Study of the V2O5-WO3/TiO2 Catalyst Synthesized from Waste Catalyst on Selective Catalytic Reduction of NOx by NH3

被引：69
|
作者：
Qi, Chunping [1 ,2 ,3 ]
Bao, Weijun [1 ]
Wang, Liguo [1 ]
Li, Huiquan [1 ,2 ,3 ]
Wu, Wenfen [1 ,2 ]
机构：
[1] Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100090, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[3] Univ Chinese Acad Sci, Sinodanish Ctr Educ & Res, Beijing 100049, Peoples R China
来源：
CATALYSTS | 2017年 / 7卷 / 04期
基金：
中国国家自然科学基金;
关键词：
V2O5-WO3/TiO2; catalyst; leaching; oxalic acid; deNO(x) activity; VANADIA-TITANIA CATALYSTS; V2O5/WO3-TIO2 SCR CATALYSTS; NITRIC-OXIDE; REGENERATION; DEACTIVATION; POTASSIUM; MECHANISM; AMMONIA; SO2; PERFORMANCE;
D O I：
10.3390/catal7040110
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：
V2O5-WO3/TiO2 catalysts were synthesized from waste selective catalytic reduction (SCR) catalyst through oxalic acid leaching and impregnating with various V2O5 mass loadings. The denitration (deNO(x)) activity and physiochemical properties of the catalysts were investigated. All the catalysts were characterized by N-2 adsorption/desorption, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and H-2-temperature programmed reduction. The evaluation result revealed that the deNOx activity of newly synthesized catalyst with 1.0% V2O5 was almost recovered to the level of fresh catalyst, with NO conversion being recovered to 91% at 300 C-omicron, and it also showed a good resistance to SO2 and H2O. The characterization results showed that the decrease of impurities, partial recovery of the V4+/V5+ ratio, and increased reducibility were mainly responsible for the recovery of catalytic activity.
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页数：13
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