摘要
采用共混热解法制备了不同Sn质量分数的V-Mo-Sn/Ti催化剂,通过XRD、N2-吸附脱附和H2-TPR等手段对催化剂进行表征,并在模拟选择性催化还原(SCR)烟气固定床中考察了不同催化剂的脱硝性能及单质汞(Hg^(0))氧化性能。结果表明,Sn的引入降低了V-Mo/Ti催化剂的比表面积和孔容,但没有改变其晶型。相比V-Mo/Ti催化剂,V-Mo-Sn/Ti催化剂具有较高的还原性能、酸性能、脱硝活性、汞氧化效率以及较多的化学吸附氧含量。此外,HCl具有促进Hg^(0)氧化的作用,含Sn催化剂提升了低HCl状态下的Hg^(0)氧化性能。
V-Mo-Sn/Ti catalysts with different contents of Sn are prepared through blending thermal decomposition method. XRD,N2-adsorption and H2-TPR are employed to characterize the catalysts. The performances of the catalysts in denitrification and oxidation activity of elemental mercury( Hg^(0)) are investigated in a simulated selective catalytic reduction( SCR) flue gas fixed bed. Results show that the addition of tin causes V-Mo/Ti catalysts to have lower BET surface area and pore volume,but has little impact on their crystal structure. Compared with V-Mo/Ti catalyst,V-Mo-Sn/Ti catalysts present higher reducibility,acidity,denitrification activity and mercury oxidation efficiency,and more amount of chemical adsorbed oxygen. In addition,HCl can promote the oxidation of mercury,and Sn-containing catalyst can improve the oxidation performance to mercury in low HCl state.
作者
纵宇浩
常峥峰
黄力
王虎
刘洋
李金珂
张东平
ZONG Yu-hao;CHANG Zheng-feng;HUANG Li;WANG Hu;LIU Yang;LI Jin-ke;ZHANG Dong-ping(Datang Nanjing Environmental Protection Technology Co.,Ltd.,Nanjing 211111,China;Nanjing Institute of Technology,Nanjing 211167,China)
出处
《现代化工》
CAS
CSCD
北大核心
2021年第8期159-164,共6页
Modern Chemical Industry
基金
江苏省科技成果转化专项资金项目(BA2017095)
江苏省博士后科研资助计划(2018K076C)
中国博士后科学基金(2019M651632)。
