| V2O5/TiO2催化剂中毒机理的试验研究 |
| |
| 引用本文： | 杜振,付银成,朱跃.V2O5/TiO2催化剂中毒机理的试验研究[J].环境科学学报,2013,33(1):216-223. |
| |
| 作者姓名： | 杜振 付银成 朱跃 |
| |
| 作者单位： | 1. 华电电力科学研究院,杭州,310030
2. 能源清洁利用国家重点实验室浙江大学,杭州,310027 |
| |
| 基金项目： | 中国华电工程(集团)有限公司科技项目(No.CHEC-KJ-2011-39) |
| |
| 摘 要： | 选择性催化还原(SCR)催化剂是SCR烟气脱硝技术的核心,是整个SCR系统脱硝效率和经济性的决定因素.本文工作的主要研究思路是以钒钛SCR催化剂为研究对象,研究了H2O和SO2,以及相同含量下K、Na、Ca、Pb的氧化物对钒钛催化剂NO转化率的影响.H2O的存在会抑制V2O5/TiO2催化剂脱硝活性,而SO2在一定程度上促进(V2O5/TiO2)催化剂的SCR脱硝反应,提高NO转化率;碱金属K对钒钛催化剂的钝化作用都是最强,K2O和Na2O的掺入会抑制钒钛催化剂上V2O5的还原能力,而CaO和PbO的掺入对钒钛催化剂上V2O5的还原能力影响较小.
|
| 关 键 词： | 氮氧化物 V2O5/TiO2 催化剂活性 中毒 |
| 收稿时间： | 2012/3/21 0:00:00 |
| 修稿时间： | 2012/6/14 0:00:00 |
Study of poisoning mechanism for V2O5/TiO2 catalyst |
| |
| DU Zhen,FU Yincheng and ZHU Yue.Study of poisoning mechanism for V2O5/TiO2 catalyst[J].Acta Scientiae Circumstantiae,2013,33(1):216-223. |
| |
| Authors: | DU Zhen FU Yincheng and ZHU Yue |
| |
| Institution: | Huadian Electric Power Research Institute, Hangzhou 310030;State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027;Huadian Electric Power Research Institute, Hangzhou 310030 |
| |
| Abstract: | SCR catalysts affect the NOx removal efficiency and the cost of the whole SCR system, thus playing a pivotal role in SCR technology. This study therefore focuses on V2O5/TiO2 SCR catalysts. The effects of H2O, SO2, and oxides of K, Na, Ca and Pb on the NO conversion of V2O5/TiO2 catalysts were studies. The results showed that the presence of H2O decreased the denitration activity of V2O5/TiO2 catalysts. SO2 promoted the SCR DeNOx reaction of V2O5/TiO2 catalysts to a certain extent, and improved the NO conversion rate. Potassium had the strongest poisoning effect on the catalysts among all four metals in form of either oxides or salts. K2O and Na2O might inhibit the reducing capability of V2O5 on the surface of V2O5/TiO2 catalyst, while CaO and PbO had little effect on the reducing capability of V2O5. |
| |
| Keywords: | nitric oxide V2O5/TiO2 catalyst activity poisoning |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《环境科学学报》浏览原始摘要信息 |
| 点击此处可从《环境科学学报》下载免费的PDF全文 |
|
