热解气氛对三种煤半焦催化、气化与吸附特性的影响
收稿日期: 2017-01-05
修回日期: 2017-05-04
网络出版日期: 2017-06-30
基金资助
国家自然科学基金项目（51576100，51506091）；
中央高校基本科研业务费专项资金资助（30915011325）
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
煤半焦可作为催化剂、锅炉或气化炉燃料、吸附剂等。在煤炭分级转化利用技术中，原煤在热解气气氛下进行热解，相较惰性气氛，热解气气氛会对热解半焦的催化、气化和吸附特性产生影响。本文选取河南烟煤、山西无烟煤和内蒙古褐煤，研究以Ar、H2、CO、CO2和CH4作为热解气氛对热解半焦催化、气化和吸附特性的影响。结果表明，在CH4-CO2重整反应中，CO2热解气氛下制得半焦的催化活性最好。在半焦-CO2和半焦-H2O气化反应中，烟煤在Ar、H2、CO、CO2气氛下制取的半焦的气化活性要优于在CH4气氛下制取的半焦；而无烟煤与褐煤在Ar、CO、CO2、CH4气氛下制取的半焦的气化活性要优于在H2气氛下制取的半焦。在SO2吸附实验中，Ar、H2、CO、CO2气氛下制取的半焦的吸附能力要强于CH4热解气氛下制得的半焦。
雷 凯 , 宋增华 , 徐 昊 , 董一江 , 陈一樊 , 张 睿 , 刘 冬 . 热解气氛对三种煤半焦催化、气化与吸附特性的影响[J]. 新能源进展, 2017 , 5(3) : 231 -237 . DOI: 10.3969/j.issn.2095-560X.2017.03.011
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
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