乙炔
催化作用
焦炭
乙烯
化学
氢
反应速率常数
催化剂中毒
反应级数
动力学
无机化学
催化剂载体
有机化学
物理
量子力学
作者
Maryam Takht Ravanchi,Saeed Sahebdelfar,Maryam Rahimi Fard,Siavash Fadaeerayeni,Peyman Bigdeli
标识
DOI:10.1002/ceat.201400526
摘要
Abstract The selective hydrogenation of acetylene to ethylene over Pd‐Ag/ α ‐Al 2 O 3 catalysts prepared by different impregnation/reduction methods was studied. The best catalytic performance was achieved with the sample prepared by sequential impregnation. A kinetic model based on first order in acetylene and 0.5th order in hydrogen for the main reaction and second‐order independent decay law for catalyst deactivation was used to fit the conversion time data and to obtain quantitative assessment of catalyst performances. Fair fits were observed from which the reaction and deactivation rate constants were evaluated. Coke deposition amounts showed a good correlation with catalyst deactivation rate constants, indicating that coke formation should be the main cause of catalyst deactivation.
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