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Effect of Pyrolysis Atmosphere on Catalysis, Gasification and Adsorption Characteristics of Coal Chars from Three Different Coal Ranks
Received date: 2017-01-05
Revised date: 2017-05-04
Online published: 2017-06-30
Coal chars can be used as catalyst, fuel of boiler and gasifiers, and adsorbents. In the coal staged conversion utilization polygeneration system, the raw coal is pyrolyzed in the atmosphere of pyrolysis gas. Compared with the inert gas atmosphere, the pyrolysis gas atmosphere will certainly influence the catalytic, gasification and adsorption characteristics of coal chars. In this paper, the Henan bituminous coal, Shanxi anthracite and Inner Mongolia lignite were selected to study the catalysis, gasification and adsorption characteristics of coal chars, and the coal chars were pyrolyzed in Ar, H2, CO, CO2 and CH4, respectively. The results indicate that coal chars prepared in CO2 atmosphere have the best catalytic reactivity in CH4-CO2 reforming reaction. In the gasification reaction of char-CO2 and char-H2O, the bituminous coal chars pyrolyzed in Ar, H2, CO or CO2 atmospheres have higher gasification reactivity than those pyrolyzed in CH4 atmosphere, while Shanxi anthracite and Inner Mongolia lignite chars pyrolyzed in Ar, CO, CO2 or CH4 atmospheres have better gasification reactivity than those pyrolyzed in H2 atmosphere. The chars prepared in Ar, H2, CO or CO2 atmosphere have stronger adsorption capacity for SO2 than the chars prepared in CH4 atmosphere.
Key words： coal chars; pyrolysis atmosphere; catalysis; gasification; adsorption
LEI Kai , SONG Zeng-hua , XU Hao , DONG Yi-jiang , CHEN Yi-fan , ZHANG Rui , LIU Dong . Effect of Pyrolysis Atmosphere on Catalysis, Gasification and Adsorption Characteristics of Coal Chars from Three Different Coal Ranks[J]. Advances in New and Renewable Energy, 2017 , 5(3) : 231 -237 . DOI: 10.3969/j.issn.2095-560X.2017.03.011
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