欢迎访问过程工程学报, 今天是

过程工程学报 ›› 2019, Vol. 19 ›› Issue (3): 465-472.DOI: 10.12034/j.issn.1009-606X.218280

• 综述 • 上一篇    下一篇

氧化铝载体改性及其应用研究进展

孙克宁1, 马茜茜1, 侯瑞君1*, 李敏香1, 张春刚2   

  1. 1. 北京理工大学化学与化工学院,北京 100081 2. 中国石油天然气股份有限公司大庆石化分公司,黑龙江 大庆 163000
  • 收稿日期:2018-09-06 修回日期:2018-11-14 出版日期:2019-06-22 发布日期:2019-06-20
  • 通讯作者: 孙克宁
  • 基金资助:
    国家自然科学基金项目;中国石油科技创新基金项目

Research progress in modification of alumina support and its application

Kening SUN1, Xixi MA1, Ruijun HOU1*, Minxiang LI1, Chungang ZHANG2   

  1. 1. Beijing Institute of Technology University, School of Chemistry and Chemical Engineering, Beijing 100081, China 2. Petro China Daqing Petrochemical Company, Daqing, Heilongjiang 163000, China
  • Received:2018-09-06 Revised:2018-11-14 Online:2019-06-22 Published:2019-06-20
  • Contact: SUN ke-ning

摘要: 氧化铝不仅价格低廉、易获取,且具有多孔性、大比表面积、高分散性、高热稳定性等优点,常用作催化剂载体,广泛应用于工业催化领域。氧化铝的孔结构对工业催化剂性能影响很大。为优化氧化铝载体的性能,对氧化铝的扩孔和添加助剂改性已进行了大量研究。扩孔改性可降低扩散阻力并改善传质、提高活性位点的有效利用率、增强抗结焦性能,进而提高加氢催化的产率;添加助剂改性可有效抑制氧化铝载体高温烧结和相变,防止孔结构被破坏,提高催化剂的寿命。本工作介绍了制备氧化铝的方法?拟薄水铝石脱水法和溶胶?凝胶法,综述了氧化铝的扩孔方法,总结了改性氧化铝载体的最新研究进展,包括自组装法、水热处理法、扩孔剂法;阐述了氧化铝添加助剂的改性方法,包括加入稀土金属氧化物、碱(土)金属氧化物、其它金属氧化物及非金属氧化物。最后,展望了氧化铝未来的研究和发展方向。

关键词: 载体, 氧化铝, 制备, 活性

Abstract: Alumina, which is not only inexpensive and easy to obtain, but also has many advantages such as porosity, large specific surface area, high dispersibility and high thermal stability. Therefore, alumina is often used as catalyst carrier and widely used in the catalysis of petroleum industry. The pore structure of alumina has a great influence on the catalytic reaction of the catalyst, especially in mass transfer. In order to optimize the performance of alumina carrier, a lot of studies have been carried out on the pore expansion of alumina and the modification of alumina by adding additives. Pore enlargement can not only reduce the material diffusion resistance and improve mass transfer, but also improve the effective utilization of active sites and enhance the anti-coking performance. Thus, the yield of hydrogenation catalysis can be increased. The high temperature sintering and phase transformation of alumina support can be effectively inhibited by the addition of catalyst support modified by additives. In this way, the pore structure can be prevented from being destroyed and the service life of the catalyst can be prolonged. In this work, the methods for preparing alumina were pseudo boehmite dehydration and sol?gel method. Pore expanding methods of alumina, including self-assembly method, hydrothermal treatment method and pore expanding agent method, were reviewed. The modification methods of alumina additives were described, including rare earth metal oxides, alkali (earth) metal oxides, other metal oxides and non-metal oxides. The latest research progress of modified alumina carriers was summarized. Finally an outlook for the future research and development of alumina as catalyst support was given. The existing modification methods of alumina still cannot meet the market demand. The preparation of alumina carriers for specific reactions is still the main research content at present. Four key aspects of future research on alumina carriers were proposed.

Key words: support, alumina, preparation, reactivity