高性能负载型催化填料的制备及其性能研究  

Preparation and performance investigation of high-performance supported catalytic packing

作　　者：王清莲[1,2] 熊佩芸 韩俏飞 叶长燊 王红星[3] 杨臣 邱挺 WANG Qinglian;XIONG Peiyun;HAN Qiaofei;YE Changshen;WANG Hongxing;YANG Chen;QIU Ting(Fujian Universities Engineering Research Center of Reactive Distillation Technology,College of Chemical Engineering,Fuzhou University,Fuzhou 350108,Fujian,China;Qingyuan Innovation Laboratory,Quanzhou 362801,Fujian,China;College of Chemical Engineering and Materials Science,Tianjin University of Science&Technology,Tianjin 300457,China;Grease Branch,Sinopec Lubricant Co.,Ltd.,Tianjin 300480,China)

机构地区：[1]福州大学化工学院,反应精馏福建省高校工程研究中心,福建福州350108 [2]清源创新实验室,福建泉州362801 [3]天津科技大学化工与材料学院,天津300457 [4]中国石化润滑油有限公司润滑脂分公司,天津300480

出　　处：《化工学报》2024年第11期4226-4236,F0003,共12页CIESC Journal

基　　金：国家自然科学基金项目(22278076);福建省自然科学基金重点项目(2022J02019)。

摘　　要：在聚多巴胺辅助二次生长法制备负载型催化填料(SCP)基础上,通过多次晶化及碱处理协同改性,开发了高性能SCP制备方法。研究结果表明,SCP的活性组分层负载量随晶化次数增加而线性增长,但过密的活性组分层结构限制了活性位点的利用。四甲基氢氧化铵(TMAOH)处理通过溶解硅原子形成介孔,提高了外比表面积和扩散效率,增强了SCP的催化活性和焦炭容纳能力。在优化的改性条件下,即晶化次数为3次、TMAOH溶液浓度为0.05 mol/L、碱处理温度为80℃、碱处理时间为120 min,SCP活性提升3.74倍。尽管SCP在乙酸环己酯合成中活性有所下降,但通过焙烧再生可恢复活性。环己烯高温聚合产生的积炭是活性降低的主要原因。Based on the preparation of supported catalytic packing(SCP)by polydopamine-assisted secondary growth method,a high-performance SCP preparation method was developed through multiple crystallization and alkali treatment synergistic modification.It was found that the loading of the active component layer on SCP increases linearly with the number of crystallization steps.However,the excessively dense structure of the active component layer hinders the utilization of active sites.Tetramethylammonium hydroxide(TMAOH)treatment,by dissolving silicon atoms to create mesopores,enhances the external specific surface area and diffusion efficiency,thereby improving the catalytic activity and coke accommodation capacity of SCP.Under the optimized modification conditions,that is,with 3 crystallization times,a TMAOH solution concentration of 0.05 mol/L,an alkaline treatment temperature of 80℃,and an alkaline treatment time of 120 min,the activity of SCP is increased by 3.74 times.Although the activity decreases during the synthesis of cyclohexyl acetate from acetic acid and cyclohexene,the activity can be restored through calcination regeneration.The coke resulting from the hightemperature polymerization of cyclohexene is the primary cause of activity reduction.

关 键 词：催化精馏 催化填料 反应 失活 再生 

分 类 号：TQ032.4[化学工程]