[1]朱崇兵,金保升,仲兆平,等.K2O对V2O5-WO3/TiO2催化剂的中毒作用[J].东南大学学报(自然科学版),2008,38(1):101-105.[doi:10.3969/j.issn.1001-0505.2008.01.020]
 Zhu Chongbing,Jin Baosheng,Zhong Zhaoping,et al.Poisoning effect of K2O on V2O5-WO3/TiO2 catalysts[J].Journal of Southeast University (Natural Science Edition),2008,38(1):101-105.[doi:10.3969/j.issn.1001-0505.2008.01.020]
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K2O对V2O5-WO3/TiO2催化剂的中毒作用()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
38
期数:
2008年第1期
页码:
101-105
栏目:
环境科学与工程
出版日期:
2008-01-20

文章信息/Info

Title:
Poisoning effect of K2O on V2O5-WO3/TiO2 catalysts
作者:
朱崇兵1 金保升1 仲兆平1 李锋1 陈玲霞1 翟俊霞12
1 东南大学洁净煤发电及燃烧技术教育部重点实验室,南京 210096; 2 南京工程学院基础部,南京 210013
Author(s):
Zhu Chongbing1 Jin Baosheng1 Zhong Zhaoping1 Li Feng1 Chen Lingxia1 Zhai Junxia12
1 Key Laboratory of Clean Coal Power Generation and Combustion Technology of Ministry of Education, Southeast University, Nanjing 210096, China
2 Department of Basic Course, Nanjing Institute of Technology, Nanjing 210013,China
关键词:
中毒 K2O V2O5-WO3/TiO2催化剂 SCR 脱硝
Keywords:
poisoning K2O V2O5-WO3/TiO2 catalyst SCR DeNOx
分类号:
X51
DOI:
10.3969/j.issn.1001-0505.2008.01.020
摘要:
实验室制备了V2O5-WO3/TiO2的脱硝催化剂,采用模拟中毒法,在此催化剂上负载碱金属氧化物K2O,通过BET,XRD,SEM等方法对微观结构进行表征.在SCR活性试验台上研究不同含量K2O对催化剂脱硝活性,N2O生成率和SO2氧化率的影响.结果发现:K2O对于催化剂的毒性较强,随着添加量的增大,NO脱除率急剧下降,SO2的氧化率大大提高; 较大含量的K2O(nK/nV=1,摩尔比)使催化剂比表面积有所减少,催化剂颗粒发生轻微团聚,微观结构变化不大,但NO的脱除率小于50%(380 ℃),N2O的生成率和SO2的氧化率均增加; K2O通过与V2O5的活性酸性位结合,使催化剂中有效活性位数量大为降低,导致脱硝活性下降.
Abstract:
V2O5-WO3/TiO2 catalysts were prepared and K2O were added on them by simulated poisoning method. To investigate the micro structure of catalyst BET(brurauer-emmett-teller),XRD(X-ray diffraction), and SEM(scanning electron microscope)were employed. Effect of K2O on the DeNOx activity, N2O generation and SO2 oxidation were studied using SCR activity reactor. It has been found that K2O has strong poisoning effect on the catalyst. NO removal efficiency is decreased and SO2 oxidation ratio is increased along with the increase of K2O. When nK/nV=1(mole ratio), surface area of catalyst-BET is decreased, particles aggregate lightly, and there are some changes in micro structure, but NO removal efficiency less than 50%(380 ℃), N2O generation and SO2 oxidation are increased. Depletion of DeNOx efficiency of the catalyst is caused by acid sites of V2O5 bonded with K2O which results in the decrease of the quantity of acid sites.

参考文献/References:

[1] 国家环保总局,国家质量监督检验检疫总局.GB13223—2003 火电厂大气污染排放标准[S].北京:中国环境科学出版社,2003.
[2] Busca Guido,Lietti Luca,Ramis Gianguido,et al.Chemical and mechanistic aspects of the selective catalytic reduction of NOx by ammonia over oxide catalysts:a review [J]. Applied Catalysis B:Environmental,1998(18):1-36.
[3] Pio Forzatti.Present status and perspectives in de-NOx SCR catalysis[J].Applied Catalysis A:General,2001,222(1):221-236.
[4] 许越.催化剂设计与制备工艺[M].北京:化学工业出版社,2003:117-119.
[5] 孙锦宜,林西平.环保催化材料与应用[M].北京:化学工业出版社,2002:123-145.
[6] 张继光.催化剂制备过程技术[M].北京:中国石化出版社,2004:285-287.
[7] 李锋,金保升,刘涛,等.以工业级TiO2为载体负载不同住催化剂V2O5基脱氮催化剂的性能[J].环境化学,2005,24(4):374-378.
  Li Feng,Jin Baosheng,Liu Tao,et al.Study of deNOx behavior of V2O5-based catalyst with different catalyst promoters supported on commercial anatase TiO2[J]. Environmental Chemistry,2005,24(4):374-378.(in Chinese)
[8] Alemany L J,Luis J,Lietti Luca,et al.Reactivity and physico-chemical characterization of V2O5-WO3/TiO2 DeNOx catalysts[J].Journal of Catalysis,1995,155(4):117-130.
[9] Nova Isabella,Lietti Luca,Tronconi Enrico,et al.Dynamics of SCR reaction over TiO2-supported vanadia-tungsta commercial catalyst[J]. Catalysis Today,2000,60(3):73-82.
[10] Marangozis John.Comparison and analysis of intrinsic kinetics and effectiveness factors for the catalytic reduction of NO with ammonia in the presence of oxygen[J].Ind Eng Chem Res,1992,31(4):987-994.
[11] 梁斌,蒋炜,胡俊文.新型整体式钒催化剂的设计、制备与研究[J].化工学报,2006,57(8):1911-1917.
  Liang Bin,Jiang Wei,Hu Junwen.A new structured vanadium catalyst:design,manufacture and measurement[J].Journal of Chemical Industry and Engineering,2006,57(8):1911-1917.(in Chinese)
[12] 郭景芝.关于硫酸生产钒催化剂的几点思考[J].硫酸工业,2005(6):18-23.
  Guo Jingzhi.Think over vanadium catalyst for sulphuric acid production[J]. Sulphuric Acid Industry,2005(6):18-23.(in Chinese)
[13] Gregory W T.Study of supported vanadium oxide catalysts for the selective catalytic reduction of nitrogen oxides[D].Berkeley:University of Califonia,1991.
[14] Chen Jianping.Preparation,characterization and deactivation of the catalysts for the selective catalytic reduction of NO with NH3[D].Baffalo:State University of New York,1993.

备注/Memo

备注/Memo:
作者简介: 朱崇兵(1978—),男,博士生; 金保升(联系人),男,教授,博士生导师,bsjin@seu.edu.cn.
基金项目: 中国博士后科学基金资助项目(2004035090)、东南大学振兴行动计划资助项目.
引文格式: 朱崇兵,金保升,仲兆平,等.K2O对V2O5-WO3/TiO2催化剂的中毒作用[J].东南大学学报:自然科学版
更新日期/Last Update: 2008-01-20