简介概要

Promotional effects of copper doping on Ti-Ce-Ox for selective catalytic reduction of NO by NH3 at low temperature

来源期刊:Journal of Rare Earths2016年第3期

论文作者:杨波 沈岳松 曾燕伟 沈树宝 祝社民

文章页码:268 - 275

摘    要:A series of copper-doped Ti-Ce-Ox complex oxide catalysts were synthesized by sol-gel method and evaluated for selective catalytic reduction of NO by NH3 at low temperature. The promotional effect of copper doping on their structure, acidity and catalytic activity were investigated by means of Brumauer-Emmett-Teller(BET), temperature-programmed reduction(H2-TPR), X-ray diffraction(XRD), scanning electron microscopy(SEM), temperature programmed desorption(NH3-TPD) and pyridine adsorption infrared spectrum(Py-IR) technologies. Results showed that the copper additives could improve the low temperature catalytic performance for selective catalytic reduction of Ti-Ce-Ox catalyst and the NO conversion efficiency of Ti-Cu-Ce-Ox catalyst reached above 90% at 150–250 oC(Ti/Cu=4). The introduction of copper could enhance the redox property of the Ti-Ce-Ox complex oxide catalyst, refine the particle size caused by lattice distortion and oxygen vacancy defect and enhance the acid amount of the Lewis acid site. Moreover, Ti-Cu-Ce-Ox complex oxide catalyst also had good anti-sulfur ability and anti-water influence, when injecting 300 ppm SO2 and 10 vol.%H2O, the NO conversion efficiency of Ti-Cu-Ce-Ox catalyst reached 80%.

详情信息展示

Promotional effects of copper doping on Ti-Ce-Ox for selective catalytic reduction of NO by NH3 at low temperature

杨波1,沈岳松1,曾燕伟1,沈树宝2,祝社民1

1. College of Materials Science and Engineering, Nanjing Tech University2. College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University

摘 要:A series of copper-doped Ti-Ce-Ox complex oxide catalysts were synthesized by sol-gel method and evaluated for selective catalytic reduction of NO by NH3 at low temperature. The promotional effect of copper doping on their structure, acidity and catalytic activity were investigated by means of Brumauer-Emmett-Teller(BET), temperature-programmed reduction(H2-TPR), X-ray diffraction(XRD), scanning electron microscopy(SEM), temperature programmed desorption(NH3-TPD) and pyridine adsorption infrared spectrum(Py-IR) technologies. Results showed that the copper additives could improve the low temperature catalytic performance for selective catalytic reduction of Ti-Ce-Ox catalyst and the NO conversion efficiency of Ti-Cu-Ce-Ox catalyst reached above 90% at 150–250 oC(Ti/Cu=4). The introduction of copper could enhance the redox property of the Ti-Ce-Ox complex oxide catalyst, refine the particle size caused by lattice distortion and oxygen vacancy defect and enhance the acid amount of the Lewis acid site. Moreover, Ti-Cu-Ce-Ox complex oxide catalyst also had good anti-sulfur ability and anti-water influence, when injecting 300 ppm SO2 and 10 vol.%H2O, the NO conversion efficiency of Ti-Cu-Ce-Ox catalyst reached 80%.

关键词:

<上一页 1 下一页 >

有色金属在线官网  |   会议  |   在线投稿  |   购买纸书  |   科技图书馆

中南大学出版社 技术支持 版权声明   电话:0731-88830515 88830516   传真:0731-88710482   Email:administrator@cnnmol.com

互联网出版许可证:(署)网出证(京)字第342号   京ICP备17050991号-6      京公网安备11010802042557号