石油与天然气化工2024，Vol.53Issue(2)：9-14,27,7.DOI:10.3969/j.issn.1007-3426.2024.02.002
废润滑油加氢催化剂失活机理研究
Study on the deactivation mechanism of waste lubricating oil hydrogenation catalyst
摘要
Abstract
Objective The aim is to study the deactivation mechanism of waste lubricating oil hydrogenation catalyst.Methods Taking NiMo/γ-Al2O3 catalyst as the research object,the catalyst and oil before and after hydrogenation were characterized and analyzed,so as to find out the cause of catalyst deactivation.Results The catalyst showed superior initial hydrogenation activity,and the removal rates of sulfur(S),nitrogen(N)and chlorine(Cl)could reach 83.6％,81.7％,and 99.7％,respectively.However,with the progress of the reaction,the activity of the catalyst decreased seriously from the 4th week.The characterization of the catalyst before and after the reaction showed that the specific surface area and pore volume of the catalyst decreased significantly after the reaction,and the silicon content in the catalyst composition increased significantly after the reaction.Conclusions The reason for the decrease of catalyst activity was neither the loss of active metal nanoparticles,nor the damage of catalysts microstructure,but with the hydrogenation reaction,the silicon in the oil was gradually deposited on the catalyst surface after hydrogenation,resulting in the active site being covered and unable to contact with the reactants.On the other hand,the accumulation of silicon in the fixed bed pipeline limited the mass transfer and heat transfer efficiency,and reduced the reactivity.关键词
废润滑油/加氢/失活/硅中毒/Ni-Mo催化剂Key words
waste lubricating oil/hydrogenation/deactivation/silicon poisoning/Ni-Mo catalyst引用本文复制引用
王成,吴伟,奚亮,李海明,王福江,张鹏..废润滑油加氢催化剂失活机理研究[J].石油与天然气化工,2024,53(2):9-14,27,7.基金项目
国家自然科学基金"Ni/ZnMOx复合脱硫剂设计、制备及其在焦炉煤气深度脱硫中的应用研究"(22072173) （22072173）
国家自然科学基金"低甲烷化Ni/ZnO催化剂的可控合成及其深度脱除焦炉煤气中硫化物的机理研究"(21603256) （21603256）
国家自然科学基金"煤基环烷烃润滑油的合成与摩擦学特性研究"(U1910202) （U1910202）
山西省重点研发计划"高品质的环烷烃润滑基础油制备技术"(202102090301005) （202102090301005）
师市重大科技揭榜挂帅项目"生物可降解塑料PBS关键技术的研究开发与示范"(2022JB02) （2022JB02）
