壳聚糖/Ti-W-V-Mn基金属氧化物复合脱硝催化剂的制备及性能研究  

Synthesis and catalytic activity of CS/Ti-W-V-Mn oxide for ammonia-free SCR of NO

作　　者：王新翠 刘瑾 李真 王凯 张定仑 Wang Xincui;Liu Jin;Li Zhen;Wang Kai;Zhang Dinglun(School of Materials Science and Chemical Engineering,Anhui Jianzhu University,Hefei 230022;Anhui Key Laboratory of Advanced Building Materials,Anhui Jianzhu University,Hefei 230022)

机构地区：[1]安徽建筑大学材料与化学工程学院,合肥230022 [2]安徽省先进建筑材料重点实验室,合肥230022

出　　处：《化工新型材料》2020年第7期215-220,共6页New Chemical Materials

基　　金：安徽省科技攻关项目(1604a0802113);国家自然科学基金项目(21171004);安徽省重点技术研究开发项目(1704a0802134)。

摘　　要：利用壳聚糖(CS)与Ti-W-V-Mn基金属氧化物复合制备新型选择性催化还原(SCR)催化剂CS/Ti-W-V-Mn,应用于NO的无氨辅助脱硝催化。采用SEM、FT-IR、XRD、BET及催化活性评价对催化剂的结构与性能进行表征。结果表明,CS/Ti-W-V-Mn复合脱硝催化剂不仅在低温区(180~250℃)具有良好的无氨催化脱硝性能,在高温区(350~400℃)仍具有较高的无氨脱硝活性。其中,当CS与Ti-W-V-Mn金基属氧化物的投料比(质量比)为1∶1时,催化性能最优,NO的转化率可在宽温度范围(180~400℃)内始终保持100%。该催化剂在低温无氨重复脱硝测试中仍具有较高的催化活性,可重复性较好。A novel ammonia-free denitrification catalyst was prepared by combining chitosan(CS)with Ti-W-VMn metal oxides.The structures and properties were characterized by scanning electron microscope(SEM),fourier transform infrared spectroscopy(FT-IR),X-ray diffraction(XRD)and microporous analyzer.And the catalytic denitrification activities of catalysts were collected by gas analyzer.The results indicated that the CS/Ti-W-V-Mn composite catalysts not only showed good catalytic activity at low temperature(180~250℃),but also performed well at high temperature(350~400℃).Especially,the NO conversion could up to 100%within 180~400℃when the weight ratio between CS and Mn-V-W-Ti oxides was 1∶1 and it’s repeatability of activity testing at low temperature without ammonia was good.

关 键 词：壳聚糖 Ti-W-V-Mn基金属氧化物 无氨选择性催化还原 催化脱硝 

分 类 号：X701.7[环境科学与工程—环境工程]