Effect of textural properties of Ni (Nano)-supported catalysts on the selective benzene hydrogenation in the vapor phase
الموضوعات : Iranian Journal of Catalysis
Nastaran Parsafard
1
(Department of Applied Chemistry, Kosar University of Bojnord, Bojnord, Iran.)
Mohammad Hasan Peyrovi
2
(Department of Petroleum Chemistry and Catalysis, Faculty of Chemistry and Petroleum Sciences, University of Shahid Beheshti, Tehran, 1983963113, Iran.)
Mahdi Abdali Hajiabadi
3
(Department of Petroleum Chemistry and Catalysis, Faculty of Chemistry and Petroleum Sciences, University of Shahid Beheshti, Tehran, 1983963113, Iran.)
الکلمات المفتاحية: Stability, Activity, Selectivity, Hydrogenation, Nano porous catalysts, Coke deposition,
ملخص المقالة :
Ni catalysts supported on Nano porous catalysts were prepared by the impregnation method and tested for vapor phase hydrogenation of benzene. The textural and physico-chemical properties of Ni catalysts were characterized by the X-ray diffraction, Fourier-transform infrared spectroscopy, scanning electron microscope and N2 adsorption-desorption analysis. The catalytic evaluation revealed that the best selectivity to benzene (> 84%) and high stability with the low coke deposition (< 1.1%) are related to Ni/Folded Sheets Mesoporous Materials-No. 16. The kinetics of benzene hydrogenation has been examined as a function of benzene and hydrogen pressures at various temperatures. Two kinetic models based on power law and Langmuir-Hinshelwood mechanisms were developed for the reaction and compared with the obtained experimental data. The apparent kinetic parameters were estimated using the multiple regression analysis. Both these models present the good results.
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