以水热合成针铁矿为前驱体浸渍偏钒酸铵,分别于300,400和500℃空气中焙烧,制备了不同活性组分负载量的V2O5/赤铁矿(V/H)催化剂,用于氨选择性催化还原(SCR)脱硝.采用X射线衍射、透射电子显微镜、比表面积分析仪、程序升温还原及程序升温脱附等方法对催化剂结构进行了表征,并用标气配制模拟烟气进行了脱硝实验.结果表明,300℃煅烧3%V/H催化剂当烟气温度为250-300℃时NO转化率均可达95%以上;当配气中单独加入水蒸气或低浓度SO2 (0.01%)时,V/H催化脱硝的活性不受影响;当系统加入高浓度的SO2 (0.03%与0.05%)或同时添加H2O与SO2时,SCR脱硝效率下降,其机制可能是SO2在催化剂表面竞争吸附所致,停止添加后,催化活性迅速恢复.
参考文献
[1] | 刘福东,单文坡,石晓燕,张长斌,贺泓.用于NH3选择性催化还原NO的非钒基催化剂研究进展[J].催化学报,2011(07):1113-1128. |
[2] | Busca G;Lietti L;Ramis G;Berti F .[J].Applied Catalysis B: Environmental,1998,18:1. |
[3] | Roy S;Hegde M S;Madras G .[J].Applied Energy,2009,86:2283. |
[4] | Schaefer-Sindlinger A;Pfeifer M;Spurk P;Demel Y,Kreuzer T,Lox E .[P].US 6843971B2,2005. |
[5] | Iwasaki M;Yamazaki K;Banno K;Shinjoh H .Characterization of Fe/ZSM-5 DeNO(x) catalysts prepared by different methods: Relationships between active Fe sites and NH3-SCR performance[J].Journal of Catalysis,2008(2):205-216. |
[6] | Long R Q;Yang R T .[J].Journal of Catalysis,2002,207:224. |
[7] | Schwidder M;Heikens S;De Toni A;Geisler S;Berndt M;Bruckner A;Grunert W .The role of NO2 in the selective catalytic reduction of nitrogen oxides over Fe-ZSM-5 catalysts: Active sites for the conversion of NO and of NO/NO2 mixtures[J].Journal of Catalysis,2008(1):96-103. |
[8] | Brandenberger S;Kr(o)cher O;Tissler A;Althoff R .[J].Applied Catalysis B: Environmental,2010,95:348. |
[9] | Qi G;Yang R T .[J].Catalysis Letters,2005,100:243. |
[10] | Liu F D;He H;Zhang C B.[J].Chemical Communications,2008:2043. |
[11] | 杨兴业,李斌,孙亮,黄志伟,成晓敏,张韬伟,唐幸福.α-Fe2O3表面结构对NH3选择性催化还原NO活性的影响[J].物理化学学报,2012(01):184-188. |
[12] | Apostolescu N;Geiger B;Hizbullah K;Jan M T Kureti S Reichert D Schott F Weisweiler W .[J].Applied Catalysis B: Environmental,2006,62:104. |
[13] | Schwertmann U;Taylor R M;Dixon J B;Weed S B,Dinauer R C.Minerals in Soil Environments[M].Madison,Wisconsin:Soil Science Society of America,1989:379. |
[14] | Cornell R M;Schwertmann U.The Iron Oxides:Structure,Properties,Reactions,Occurences and Uses[M].Weinheim:WILEYVCH GmbH and Co.KGaA,2003 |
[15] | 孙莉,楚之潮.安徽省铁帽型金银矿床地质特征、成矿条件及其评价准则研究[J].安徽地质,2006(02):94-100. |
[16] | Naono H;Nakai K;Sueyoshi T;Yagi H .[J].Journal of Colloid and Interface Science,1987,120:439. |
[17] | Liu H B;Chen T H;Xie Q Q;Zou X H Qing C S Frost R L .[J].Thermochimica Acta,2012,545:20. |
[18] | 邹雪华,陈天虎,刘海波,陈冬,张萍,谢巧勤.热处理针铁矿的结构与色度演化[J].硅酸盐学报,2013(05):669-673. |
[19] | ParkT S;Jeong S K;Hong S H;Hong S C .[J].Industrial & Engineering Chemistry Research,2001,40:4491. |
[20] | 唐晓龙,郝吉明,徐文国,李俊华.新型MnOx催化剂用于低温NH3选择性催化还原NOx[J].催化学报,2006(10):843-848. |
[21] | Huang JH;Tong ZQ;Huang Y;Zhang JF .Selective catalytic reduction of NO with NH3 at low temperatures over iron and manganese oxides supported on mesoporous silica[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2008(3/4):309-314. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%