Effect of feed composition on isomerization performance of solid acid catalyst
PSZA(Pt/SO42-/ZrO2-Al2O3)solid superacid catalyst was prepared by equal volume impregnation method.Its catalytic isomerization performance of light hydrocarbons was evaluated in a miniature fixed bed reactor.The isomerization performance of n-C5(n-pentane),n-C6(n-hexane)feed containing different impurities on PSZA was investigated.The experimental results show that the ratio of n-C5 and n-C6 mixed feed does not affect their respective conversion rates,and the conversion rate of a single component is comparable.The higher the proportion of i-C5(isopentane)and i-C6(isohexane)in the feed,the lower the conversion rate of n-C5 and n-C6,and the product composition is close to the conversion of n-C5 and n-C6 alone.Methylcyclopentane and benzene can reduce the isomerization activity of n-C5 and n-C6 catalyzed by PSZA.The isomerization activity of PSZA is increased at a high reaction temperature of 180 ℃.n-C7(n-heptane)is completely cleaved on PSZA,and the catalytic activity of n-C5 and n-C6 is not significantly affected by PSZA.
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