The 0.4％Pt/xSTA-MIL-101(Cr)metal-acid bifunctional catalysts were prepared by impregnation using STA-MIL-101(Cr)as the support.The synthesized samples were verified to exhibit a typical octahedral structure of MIL-101(Cr)and the pore structure was arranged orderly.The specific surface area of the samples was extremely high and the samples were made of micro-mesoporous composite materials.Silicotungstic acid could retain its Keggin structure in the 0.4％Pt/xSTA-MIL-101(Cr)samples and the catalyst possessed moderately strong Br?nsted acid sites.Besides,the dispersion of Pt particles in MIL-101(Cr)was relatively high.n-Heptane isomerization was first used as a probe to test the novel 0.4％Pt/xSTA-MIL-10(Cr)catalyst.Compared with the conventional silicate catalysts,the catalytic performance of 0.4％Pt/30％STA-MIL-101(Cr)was significantly improved with a n-heptane conversion of 58.93％and an iso-heptane selectivity of 95.68％,respectively,under conditions covering a reaction time of 2 h and a reaction temperature of 260℃.The catalyst could still maintain a relatively high catalytic performance after a reaction time of 5 h.Compared with the non-noble metal catalyst,the catalytic efficiency of 0.4％Pt/30％STA-MIL-101(Cr)is relatively high.The mechanism model of n-heptane isomerization over 0.4％Pt/xSTA-MIL-101(Cr)catalyst was established.

Zhang Wei;Liu Rongjiang;Ma Shoutao;Kuvshinov Dimitriy;Suo Yanhua;Wang Yingjun

Provincial Key Laboratory of College of Polyolefin New Materials,Chemistry and Chemical Engineering,Northeast Petroleum University,Daqing 163318;Daqing Chemical Research Center of PetroChina,Daqing 163714;School of Engineering,University of Hull,UK

中国炼油与石油化工（英文版）

[1]Zhang Wei;Liu Rongjiang;Ma Shoutao;Kuvshinov Dimitriy;Suo Yanhua;Wang Yingjun-.A Novel MIL-101(Cr)Acidified by Silicotungstic Acid and Its Catalytic Performance for Isomerization of n-Heptane)[J].中国炼油与石油化工（英文版）,2022(01):68-80

Acidified,Silicotungstic,Heptane,xSTA

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