Hydroisomerization of n-heptane over bimetal-bearing SO2-4/ZrO2 catalysts supported on USY zeolite

WEI Ruiping; WANG Jun; GU Yanbo

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Hydroisomerization of n-heptane over bimetal-bearing SO^2-₄/ZrO₂catalysts supported on USY zeolite

更新时间：2025-12-10

- Hydroisomerization of n-heptane over bimetal-bearing SO^2-₄/ZrO₂catalysts supported on USY zeolite
- CIESC Journal Issue 1, (2007)
- 作者机构：
  
  南京工业大学化学化工学院
- 作者简介：
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- Online First：05 January 2007，
  
  Published：05 January 2007
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WEI Ruiping, WANG Jun, GU Yanbo. Hydroisomerization of n-heptane over bimetal-bearing SO^2-₄/ZrO₂catalysts supported on USY zeolite[J]. CIESC Journal, 2007, (1).
DOI：

WEI Ruiping, WANG Jun, GU Yanbo. Hydroisomerization of n-heptane over bimetal-bearing SO^2-₄/ZrO₂catalysts supported on USY zeolite[J]. CIESC Journal, 2007, (1). DOI：

摘要

用超稳Y沸石（USY）负载SO2-4/ZrO2固体超强酸，并以此为载体制备含Pt双金属催化剂，用XRD和H2-TPR表征了催化剂的物化性质，并在常压固定床反应器上考察催化剂的正庚烷临氢异构化反应性能。结果表明， USY负载了SO2-4/ZrO2和双金属以后仍能保持沸石原有结构；贵金属Pt、金属助剂以及ZrO2等在USY载体上能够高度分散。在含Pt的催化剂中掺杂了Cr或Al金属助剂以后，正庚烷异构化产物选择性有了明显的提高，且具有更好的稳定性和低温活性；在USY负载SO2-4/ZrO2和0.4%Pt的催化剂上，正庚烷的转化率为42.1%时，异构化产物的选择性只有69.6%，而在掺杂了与Pt摩尔比为5∶1的Cr或Al后，正庚烷的转化率分别为44.3%和42.1%时，异构化产物的选择性分别可提高到88.9%和89.5%。

Abstract

The bimetal-bearing SO2-4/ZrO2 superacid catalysts supported on ultra stable Y(USY) zeolite were prepared by impregnation and characterized with XRD and H2-TPR.Their catalytic activities were evaluated in the hydroisomerization of n-heptane with an atmospheric fixed-bed reactor.The USY support well kept its pore structure in catalysts and the metal species were highly dispersed on the support.The Pt-bearing catalysts doped with Cr or Al were catalytically much more stable and exhibited higher catalytic activity and selectivity than the catalysts without dopants.Over the catalyst with a Pt loading of 0.4%(mass) and ZrO2 loading of 10%(mass)

the conversion of n-heptane was 42.1% with a selectivity of only 69.6% for isomerization products

while over the catalysts doped with Cr or Al with a molar ratio of Cr(Al) to Pt 5∶1

the conversion of n-heptane was 44.3% and 42.1% with the selectivity for isomerization products as high as 88.9% and 89.5% respectively.

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