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Kinetic studies of a lignite char pressurized gasification with CO2, H2 and steam

✍ Scribed by Li Shufen; Sun Ruizheng

Publisher: Elsevier Science
Year: 1994
Tongue: English
Weight: 333 KB
Volume: 73
Category: Article
ISSN: 0016-2361
DOI: 10.1016/0016-2361(94)90095-7

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✦ Synopsis

This work reports a kinetic study of the pressurized gasification of a lignite char with CO,, H, and steam using a packed bed balance reactor (PBBR) system. The kinetics were studied under selected conditions in which the external and internal diffusion effects were negligible and chemical reaction was the rate controlling step. The experimental results are well described by the unreacted core shrinking model for this lignite char with CO, and steam, and by the volume model for the char with hydrogen. Rate constants for a kinetic equation, and activation energies, have been determined by the application of the model. Comparison of the results for the three gasification agents show that their reactivities varied, in the order,

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