SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2021, Vol. 38 ›› Issue (10): 165-171.DOI: 10.1016/j.cjche.2020.08.039

• Catalysis, Kinetics and Reaction Engineering • Previous Articles     Next Articles

Promoting di-isobutene selectivity over ZnO/ZrO2-SO4 in isobutene oligomerization

Jiyuan Li1, Mifen Cui1, Zhuxiu Zhang1, Xian Chen1, Qing Liu1, Zhaoyang Fei1, Jihai Tang1,2, Xu Qiao1,2   

  1. 1. State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China;
    2. Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing 210009, China
  • Received:2020-06-10 Revised:2020-08-04 Online:2021-12-02 Published:2021-10-28
  • Contact: Zhuxiu Zhang, Jihai Tang
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (21676141, 21808104), the National Key Research and Development Program of China (2017YFB0307304), the Natural Science Foundation of Jiangsu Province (BK20170989), the Natural Science Foundation of Jiangsu Higher Education Institutions of China (17KJB530005), the Project “333” of Jiangsu Province (BRA2016418) and the Six Major Talent Peak Project of Jiangsu Province (XCL-017).

Promoting di-isobutene selectivity over ZnO/ZrO2-SO4 in isobutene oligomerization

Jiyuan Li1, Mifen Cui1, Zhuxiu Zhang1, Xian Chen1, Qing Liu1, Zhaoyang Fei1, Jihai Tang1,2, Xu Qiao1,2   

  1. 1. State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China;
    2. Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing 210009, China
  • 通讯作者: Zhuxiu Zhang, Jihai Tang
  • 基金资助:
    This work was supported by the National Natural Science Foundation of China (21676141, 21808104), the National Key Research and Development Program of China (2017YFB0307304), the Natural Science Foundation of Jiangsu Province (BK20170989), the Natural Science Foundation of Jiangsu Higher Education Institutions of China (17KJB530005), the Project “333” of Jiangsu Province (BRA2016418) and the Six Major Talent Peak Project of Jiangsu Province (XCL-017).

Abstract: Isooctane attracts great interest in recent years because of its promising potential as friendly-environmental gasoline, which is obtained by dimerization of isobutene with a hydrogenation step. Herein, a solid acid catalyst sulfated zirconia modified by ZnO was prepared. The oligomerization of isobutene had been investigated over ZrO2-SO4 and ZnO(X)/ZrO2-SO4 catalyst in order to find efficient catalysts for the production of isobutene oligomers. The presence of ZnO obviously enhanced the dimerization of isobutene and ZnO(X)/ZrO2-SO4 exhibited the highest di-isobutene yield of 60%. Kinetic studies showed the higher trimerization-to-dimerization activation energy ratios of ZnO(X)/ZrO2-SO4 than those of ZrO2-SO4 from 353 to 393 K. In addition, reaction rate of dimerization was higher than trimerization over ZnO(X)/ZrO2-SO4. The high L/B ratio manifested the capability to enhance the selectivity of C8 in isobutene dimerization. Furthermore, ZnO(X)/ZrO2-SO4 exhibited stable conversion for the dimerization of isobutene.

Key words: Sulfated zirconia, Zinc oxide, Isobutene, Selectivity, Chemical reaction, Catalysis

摘要: Isooctane attracts great interest in recent years because of its promising potential as friendly-environmental gasoline, which is obtained by dimerization of isobutene with a hydrogenation step. Herein, a solid acid catalyst sulfated zirconia modified by ZnO was prepared. The oligomerization of isobutene had been investigated over ZrO2-SO4 and ZnO(X)/ZrO2-SO4 catalyst in order to find efficient catalysts for the production of isobutene oligomers. The presence of ZnO obviously enhanced the dimerization of isobutene and ZnO(X)/ZrO2-SO4 exhibited the highest di-isobutene yield of 60%. Kinetic studies showed the higher trimerization-to-dimerization activation energy ratios of ZnO(X)/ZrO2-SO4 than those of ZrO2-SO4 from 353 to 393 K. In addition, reaction rate of dimerization was higher than trimerization over ZnO(X)/ZrO2-SO4. The high L/B ratio manifested the capability to enhance the selectivity of C8 in isobutene dimerization. Furthermore, ZnO(X)/ZrO2-SO4 exhibited stable conversion for the dimerization of isobutene.

关键词: Sulfated zirconia, Zinc oxide, Isobutene, Selectivity, Chemical reaction, Catalysis