A Modified Gibbs Free Energy Minimisation Model for Fluid Bed Coal Gasification
A modified approach to equilibrium modelling of coal gasification is presented, based on global thermodynamic analysis of both homogeneous and heterogeneous reactions occurring during a gasification process conducted in a circulating fluid bed reactor. The model is based on large-scale experiments (...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Polish Academy of Sciences Committee of Chemical and Process Engineering
2015-03-01
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| Series: | Chemical and Process Engineering |
| Subjects: | |
| Online Access: | http://www.degruyter.com/view/j/cpe.2015.36.issue-1/cpe-2015-0006/cpe-2015-0006.xml?format=INT |
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| Summary: | A modified approach to equilibrium modelling of coal gasification is presented, based on global thermodynamic analysis of both homogeneous and heterogeneous reactions occurring during a gasification process conducted in a circulating fluid bed reactor. The model is based on large-scale experiments (ca. 200 kg/h) with air used as a gasification agent and introduces empirical modifications governing the quasi-equilibrium state of two reactions: water-gas shift and Boudouard reaction. The model predicts the formation of the eight key gaseous species: CO, CO2, H2O, H2, H2S, N2, COS and CH4, volatile hydrocarbons represented by propane and benzene, tar represented by naphthalene, and char containing the five elements C, H, O, N, S and inorganic matter. |
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| ISSN: | 2300-1925 |