烷基化选择性加氢催化剂失活原因分析及对策OA北大核心

Objective In the sulfuric acid alkylation unit,the main causes and solutions to the deactivation of the hydrogenation catalyst were found by analyzing the running status of the selective hydrogenation reactor of 1,3-butadiene.Methods By analyzing the feedstock properties before and after catalyst deactivation,the effect of feedstock properties changes on the 1,3-butadiene removal rate was investigated.Results For the selective hydrogenation of the 1,3-butadiene catalyst,a high level of pH,caustic sodium and total sulfur contents in feedstock will inhibit the active centers of the catalyst.Conclusion The harmful impurities in feedstock were removed by optimizing operation.Additionally,the deactivated catalysts were re-activated by on-line treatment with pure hydrogen,the catalyst activity was significantly restored and maintained long-cycle running after re-starting up.