学术
添加硫酸根对燃煤电厂V_2O_5基脱硝催化剂性能的影响
陈玲霞[1,2] 金保升[1] 李锋[1] 朱崇兵[1] 刘涛[1]
[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]南通职业大学,南通226001
摘 要:
采用浸渍法分别制得活性物质V_2O_5的含量均为1％和SO_4^2-的含量不同的催化剂，并通过实验研究了添加SO_4^2-对燃煤电厂SCR法脱硝技术中V_2O_5基催化剂活性和热稳定性的影响，在固定床反应器上，在NH3／NO_x物质的量比为1.0和模拟烟气流量为72 L·h^-1条件下，对几种催化剂的活性进行了测试，结果显示，当负载加入5.01％的SO_4^2-或使用含有8.91％的SO_4^2-载体制备催化剂时，催化剂的活性提高最为显著；在TGA 92热重-差热分析仪上对这两种催化剂进行了热重实验，结果表明，添加的硫酸根对催化剂的热稳定性也有一定提高，且不会影响电厂SCR催化剂的使用。[著者文摘]
文章出处:
《环境科学学报》-2008年28卷2期 -294-298页
栏目信息:
分 类 号:
文献标识码:
A
文章编号:
0253-2468（2008）02-294-05
Effect of added SO_4^2- on the performance of V_2O_5-based deNO_x catalysts
CHEN Lingxia,JIN Baosheng,LI Feng,ZHU Chongbing,LIU Tao（1.Key Laboratory of Clean Coal Power Generation and Combustion Technology of Ministry of Education, Southeast University, Nanjing 210096; 2.Nantong Vocational College, Nantong 226001）
Abstract:
Catalysts with the same V_2O_5 content and different SO_4^2- contents were produced. Their DeNO_x activities were experimentally investigated in a fixed-bed reactor where the mole ratio of NH_3/NO_x was 1.0 and the simulated flue gas flux was 72 L·h^-1. The results showed that the deNO_x activity was most enhanced when the mole ratio of the loading SO_4^2- was 5.01% or the added SO_4^2- in the TiO_2 carrier was 8.91%. Thcrmogravimetric analysis was used to test the thermal stabilities of three catalysts. The added SO_4^2- also enhanced the thermal stability of the catalysts, which would not affect the working of selective catalytic reduction （SCR） catalysts in electric power plants.[著者文摘]
Key words:
SCR ; catalysis activity ; removal rate of NOx ;thermal stability
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