Control of zeolite microenvironment for propene synthesis from methanol.
Control of zeolite microenvironment for propene synthesis from methanol.
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甲醇合成丙烯沸石微环境的控制。
DOI:
10.1038/s41467-021-21062-1
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发表时间:
2021-02-05
影响因子:
16.6
通讯作者:
Yang S
中科院分区:
文献类型:
--
作者:
Lin L;Fan M;Sheveleva AM;Han X;Tang Z;Carter JH;da Silva I;Parlett CMA;Tuna F;McInnes EJL;Sastre G;Rudić S;Cavaye H;Parker SF;Cheng Y;Daemen LL;Ramirez-Cuesta AJ;Attfield MP;Liu Y;Tang CC;Han B;Yang S
Optimising the balance between propene selectivity, propene/ethene ratio and catalytic stability and unravelling the explicit mechanism on formation of the first carbon–carbon bond are challenging goals of great importance in state-of-the-art methanol-to-olefin (MTO) research. We report a strategy to finely control the nature of active sites within the pores of commercial MFI-zeolites by incorporating tantalum(V) and aluminium(III) centres into the framework. The resultant TaAlS-1 zeolite exhibits simultaneously remarkable propene selectivity (51%), propene/ethene ratio (8.3) and catalytic stability (>50 h) at full methanol conversion. In situ synchrotron X-ray powder diffraction, X-ray absorption spectroscopy and inelastic neutron scattering coupled with DFT calculations reveal that the first carbon–carbon bond is formed between an activated methanol molecule and a trimethyloxonium intermediate. The unprecedented cooperativity between tantalum(V) and Brønsted acid sites creates an optimal microenvironment for efficient conversion of methanol and thus greatly promotes the application of zeolites in the sustainable manufacturing of light olefins. Lower olefins are mainly produced from fossil resources and the methanol-to-olefins process offers a new sustainable pathway. Here, the authors show a new zeolite containing tantalum and aluminium centres which shows simultaneously high propene selectivity, catalytic activity, and stability for the synthesis of propene.
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影响因子:
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通讯作者:
Bhan, Aditya
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