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OALib Journal期刊
ISSN: 2333-9721
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h2气氛下褐煤快速热解过程中ch4逸出规律的分析
, PP. 537-545
Keywords: h2气氛,加压快速热解,ch4逸出规律,化学键断裂
Abstract:
？在带有输送煤样的管式反应器上进行了霍林河褐煤加压快速氢解实验,分析了h2对煤/半焦的化学键断裂和对ch4生成规律的影响。在加压快速氢解条件下,ch4产率随着热解温度升高、压力的增大而增大;在50%h2气氛下,操作压力为1.0mpa、温度为900℃时,ch4产率为8.08%,达到最大,较n2气氛下的提高了72.5%。h2或h·自由基诱发了芳环的开裂、侧链、脂肪链和醚键的断裂,促进了煤热解。ch4产率的增加主要是由于外部供h的结果;热解温度低于700℃时,h2对煤结构中活性基团的作用促进了煤热解,导致了ch4产率的增加;而热解温度高于700℃后,煤/半焦加氢气化促进了ch4产率的增加。
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