SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2018, Vol. 26 ›› Issue (3): 521-528.DOI: 10.1016/j.cjche.2017.05.022

• Catalysis, Kinetics and Reaction Engineering • 上一篇    下一篇

Benzene selective hydrogenation over supported Ni (nano-) particles catalysts: Catalytic and kinetics studies

M. H. Peyrovi1, N. Parsafard2, Z. Mohammadian1   

  1. 1 Faculty of Chemistry Science and Petroleum, Department of Physical Chemistry, University of Shahid Beheshti, Tehran 1983963113, Iran;
    2 Kosar University of Bojnord, Department of Applied Chemistry, North Khorasan, Iran
  • 收稿日期:2017-02-19 修回日期:2017-05-15 出版日期:2018-03-28 发布日期:2018-04-18
  • 通讯作者: M. H. Peyrovi, N. Parsafard

Benzene selective hydrogenation over supported Ni (nano-) particles catalysts: Catalytic and kinetics studies

M. H. Peyrovi1, N. Parsafard2, Z. Mohammadian1   

  1. 1 Faculty of Chemistry Science and Petroleum, Department of Physical Chemistry, University of Shahid Beheshti, Tehran 1983963113, Iran;
    2 Kosar University of Bojnord, Department of Applied Chemistry, North Khorasan, Iran
  • Received:2017-02-19 Revised:2017-05-15 Online:2018-03-28 Published:2018-04-18
  • Contact: M. H. Peyrovi, N. Parsafard

摘要: This report aims to reduce the benzene in a mixture of benzene and toluene as a model reaction using catalytic hydrogenation. In this research, we developed a series of catalysts with different supports such as Ni/HMS, Ni/HZSM-5, Ni/HZSM5-HMS, Ni/Al2O3 and Ni/SiO2. Kinetic of this reaction was investigated under various hydrogen and benzene pressures. For more study, two kinetic models have also been selected and tested to describe the kinetics for this reaction. Both used models, the power law and Langmuir-Hinshelwood, provided a good fit toward the experimental data and allowed to determine the kinetic parameters. Among these catalysts, Ni/Al2O3 showed the maximum benzene conversion (99.19%) at 130℃ for benzene hydrogenation. The lowest toluene conversion was observed for Ni/SiO2. Furthermore, this catalyst presented high selectivity to benzene (75.26%) at 130℃. The catalytic performance (activity, selectivity and stability) and kinetics evaluations were shown that the Ni/SiO2 is an effective catalyst to hydrogenate benzene. It seems that the surface properties particularly pore size are effective parameter compared to other factors such as acidity and metal dispersion in this process.

关键词: Catalytic hydrogenation, Power law model, Langmuir-Hinshelwood model, Selectivity, Kinetics

Abstract: This report aims to reduce the benzene in a mixture of benzene and toluene as a model reaction using catalytic hydrogenation. In this research, we developed a series of catalysts with different supports such as Ni/HMS, Ni/HZSM-5, Ni/HZSM5-HMS, Ni/Al2O3 and Ni/SiO2. Kinetic of this reaction was investigated under various hydrogen and benzene pressures. For more study, two kinetic models have also been selected and tested to describe the kinetics for this reaction. Both used models, the power law and Langmuir-Hinshelwood, provided a good fit toward the experimental data and allowed to determine the kinetic parameters. Among these catalysts, Ni/Al2O3 showed the maximum benzene conversion (99.19%) at 130℃ for benzene hydrogenation. The lowest toluene conversion was observed for Ni/SiO2. Furthermore, this catalyst presented high selectivity to benzene (75.26%) at 130℃. The catalytic performance (activity, selectivity and stability) and kinetics evaluations were shown that the Ni/SiO2 is an effective catalyst to hydrogenate benzene. It seems that the surface properties particularly pore size are effective parameter compared to other factors such as acidity and metal dispersion in this process.

Key words: Catalytic hydrogenation, Power law model, Langmuir-Hinshelwood model, Selectivity, Kinetics