Kinetics of steam and CO2 gasification with high ash fusion temperature coal char under elevated pressure

A high ash fusion temperature (AFT) coal char was gasified with steam and CO 2 under elevated pressure in a modified pressurized thermogravimetric analyzer. The ambient pressure varied from 0.5 MPa to 3 MPa. It was found that activation energy E a (char-CO 2 reaction) was from 214.19 kJ/mol to 240.3...

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Published inEnergy sources. Part A, Recovery, utilization, and environmental effects Vol. 39; no. 24; pp. 2188 - 2194
Main Authors An, Haiquan, Yu, Juan, Jiang, Yanchi, Fan, Junjie, Zhang, Zhongxiao
Format Journal Article
LanguageEnglish
Published Taylor & Francis 17.12.2017
Subjects
Gasification
high AFT coal
kinetic
pressure
shrinking core model
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Summary:A high ash fusion temperature (AFT) coal char was gasified with steam and CO 2 under elevated pressure in a modified pressurized thermogravimetric analyzer. The ambient pressure varied from 0.5 MPa to 3 MPa. It was found that activation energy E a (char-CO 2 reaction) was from 214.19 kJ/mol to 240.35 kJ/mol, and activation energy E a (char-steam reaction) was from 170.02 kJ/mol to 174.02 kJ/mol by using shrinking core model. The factor of partial pressure influence (n) was 0.44 and 0.54 for CO 2 and steam gasification, respectively. The results proved that the high AFT coal (LJ coal) has poor gasification reactivity by comparing with other research and provided complete kinetic data for developing the entrained flow gasification technology using high AFT coal.
ISSN:1556-7036
1556-7230
DOI:10.1080/15567036.2016.1261207