VPO-Ce/TiO_(2)催化剂低温脱硝性能研究  

Performance Study of VPO-Ce/TiO_(2) Low-temperature Denitration Catalyst

作　　者：田迎春 彭永丽 陈勇 蒋进 贾勇 TIAN Yingchun;PENG Yongli;CHEN Yong;JIANG Jin;JIA Yong(School of Civil Engineering,Ma’anshan University,Ma’anshan 243100,China;School of Energy and Environment,Anhui University of Technology,Ma’anshan 243002,China)

机构地区：[1]马鞍山学院建筑工程学院,安徽马鞍山243100 [2]安徽工业大学能源与环境学院,安徽马鞍山243002

出　　处：《宁波工程学院学报》2023年第2期6-12,共7页Journal of Ningbo University of Technology

基　　金：安徽省高校自然科学研究项目(KJ2018A0638);安徽省年度高校优秀青年人才支持计划项目(gxyq2019165)。

摘　　要：针对低温烟气脱硝过程中SO_(2)和水蒸气严重影响催化剂的活性的问题,制备了Ce掺杂的Ti基磷酸氧钒催化剂(VPO-Ce/TiO_(2)),并对其在低温下脱硝性能进行了研究。实验结果表明:Ce掺杂使VPO/TiO_(2)催化剂的比表面积由6.8 m^(2)/g提高到10.7 m^(2)/g,催化剂中V^(5+)和V4^(+)的H_(2)-TPR还原峰分别由原来的578℃和616℃偏移到538℃和601℃;同时,VPO-Ce/TiO_(2)的脱硝率在250℃时可达到96.8%。与未掺杂Ce的催化剂相比,最佳活性对应的温度点向低温方向偏移了50℃,并且具有同时抗硫抗水性能。In the process of low-temperature flue gas denitration,SO_(2)and water vapor seriously affect the activity of the catalyst.In view of this issue,a series of Ce-doped Ti-based vanadium phosphorus oxide(VPO-Ce/TiO_(2))catalysts were prepared by the method of impregnation and their denitrification performance at low temperature was studied.The results showed that upon the Ce addition,the specific surface area of VPO/TiO_(2)catalyst increased from 6.8 to 10.7 m^(2)/g,and the reduction peaks of V^(5+)and V^(4+)on H_(2)-TPR spectra were shifted from 578℃and 616℃to 538℃and 601℃,respectively.At the same time,the denitration rate of the optimal catalyst was 96.8%at 250℃.Compared with the catalyst without Ce,the optimal reaction temperature was lowered by 50℃,whereas the catalyst holds good sulfur and water resistance abilities.

关 键 词：低温脱硝 CE掺杂 比表面积 抗硫抗水 

分 类 号：X511[环境科学与工程—环境工程]