Synthesis of Pt/PMA-MIL-101 Catalyst and Its Performance in n-Heptane Isomerization  

作　　者：Zhang Wei Guo Qiang Wang Yingjun Suo Yanhua Lin Wenqiu Hu Tengyu Li Tong Liu Shetian 

机构地区：[1]Provincial Key Laboratory of College of Polyolefin New Materials,College of Chemistry and Chemical Engineering,Northeast Petroleum University,Daqing 163318,China [2]College of Chemical Engineering and Technology,Yantai Nanshan University,Yantai 265706,China

出　　处：《China Petroleum Processing & Petrochemical Technology》2024年第3期63-72,共10页中国炼油与石油化工（英文版）

基　　金：National Natural Science Foundation of China(Grant No.22272129).

摘　　要：Hydroisomerization of n-heptane is an efficient method for producing gasoline with a high octane number.The focus of this study was to find a highly efficient catalyst that could both promote the conversion of n-heptane and inhibit the cracking side reaction.MIL-101(Cr)is a chromium-based metal-organic framework(MOF)with good hydrothermal stability,and exhibits a three-dimensional pore structure that is similar to that of zeolites.Using phosphomolybdic acid(PMA;H3PMo12O40·xH2O)can increase the number of Brønsted acid sites on MIL-101(Cr),which contributes to improving the catalytic performance during isomerization.In this study,0.4%Pt/PMA-MIL-101(Cr)catalyst was successfully crystallized at 220℃using a hydrothermal synthetic method.The results showed that the synthesized samples were mesoporousmicroporous composite materials with the typical octahedral structure,and the MIL-101(Cr)framework was not damaged following modification with PMA.It was found that 0.4%Pt30%PMA-MIL-101(Cr)exhibited the best performance for isomerization of n-heptane,with a conversion rate and selectivity at 260°C of 47.6%and 96.6%,respectively.After five hours of reaction,the conversion rate and selectivity of the catalyst remained above 38%and 80%,respectively.

关 键 词：MIL-101(Cr) N-HEPTANE ISOMERIZATION phosphomolybdic acid CATALYSIS 

分 类 号：TE624.9[石油与天然气工程—油气加工工程]