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

被引：0

作者：

Wei, Zhang ^{[1
]}

Rongjiang, Liu ^{[1
]}

Shoutao, Ma ^{[1
,2
]}

Dimitriy, Kuvshinov ^{[3
]}

Yanhua, Suo ^{[1
]}

Yingjun, Wang ^{[1
]}

机构：

[1] Northeast Petr Univ, Coll Polyolefin New Mat Chem & Chem Engn, Prov Key Lab, Daqing 163318, Peoples R China

[2] Daqing Chem Res Ctr PetroChina, Daqing 163714, Peoples R China

[3] Univ Hull, Sch Engn, Kingston Upon Hull, N Humberside, England

来源：

CHINA PETROLEUM PROCESSING & PETROCHEMICAL TECHNOLOGY | 2022年 / 24卷 / 01期

关键词：

MIL-101; silicotungstic acid; n-heptane; isomerization; platinum; METAL-ORGANIC FRAMEWORK; SELECTIVE ISOMERIZATION; SURFACE-ACIDITY; HYDROGENATION; HEXANE;

D O I：

暂无

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

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 Bronsted 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 degrees 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.

引用

页码：68 / 80

页数：13

共 33 条

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