A Novel MIL-101(Cr)Acidified by Silicotungstic Acid and Its Catalytic Performance for Isomerization of n-Heptane  

作　　者：Zhang Wei Liu Rongjiang Ma Shoutao Kuvshinov Dimitriy Suo Yanhua Wang Yingjun 

机构地区：[1]Provincial Key Laboratory of College of Polyolefin New Materials,Chemistry and Chemical Engineering,Northeast Petroleum University,Daqing 163318 [2]Daqing Chemical Research Center of PetroChina,Daqing 163714 [3]School of Engineering,University of Hull,UK

出　　处：《China Petroleum Processing & Petrochemical Technology》2022年第1期68-80,共13页中国炼油与石油化工（英文版）

摘　　要：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 Brønsted 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°C.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.

关 键 词：MIL-101 silicotungstic acid N-HEPTANE ISOMERIZATION PLATINUM 

分 类 号：TE624.9[石油与天然气工程—油气加工工程]