吴里程,王谦,赵炜.NH4F对NH3低温选择性催化还原NO的影响研究[J].分子催化编辑部,2018,32(1):63-69
NH4F对NH3低温选择性催化还原NO的影响研究
The Effect of NH4 F on the Selective Catalytic Reduction of NO by NH3 at Low Temperature
投稿时间:2017-11-13  修订日期:2017-12-20
DOI:
中文关键词:  氟掺杂  低温选择性催化还原  SCR  氧化钒/氧化钛
英文关键词:fluorine doping  low temperature selective catalytic reduction  SCR  vanadium oxide/titanium oxide
基金项目:国家自然科学基金资助(51506077);江苏省自然科学基金(BK20150488);江苏省高校自然科学基金(15KJB610003);江苏大学高级人才基金(15JDG156)
作者单位
吴里程 江苏大学 能源与动力工程学院, 江苏 镇江 212013 
王谦 江苏大学 能源与动力工程学院, 江苏 镇江 212013 
赵炜 江苏大学 能源与动力工程学院, 江苏 镇江 212013 
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中文摘要:
      制备了一种新的氟掺杂氧化钒/氧化钛催化剂,探讨了掺杂模式、制备方法对低温SCR活性的影响.结果显示,在120~240℃反应温度下,由溶胶法制得的氟掺杂于钒(F-V)模式下的催化活性最佳,通过与未掺杂催化剂(COM)对比可知,在210℃时,氟掺杂催化剂的活性提高了35%,并于240℃时NO的脱除率达到了98.6%.通过X射线衍射试验(XRD)、透射电子显微镜(TEM)、比表面积测试(BET)、光电子能谱分析(XPS)以及H2程序升温还原(H2-TPR)等表征技术显示氟掺杂引起催化剂SCR活性提升主要与催化剂活性成分的良好分散性、粒子尺寸减小、比表面积及孔容增大、更强的氧化还原能力有关.另外,通过试验研究表明,氟掺杂催化剂不仅提升了SCR活性,拓宽了活性温度范围,而且还增强了抗硫与抗水性能.
英文摘要:
      A novel fluorine doped vanadium oxide/titanium oxide catalyst was prepared. The effect of F-doping modes and preparation methods were discussed. The results showed that the F-V catalyst obtained by the sol-gel method could perform the best in denitration. By comparing with COM catalyst, the F-V catalyst activity increased by 35% at 210℃, and its conversion reached 98.6% at 240℃. The results of XRD, TEM, BET, XPS, H2-TPR techniques showed that the superior catalytic performance was attributed to the highly dispersed active species, the particle size reduction, the specific surface area increase and the stronger redox capacity. In addition, The modified F-doping catalysts not only owned terrific SCR activities, broad range of active temperature, but also achieved good resistance to SO2 and H2O.
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