Bed material as a catalyst for char gasification: The case of ash-coated olivine activated by K and S addition

Berdugo Vilches, Teresa, 1985 (author): Chalmers tekniska högskola,Chalmers University of Technology

Maric, Jelena, 1983 (author): Chalmers tekniska högskola,Chalmers University of Technology

Knutsson, Pavleta, 1980 (author): Chalmers tekniska högskola,Chalmers University of Technology

Rosenfeld, Daniel C. (author): Chalmers tekniska högskola,Chalmers University of Technology

Thunman, Henrik, 1970 (author): Chalmers tekniska högskola,Chalmers University of Technology

Seemann, Martin, 1975 (author): Chalmers tekniska högskola,Chalmers University of Technology

(creator_code:org_t)

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Abstract Subject headings

In this paper, the ability of an ash-coated olivine to catalyze the steam gasification of biomass-derived char is investigated in a laboratory reactor. The olivine investigated is a sample from the Chalmers dual fluidized bed gasifier and it has been activated by the in-bed addition of S and K 2 CO 3 . The char and bed material samples were analyzed by Scanning Electron Microscopy coupled with Energy Dispersive X-ray Spectroscopy (SEM-EDS). It is shown that the ash layer coating of the olivine can catalyze the steam gasification of char by transferring catalytic potassium (K) to the char particles. The mobilities of the catalytic species from the olivine ash-layer are discussed. This work furthers the current understanding of the catalytic activities of ash-coated bed material particles during the thermochemical conversion of carbonaceous feedstocks in fluidized beds. In addition, it complements the existing literature on catalytic bed materials, which to date have focused on tar removal and improving gas quality.

TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Bearbetnings-, yt- och fogningsteknik (hsv//swe)
ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Manufacturing, Surface and Joining Technology (hsv//eng)
TEKNIK OCH TEKNOLOGIER -- Kemiteknik -- Kemiska processer (hsv//swe)
ENGINEERING AND TECHNOLOGY -- Chemical Engineering -- Chemical Process Engineering (hsv//eng)
TEKNIK OCH TEKNOLOGIER -- Industriell bioteknik -- Bioenergi (hsv//swe)
ENGINEERING AND TECHNOLOGY -- Industrial Biotechnology -- Bioenergy (hsv//eng)

By the author/editor: Berdugo Vilches, ...; Maric, Jelena, 1 ...; Knutsson, Pavlet ...; Rosenfeld, Danie ...; Thunman, Henrik, ...; Seemann, Martin, ...

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Materials Engine ...; and Manufacturing Su ...

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Chemical Enginee ...; and Chemical Process ...

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Industrial Biote ...; and Bioenergy

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