Enhancement effect of RuO2 doping on the reduction process of NOx by NH3 via V2O5-WO3/TiO2 particle catalyst under low-temperature: Structure-activity relationship and reaction mechanism

被引:12
作者
Ren, Zhixiang [1 ,2 ]
Li, Ao [1 ]
Lei, Xinyu [1 ]
Yu, Zhengwei [1 ,4 ]
Wang, Guangying [3 ]
Zhang, Hongliang [1 ,4 ]
Chen, Huan [4 ]
Wang, Yin [1 ]
Long, Hongming [1 ,4 ]
机构
[1] Anhui Univ Technol, Sch Met Engn, Maanshan 243002, Peoples R China
[2] Cent South Univ, Sch Minerals Proc & Bioengn, Changsha 410083, Peoples R China
[3] Anhui Yuanchen Environm Protect Technol Co Ltd, Hefei 230011, Peoples R China
[4] Anhui Univ Technol, Key Lab Met Emiss Reduct & Resources Recycling, Minist Educ, Maanshan 243002, Peoples R China
基金
中国国家自然科学基金;
关键词
Denitrification; TiO2; Ru; NH3-SCR; NO; PHYSICOCHEMICAL PROPERTIES; SB-V2O5/TIO2; CATALYSTS; POISONING RESISTANCE; SELECTIVE REDUCTION; PERFORMANCE; NH3-SCR; SCR; V2O5/WO3-TIO2; CERIA; TECHNOLOGY;
D O I
10.1016/j.apsusc.2023.157160
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
As a mainstream moderate-high temperature (250-420 degrees C) particulate denitrification catalyst, V2O5-WO3/TiO2 (VWT) is not applicable to low-temperature (60-150 degrees C) iron ore sintering flue gas after semi dry/wet desul-furization. In order to improve the NH3-deNOx performance of the VWT particle catalyst at low temperatures, a series of powder VWT denitrification catalysts doped with different content of RuO2 (R-VWT) prepared by the wet co-impregnation method were researched, and found that the particulate catalyst service temperature (about 100 % NO conversion) is lowered from 225 degrees C (VWT) to below 175 degrees C by doping 0.5 % RuO2. In addition, a series of characterizations indicate that the doped RuO2 enhances the redox performance of R-VWT and promotes the generation of more surface active intermediate monodentate nitrate, and accelerates the low-temperature surface SCR transient reaction rate.
引用
收藏
页数:11
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