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- W3202160143 endingPage "122075" @default.
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- W3202160143 abstract "Construction of core–shell catalysts is generally considered as an effective strategy for regulating hydrocarbon distribution in Fischer-Tropsch synthesis. Rational design of core–shell catalysts to enhance olefins selectivity is greatly desirable but still challenging. Herein, a series of [email protected](x) catalysts (FeMnK oxide encapsulated in hollow silicalite-1 zeolite) featured with hierarchical shell were elaborately fabricated by “desilication-recrystallization” method in a mixed alkaline solution (x = NaOH/(TPAOH + NaOH)). Hierarchy factor was introduced to quantitatively describe variety of hierarchical zeolite encapsulating structures. In catalytic performance, it was found that the light olefins selectivity attained the maximum at 50.6% over [email protected](0.20) catalyst with space–time yield of light olefins up to 26.7 µmolC2=-C4=.gFe−1.s−1 and performed a monotonicity increase relation with the hierarchy factor. Maximizing the hierarchy factor was beneficial to the formation of light olefins on the as-synthesized catalysts, which may result from the well coordination of shape-selective function and transport efficiency due to the optimally orchestrated porosities. Additionally, the moderate H2 activation capacity, relatively lower olefins desorption energy and the suppressed olefins secondary reaction over [email protected](0.20) catalyst also contribute to the boosted light olefins selectivity. This study sheds new clues for rational catalyst design in direct light olefins synthesis from Fischer-Tropsch synthesis." @default.
- W3202160143 created "2021-10-11" @default.
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- W3202160143 date "2022-02-01" @default.
- W3202160143 modified "2023-10-16" @default.
- W3202160143 title "Rational design of hierarchical zeolite encapsulating FeMnK architecture to enhance light olefins selectivity in Fischer-Tropsch synthesis" @default.
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- W3202160143 doi "https://doi.org/10.1016/j.fuel.2021.122075" @default.
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