离心喷雾条件对CeWTi脱硝催化剂性能的影响  

Effect of spraycondition on performance of Ce-W-Ti SCR catalysts

作　　者：丁智勇 李兆强[1,2] 张丞[1,2] 王雨[1,2] 樊蓉蓉 王艳 DING Zhiyong;LI Zhaoqiang;ZHANG Cheng;WANG Yu;FAN Rongrong;WANG Yan(State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization,Baotou Research Institute of Rare Earths,Baotou 014030,N&Mongol,China;National Engineering Research of Rare Earth Metallurgy and Functional Materials,Baotou 014030,Nei Mongol,China)

机构地区：[1]包头稀土研究院白云鄂博稀土资源研究与综合利用国家重点实验室,内蒙古包头014030 [2]瑞科稀土冶金及功能材料国家工程研究中心,内蒙古包头014030

出　　处：《金属功能材料》2021年第4期99-105,共7页Metallic Functional Materials

摘　　要：以离心喷雾干燥技术为基础,采用浸渍法制备了CeO2-WO3/TiO2(CeWTi)脱硝催化剂,研究了制备过程中离心喷雾温度对喷雾速率及催化剂粉体形貌、粒度、比表面积和脱硝性能的影响,分析了喷雾温度影响的机制。结果表明,CeWTi催化剂的离心喷雾速率、粒度均随离心喷雾温度的升高而显著增大,但其焙烧前粉体的粒度却无显著变化,仅为1μm左右。这是由于喷雾干燥后主要形成Ce(NO3)3·4H2O和Ti(W)O2的团聚体,并未形成Ce-W-Ti-O的固溶体。因此,在测试粒度时由于Ce(NO3)3·4H2O的溶解,测得粒度不是喷雾粉体的实际粒度,而是钛钨粉的粒度。The CeO2-WO3/TiO2(CeWTi) SCR catalyst was prepared by impregnation method. Based on the centrifugal spray drying technology, the effects of inlet temperature on catalyst powder morphology, granularity, specific surface area, denitrification performance and spray rate were studied, and the influence mechanism was studied. The results showed that the spray rate and granularity of CeWTi catalyst increased significantly with the inlet spray temperature rising, but no significant change in particle size of the powder before calcination, the particle size was only about 1 μm. This was because the agglomerates of Ce(NO3)3·4 H2O and Ti(W)O2 were formed during spray drying, instead of the solid solution of Ce-W-Ti-O. Due to the dissolution of Ce(NO3)3·4 H2O when detecting granularity, the result was not the actual particle size of the spray powder, but the granularity of Ti(W)O2.

关 键 词：离心喷雾干燥 喷雾温度 CeWTi催化剂 物理性能 

分 类 号：TQ426[化学工程] X701[环境科学与工程—环境工程]