Catalytic Upgrading of Coal Pyrolysis Gaseous Tar over Hierarchical Y-Type Zeolites Synthesized Using a Microwave Hydrothermal Method
Catalytic Upgrading of Coal Pyrolysis Gaseous Tar over Hierarchical Y-Type Zeolites Synthesized Using a Microwave Hydrothermal Method
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DOI：
10.1021/acs.iecr.9b03347
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发表时间：
2019-10
影响因子：
4.2
通讯作者：
Peng Lv;Lunjing Yan;Yan Liu;Meijun Wang;W. Bao;Fan Li
中科院分区：
文献类型：
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作者：
Peng Lv;Lunjing Yan;Yan Liu;Meijun Wang;W. Bao;Fan Li
本工作以有机硅烷为模板，通过微波水热法快速合成了一系列多级孔Y型沸石。研究了分级Y型沸石对煤热解气态焦油产物组成和轻芳烃收率的影响。结果表明，分级Y型沸石在气态焦油催化转化中表现出比传统微孔沸石更好的催化性能，可大幅提高热解产物中轻芳烃的收率。分级Y型沸石具有丰富的介孔，有助于大分子进入多孔通道和活性位点的接触。同时，介孔减小了反应产物的扩散长度，从而促进了气态焦油中重组分向轻质芳烃的转化。
In this work, a series of hierarchical Y-type zeolites were rapidly synthesized using organosilane as templates through a microwave hydrothermal method. The effects of hierarchical Y-type zeolites on the product composition and the yield of light aromatics in gaseous tar from coal pyrolysis were studied. The results showed that the hierarchical Y-type zeolites showed better catalytic properties than the traditional microporous zeolite in the catalytic conversion of gaseous tar and can greatly increase the yield of light aromatics in the pyrolysis products. The hierarchical Y-type zeolite has abundant mesopores, which contribute to the access of bulky molecules into the porous channel and the contact of active sites. Meanwhile, the mesopores reduce the diffusion length of the reaction products, thus promoting the conversion of heavy components in gaseous tar to light aromatics.