摘要
分别制备V-Mo/Ti和V-W/Ti脱硝催化剂,并对两种催化剂进行650℃热处理。采用XRD、N_(2)吸附-脱附、H_(2)-TPR、UV-vis、NH_(3)-TPD和O_(2)-TPD表征分析各催化剂的物理化学性能,并考察催化剂热处理前后脱硝性能的变化。结果显示,650℃热处理没有改变钒钛基催化剂的晶型,但会导致催化剂比表面积和孔容下降。热处理后,催化剂的还原性能、酸性、化学吸附氧含量均有不同程度的下降,造成催化剂脱硝活性降低。相比V-Mo/Ti催化剂,V-W/Ti催化剂受热处理的影响相对较低。因此,V-W/Ti-T催化剂的脱硝性能优于V-Mo/Ti-T催化剂,即V-W/Ti催化剂的热稳定性强于V-Mo/Ti催化剂。
V-Mo/Ti and V-W/Ti De-NOx catalysts were prepared and treated at 650℃subsequently.XRD,N_(2) adsorption-desorption,H_(2)-TPR,UV-vis,NH_(3)-TPD,and O_(2)-TPD analyses were carried out to investigated the change in the physiochemical properties of the different catalysts.De-NOx performances of catalysts before and after heat treatment were studied.It was found that the thermal treatment at 650℃did not change the crystal structure of the vanadium-titanium based catalysts,but could lead to the decrease of their BET surface area and pore volume.Besides,the thermal treatment resulted in the decline of reducibility,acidity,and chemical adsorbed oxygen of the catalysts,which led to the decrease of the catalytic performance of the catalysts.V-Mo/Ti catalyst was more affected by thermal treatment than V-W/Ti catalyst.As a result,V-W/Ti-T catalyst exhibited better catalytic performance than that of the V-Mo/Ti-T catalyst.In other words,V-W/Ti catalyst possessed stronger thermal stability than that of the V-Mo/Ti catalyst.
作者
黄力
岳彦伟
纵宇浩
李金珂
高义博
王虎
韩沛
Huang Li;Yue Yanwei;Zong Yuhao;Li Jinke;Gao Yibo;Wang Hu;Han Pei(Datang Nanjing Environmental Protection Technology Co.,Ltd.,Nanjin 211111,Jiangsu,China;Instrumental Analysis Center,Inner Mongolia University of Science&Technology,Baotou 014010,Inner Mongolia,China)
出处
《工业催化》
CAS
2022年第10期41-46,共6页
Industrial Catalysis
基金
江苏省自然科学基金(BK20210001)
