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The Effect of Sodium Catalyst Dispersion on the Carbon Dioxide Gasification Rate

Published online by Cambridge University Press:  28 February 2011

Jian Li ,
R. P. Adriaan  and
Van Heiningen
Jian Li
Affiliation:
Pulp and Paper Research Institute of Canada and McGill University, Department of Chemical Engineering, Montreal, Quebec, Canada, H3A 2A7
R. P. Adriaan
Affiliation:
Pulp and Paper Research Institute of Canada and McGill University, Department of Chemical Engineering, Montreal, Quebec, Canada, H3A 2A7
Van Heiningen
Affiliation:
Pulp and Paper Research Institute of Canada and McGill University, Department of Chemical Engineering, Montreal, Quebec, Canada, H3A 2A7
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Abstract

The CO2 gasification rate of black liquor char (b1c) is studied in a thermogravimetric analysis set-up at temperatures between 600 to 800° C. B1c is prepared via fast pyrolysis of the dry solids in spent liquor of the kraft wood pulping process. B1c gasification by CO2 is well described by Langmuir-Hinshelwood type kinetics. The gasification rate of blc is one order of magnitude larger than a high surface area activated carbon impregnated with 12% Na2CO3. Also, the gasification rate of b1c remains high at sodium-carbon ratios where the rate of Na2CO3 impregnated chars would be strongly reduced. With SEM-EDS mapping and line scans it is shown that the unique gasification properties of b1c are caused by a very fine distribution of sodium in the carbon structure.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 111: Symposium O – Microstructure and Properties of Catalysts , 1987 , 441
Copyright
Copyright © Materials Research Society 1988

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