Adsorption and diffusion performance of Co-Mo/γ-Al2O3 hydrodesulfurization catalyst

作者：Duan Linhai; Wu Yuye; Du Meiyu; Shao Xinchao; Qin Yucai; Song Lijuan^*

来源：Acta Petrolei Sinica / Petroleum Processing Section, 2013, 29(1): 35-39.

DOI：10.3969/j.issn.1001-8719.2013.01.006

• Adsorption desorption isotherms
• Chemical adsorption
• Gravimetric analyzers
• Hydrodesulfurization catalysts
• Pentene -1
• Physical adsorption
• Saturated adsorption capacity
• Selective hydrodesulfurization

The adsorption-desorption isotherms and temperature-programmed desorption curves of thiophene, pentene-1 and isoprene on selective hydrodesulfurization catalyst Co-Mo/γ-Al2O3 were determined by intelligent gravimetric analyzer (IGA) at 335 K and 373 K, and their diffusion coefficients were also calculated. The results indicated that the saturated adsorption capacities of thiophene, isoprene and pentene-1 on Co-Mo/γ-Al2O3 decreased in turn. The temperature programmed desorption curves of thiophene showed that there were two kinds of adsorption, i.e. physical adsorption and chemical adsorption. And the phase of Co-Mo-S formed by chemical adsorption could effectively improve the desulfurization performance of Co-Mo/γ-Al2O3 catalysts. For pentene-1 and isoprene, there were only one weak adsorption between adsorbent and catalyst. Among the three adsorbents, the relative diffusion coefficient of pentene-1 on Co-Mo/γ-Al2O3 was the largest, while the relative diffusion coefficients of thiophene and isoprene were almost the same.

• 出版日期2013
• 单位辽宁大学