Characteristics of oxygen chemisorption on porous coal char |
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| Authors: | Kwang Sup Song Sang Done Kim |
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| Affiliation: | (1) Energy Efficiency Research Department, Korea Institute of Energy Research, 305-343 Taejon, Korea;(2) Department of Chemical Engineering and Energy & Environment Research Center, Korea Advanced Institute of Science and Technology, 305-701 Taejon, Korea |
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| Abstract: | Oxygen chemisorption on a porous coal char was investigated by a typical consecutive pyrolysis and chemisorption experiments
in a thermogravimetic analyzer. Small amounts of carbon-oxygen surface complexes are gasified to CO and CO2 during the oxygen chemisorption at 423 K. The kinetic equation of oxygen chemisorption on porous char including gasification
of surface oxides well represents the chemisorption/gasification behavior of oxygen on the coal char. The activation energy
and the frequency factor for oxygen chemisorption on coal-char are found to be 57 kJ/mol and 9.16×106/hr, respectively. |
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| Keywords: | Coal-Char Chemisorption Gasification Kinetic Equation |
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