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OALib Journal期刊
ISSN: 2333-9721
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基于流化床热解的中药渣两段气化基础研究
, PP. 294-301
Keywords: 两段气化,中药渣,焦油裂解/重整,半焦催化
Abstract:
？以中药渣为原料,研究了流化床热解和固定床半焦催化/重整焦油及半焦气化的特性,特别是对固定床重整前后焦油中组分的变化进行了分析。结果表明,随着热解气体在固定床半焦中停留时间从0s延长到0.95s,焦油中-oh、c-h、c-o、c=o和c=c官能团的含量显著减少,芳香类物质含量明显增加;向固定床中加入水蒸气后,焦油中芳香类、c-o和羟基-oh官能团的含量增加;而加入氧气后,焦油中羟基-oh、c-h、羰基c=o、c=c和c-o官能团物质含量变化不大,但芳烃类物质明显增多。虽然向固定床中加入水蒸气或氧气均能降低焦油含量,但水蒸气的作用稍弱,两者联合对焦油脱除和半焦气化效果更好,生成的燃气中基本不含焦油。
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