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Iranian Journal of Chemical Engineering، جلد ۱۸، شماره ۲، صفحات ۱۹-۳۰
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عنوان انگلیسی The Effect of the Method of Adding Impregnation Solutions on the Properties and Performance of the Pd-Ag/Al2O3 Catalyst in the Tail-End Acetylene Selective Hydrogenation.
چکیده انگلیسی مقاله The impregnation of the alumina support with the PdCl2 solution was investigated in batch and semi-batch operation modes using a recycle packed-bed reactor. The UV-visible analysis was used to evaluate the kinetics of the adsorption of Pd on the alumina support. The adsorption data related to transient palladium showed that the adsorption of Pd was very rapid and completed within few minutes. Bi-metallic Pd-Ag/Al2O3 catalysts were synthesized by the sequential impregnation method. CO-chemisorption, CO-TPD and FE-SEM tests were used to characterize the synthesized bi-metallic samples. The catalytic performance of the samples was evaluated for the tail-end acetylene selective hydrogenation process in a fixed-bed reactor. Moreover, the deactivation of the catalysts was evaluated mathematically by the integral method of analysis, considering reaction kinetics as power laws in terms of nth orders in H2 and C2H2 partial pressures. It was observed that by the batch-wise addition of the Pd precursor solution, a sample, with the lowest amount of Pd dimmers that had the highest ethylene selectivity and lowest hydrogenation reaction rate, was obtained.
کلیدواژه‌های انگلیسی مقاله Palladium catalyst,Impregnation,Recycle Reactor,Acetylene Selective Hydrogenation
نویسندگان مقاله M. Takht Ravanchi |
Catalyst Research Group, Petrochemical Research and Technology Company, National Petrochemical Company, Tehran, Iran

S. Sahebdelfar |
Catalyst Research Group, Petrochemical Research and Technology Company, National Petrochemical Company, Tehran, Iran

M. Rahimi Fard |
Catalyst Research Group, Petrochemical Research and Technology Company, National Petrochemical Company, Tehran, Iran

H. Moosavi |
Catalyst Research Group, Petrochemical Research and Technology Company, National Petrochemical Company, Tehran, Iran

نشانی اینترنتی https://www.ijche.com/article_144319_1a380b62373ed3d9d9d4b585f53dd7c1.pdf
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