Improved Low-Temperature Activity of V2O5-WO3/TiO2 for Denitration Using Different Vanadium Precursors
文献类型：期刊论文
| 作者 | Gan, Lina1,2; Guo, Feng1; Yu, Jian1; Xu, Guangwen1 |
| 刊名 | CATALYSTS
 |
| 出版日期 | 2016-02-01 |
| 卷号 | 6期号:2页码:25 |
| 关键词 | vanadium precursor denitration SCR low-temperature acitivity vanadyl acetylacetonate |
| ISSN号 | 2073-4344 |
| 通讯作者 | Yu, J |
| 英文摘要 | This work tested two V2O5-WO3/TiO2 catalysts with different vanadium precursors for selective catalytic reduction (SCR) of flue gas NO using NH3 at 150-450 degrees C. While catalyst A was prepared using ammonium metavanadate (NH4VO3) through incipient impregnation, catalyst B was made according to the solvothermal method using vanadyl acetylacetonate (VO(acac)(2)) as the vanadium precursor. The catalytic evaluation for denitration was in a laboratory fixed bed reactor using simulated flue gas under conditions of a gas hourly space velocity (GHSV) of 40,000 h(-1) and an NH3/NO molar ratio of 0.8. Without SO2 and water vapor in the flue gas at 200 degrees C, the realized NO conversion was 56% for catalyst A but 80% for B. The presence of 350 ppm SO2 and 10 vol. % water vapor in the flue gas slightly reduced the NO conversion over catalyst B, and its activity was stable in a 108-h continuous test at temperatures varying from 450 degrees C to 220 degrees C. Via fourier transformation infrared spectroscopy (FT-IR) and thermogravimetric (TG) analysis, it was shown that over catalyst B a dynamic balance between the formation and decomposition of ammonium sulfite or sulfate is built possibly at temperatures as low as 220 degrees C. For this catalyst there was a higher surface atomic concentration of vanadium and a higher ratio of V4+/(V4+ + V5+), while the NH3 adsorption test revealed more acidic sites on catalyst B. The study discloses a potentially new approach to prepare a V2O5-WO3/TiO2 catalyst with good performance for SCR of flue gas NO at 220-300 degrees C. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Chemistry, Physical |
| 研究领域[WOS] | Chemistry |
| 关键词[WOS] | SELECTIVE CATALYTIC-REDUCTION ; OXIDE CATALYSTS ; SILICA SUPPORT ; MECHANISTIC ASPECTS ; NO ; NH3 ; ADSORPTION ; TITANIA ; AMMONIA ; SCR |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000371898400013 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/20640]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 作者单位 | 1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Gan, Lina,Guo, Feng,Yu, Jian,et al. Improved Low-Temperature Activity of V2O5-WO3/TiO2 for Denitration Using Different Vanadium Precursors[J]. CATALYSTS,2016,6(2):25. |
| APA | Gan, Lina,Guo, Feng,Yu, Jian,&Xu, Guangwen.(2016).Improved Low-Temperature Activity of V2O5-WO3/TiO2 for Denitration Using Different Vanadium Precursors.CATALYSTS,6(2),25. |
| MLA | Gan, Lina,et al."Improved Low-Temperature Activity of V2O5-WO3/TiO2 for Denitration Using Different Vanadium Precursors".CATALYSTS 6.2(2016):25. |
入库方式： OAI收割
来源：过程工程研究所
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