高等学校化学学报 ›› 2003, Vol. 24 ›› Issue (7): 1281.

• 论文 • 上一篇    下一篇

Ni-MoOx催化剂上的庚烷异构化

汪颖军, 王新平, 柴松海, 蔡天锡   

  1. 大连理工大学精细化工国家重点实验室, 大连 116012
  • 收稿日期:2002-09-23 出版日期:2003-07-24 发布日期:2003-07-24
  • 通讯作者: 王新平(1958年出生),男,博士,副教授,主要从事催化研究.E-mail:dllgwxp@dlut.edu.cn E-mail:dllgwxp@dlut.edu.cn
  • 基金资助:

    中国石化总公司基金(批准号:X500002)资助

n-Heptane Isomerization over Ni Doped MoOx Catalyst

WANG Ying-Jun, WANG Xin-Ping, CHAI Song-Hai, CAI Tian-Xi   

  1. State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116012, China
  • Received:2002-09-23 Online:2003-07-24 Published:2003-07-24

摘要: 在常压固定床流动体系中研究了Ni-MoOx催化剂对正庚烷异构化反应的催化性能.将质量分数为2%~5%的Ni掺杂于MoO3中可有效地缩短催化剂的还原活化时间,并较大幅度地提高催化剂的比活性.Ni-MoOx催化剂上的正庚烷异构化的反应活化能为35.3kJ/mol,显著低于MoOx催化剂上的活化能(49.3kJ/mol),仅为双功能分子筛催化剂的1/3~1/4.

关键词: 异构化, 正庚烷, 镍调变的钼氧化物, 三氧化钼, 活化能

Abstract: The Ni doped molybdenum oxide(Ni-MoOx) as the catalyst for n-heptane isomerization has been studied in a conventional fixed bed reactor. It is indicated that addition of mass fractions 2%-5% Ni to MoO3 can markedly shorten the reduction period of H2 which is necessary for the formation of active phase Ni-MoOx catalyzing n-heptane isomerization. The relative activity for n-heptane isomerization in terms of unit surface area of the catalyst can be enhanced greatly by addition of Ni as well. On the Ni-MoOx catalyst, the apparent activation energy for n-heptane isomerization is ca. 35.3 kJ/mol, which is obviously lower than 49.3 kJ/mol obtained on MoOx. And it is 1/3-1/4 as low as those of zeolite-based bifunctional catalyst for the n-heptane isomerization.

Key words: Isomerization, n-Heptane, Ni-MoOx, MoO3, Activation energy

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