为了克服生物质气化过程中的焦油产生问题,以泡沫镍（Ni Foam）为镍源和载体、ZSM-5分子筛为活性添加物质,采用浸渍法制得ZSM-5/Ni Foam催化剂并在两段式固定床反应系统进行生物质焦油催化裂解实验。结果表明：三维骨架结构的Ni Foam上负载具有酸性活性位点的ZSM-5,不仅可增加焦油与催化剂活性位点的接触面积,还可减缓催化过程中积碳的形成,从而获得更高的催化性能,800 ℃下焦油转化率达到90.2%,使得ZSM-5/Ni Foam具有良好的催化活性及循环稳定性。同时,也揭示出ZSM-5/Ni Foam的催化机制。
Abstract
To deal with the problem of tar production during biomass gasification, the ZSM-5/Ni Foam is used to explore its catalytic performance,which is prepared by impregnation method with Ni Foam as nickel source and carrier and ZSM-5 as active additive. The catalytic cracking of biomass tar is carried out in a segmented fixed-bed reaction system. The results show that when the acidic ZSM-5 is supported on the ideal three-dimensional framework structure of Ni Foam, the ZSM-5/Ni Foam not only increases the contact area between biomass tar and catalyst active sites,but also slows down the formation of carbon deposition during the catalytic process, thereby obtaining higher catalytic performance with the tar conversion rate reaching 90.2%. The ZSM-5/Ni Foam catalyst possesses good catalytic activity and cycle stability. At the same time,this paper also reveals the catalytic mechanism of ZSM-5/Ni Foam.
关键词
生物质 /
气化 /
焦油 /
复合催化剂 /
催化裂解
Key words
biomass /
gasification /
tar /
composite catalyst /
catalytic cracking
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基金
国家重点研发项目（2019YFD1100602）
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