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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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镍基焦油裂解催化剂再生特性及粉尘作用机理研究
, PP. 945-951
Keywords: 粉尘,焦油裂解,镍基催化剂,再生,积炭
Abstract:
？在常压固定床反应器中，考察1.0%nio/0.1%mgo-al2o3催化剂的稳定性和原位再生性能，并在进料中引入粉尘以模拟真实的煤与生物质热解气化的含尘环境。结果表明，随着反应温度的升高，催化剂的活性提高，寿命缩短。该催化剂在循环再生实验中表现出良好的耐久性，再生温度为800℃时水热失活现象显著，优选的再生温度为600~700℃，再生时间20min。随着再生剂中水蒸气比例的增加，催化剂的比表面积和孔结构逐渐发生变化。epma和xrd表征结果表明，引入粉尘后并未改变催化剂的组成，引入mgo后会形成（mg0.4al0.6）al1.8o4晶相。sio2具有促进积炭产生的作用，mgo则对积炭的产生具有一定的阻滞作用。适当降低空速可减弱sio2等惰性粉尘对催化剂活性的负面作用。
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