Reactivation and Reuse of a Hydrotreating Spent Catalyst for Cyclohexene Conversion |
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Authors: | H. S. Ahmed M. F. Menoufy |
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Affiliation: | Refining division, Egyptian Petroleum Research Institute, Nasr City, Cairo, Egypt |
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Abstract: | A comparative study has been made on the efficiency of leaching, using different concentrations of oxidized oxalic acid, and thermally treating techniques to reactivate a Ni‐Mo‐spent hydrotreating catalyst. The reactivation of the treated catalysts was performed in a pulse microcatalytic reactor under atmospheric pressure of hydrogen and reaction temperatures ranging from 250 °C to 450 °C using cyclohexene as model hydrocarbon. The studies revealed that a decoking spent catalyst after leaching using a low concentration (2 %) enhanced its physical characteristics (surface area and average pore diameter) and catalytic activity towards maximum cyclohexene hydrogenation and hydroisomerization reactions at 300 °C and 350 °C, respectively. |
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Keywords: | Activity tests Cyclohexene hydroconversion Decoked catalyst Leaching agent solutions Oxidized oxalic acid Reactivation Spent catalysts |
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