbons with Simultaneous Removal of Tar, Particles, and Sulfur Compounds." Catalysts 2, no. 2: 281-298.


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