超声强化废SCR催化剂浸出V和W的研究  

Ultrasound assisted enhancement in vanadium and tungsten leaching from waste SCR catalyst

作　　者：张琛[1] 刘建华[1] 杨晓博[1] 吴凡 夏启斌[1] 李忠[1] 

机构地区：[1]华南理工大学化学与化工学院,广州510640 [2]江苏肯创环境科技股份有限公司,江苏常州213161

出　　处：《功能材料》2015年第20期20063-20067,共5页Journal of Functional Materials

基　　金：广东省科技计划资助项目(2011B010100030);江苏省科技支撑计划(工业)资助项目(BE2012064)

摘　　要：废SCR催化剂的V和W的回收再利用具有巨大的社会、环境和经济效益。研究了碳酸钠焙烧-水浸法回收废SCR催化剂中的V和W,并引入超声波对浸出过程进行强化,同时还考察了超声时间、液固比、超声功率对超声浸出率的影响。结果表明,相对于常规搅拌浸出,超声强化提高了V和W的浸出率,缩短了浸出时间,超声浸出3 min时V的浸出率为76.92%,W的浸出率为69.87%,比常规搅拌条件下的分别提高23.08%和2.59%。超声强化浸出最佳工艺条件为超声时间90 min,液固比12∶1,超声功率500 W,最终V和W的浸出率分别为89.01%和96.05%。废SCR催化剂的V、W的溶解动力学符合Stumm方程,其中V的溶解反应属于一级反应,W的溶解反应属于二级反应。Recovery of valuable metals such as vanadium and tungsten from waste SCR catalyst provides significant important social,environmental and economic benefits.A process was developed for V and W recovery from SCR catalyst by using soda roasting and water leaching intensified by ultrasonic wave.The effects of ultrasonic time,ultrasonic power,liquid-solid ratio on the leaching rate were investigated.Results showed that ultrasound-assisted leaching method was more efficient for V and W recovery than conventional stirring leaching method.The leaching rates of V and W enhanced with ultrasound energy were reached at 76.92%and 69.87%respectively for 3min.The leaching rates increased by 23.08%and 2.59%compared with the conventional stirring leaching for 3min.The maximum leaching rates of V and W reached at 89.01%and 96.05%respectively.The optimum conditions for the process are 2hultrasonic leaching time,liquid-solid ratio of 12∶1,and ultrasonic power of 500 W.The dissolution kinetics curves of V and W from SCR catalysts could be well fitted by the Stumm model.The dissolve of V was a first-order reaction,while the dissolve of W was a second order reaction.

关 键 词：SCR催化剂 回收 超声 浸出 

分 类 号：X773[环境科学与工程—环境工程]