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Bifunctional Catalyst for Direct Synthesis of Aromatics from Syngas Developed by the Wuhan University

2020-01-14 17:49:00
中國煉油與石油化工 2020年1期

Recently the R&D team of the Energy and Mechanical College of Wuhan University has developed a novel bifunctional catalyst for direct manufacture of aromatics via catalytic conversion of syngas. The said R&D team has designed and synthesized a hollow HZSM-5 zeolite which is coupled with the Fe3O4/MnO2catalyst capable of producing olefin-rich products, resulting in a novel bifunctional catalyst. This bifunctional catalyst when operating under commercial reaction conditions can achieve a CO conversion of more than 90% and an aromatics selectivity of 57%, while the catalytic stability can be maintained within 180 hours.This catalyst through the spatial limitations of core-shell structure of Fe3O4/MnO2and electronic modification of Mn co-catalyst can apparently promote the conversion of syngas into olefin intermediates, which can be further converted into the target aromatic products under the action of acidic sites of hollow HZSM-5 zeolite. The formation of cavity structure in hollow HZSM-5 zeolite and the shortened channel length have enhanced the diffusion of reactant molecules and product molecules, which are conducive to the formation of aromatics and can inhibit the accumulation of carbon deposits in the channels of zeolite to obviously improve the stability of the said catalyst.

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