Investigation of H{sub 2}O and CO{sub 2} reforming and partial oxidation of methane: catalytic effects of coal char and coal ash
- Western Kentucky University, Bowling Green, KY (United States). Institute for Combustion Science and Environmental Technology
Methane reforming and partial oxidation was studied to evaluate the catalytic effects of coal chars and coal ashes on methane (CH{sub 4}) conversion, sum selectivity (the sum of H{sub 2} and CO), and ratio selectivity (the ratio of H{sub 2}/CO) in an atmospheric fluidized bed. The kinetics study presented the possibility of CH{sub 4} reforming and partial oxidation with a favorable H{sub 2}/CO ratio, greater than 5. The higher H{sub 2}/CO ratio in CH{sub 4} reforming and the partial-oxidation process can reduce the consumption of CH{sub 4} needed to adjust the H{sub 2}/CO ratio during combined coal gasification and methane reforming. Coal ashes failed to be good candidates of catalysts on CH{sub 4} reforming and partial oxidation because of their very low specific surface area available for catalytic reactions. However, coal chars presented very promising catalytic performance on CH{sub 4} reforming and partial oxidation because of their larger specific surface area. In this study, no other constituents in coal fly ash or special surface properties of coal chars were correlated with the enhanced methane-conversion efficiency. It seems that the specific surface area is only variable in controlling methane-conversion efficiency. 16 refs., 9 figs.
- OSTI ID:
- 21084944
- Journal Information:
- Energy and Fuels, Journal Name: Energy and Fuels Journal Issue: 4 Vol. 22; ISSN ENFUEM; ISSN 0887-0624
- Country of Publication:
- United States
- Language:
- English
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