不同溶剂再生活性液植入失活蜂窝脱硝催化剂的性能研究
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摘要
某电厂失活蜂窝脱硝催化剂为研究对象。预清洗处理后,以偏钒酸铵为活性前驱体,硫酸、一乙醇胺和草酸作为溶剂,采用鼓泡浸渍植入法制得再生催化剂。通过XRD、BET等表征手段对再生前后催化剂样品进行表征。结果显示,V_2O_5、WO_3活性成分仍以高分散的形态分布在钛白粉载体表面上。反应溶剂对再生前后催化剂晶型无影响,以一乙醇胺作为溶剂时制的样品晶粒更小。各个样品的比表面积、孔容和活性都有所增加,以草酸作为溶剂时催化剂增加最多。
The deactivation of a honeycomb denitration catalyst in a power plant was studied. After the preclening, the ammonium vanadate as the active precursor, sulfuric acid, ethanolamine and oxalic acid as solvent. the regenerated catalyst was prepared by bubbling impregnation The samples were characterized by XRD, BET and other characterization methods. The results showed that the active components of V_2O_5 and WO_3 were still high dispersed on the surface of titanium dioxide carrier. The reaction solvent has no effect on the crystal shape of the catalyst before and after regeneration, and the sample crystal particle is smaller when the ethanolamine is used as the solvent. The sample surface area、pore volume and catalytic activity were increased, When oxalic acid was used as solvent, the catalyst increased most.
The deactivation of a honeycomb denitration catalyst in a power plant was studied. After the preclening, the ammonium vanadate as the active precursor, sulfuric acid, ethanolamine and oxalic acid as solvent. the regenerated catalyst was prepared by bubbling impregnation The samples were characterized by XRD, BET and other characterization methods. The results showed that the active components of V_2O_5 and WO_3 were still high dispersed on the surface of titanium dioxide carrier. The reaction solvent has no effect on the crystal shape of the catalyst before and after regeneration, and the sample crystal particle is smaller when the ethanolamine is used as the solvent. The sample surface area、pore volume and catalytic activity were increased, When oxalic acid was used as solvent, the catalyst increased most.
引文
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[14]沈伯雄,熊丽仙,刘亭,等.纳米负载型V2O5-WO3/TiO2催化剂碱中毒及再生研究[J].燃料化学学报,2010,38(1):85-90.
[15]刘红辉,刘伟,黄锐,等.燃煤电厂SCR脱硝催化剂失活及其再生性能研究[J].中国电力,2014,47(4):139-143.
[16]张发捷,张强,程广文,等.SCR脱硝催化剂再生技术试验研究[J].热力发电,2015(3):34-41.
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[2]段传和,夏怀详.燃煤电站SCR烟气脱硝工程技术[M].北京:中国电力出版社,2009.
[3]张涛,肖雨亭,白伟,等.失活脱硝催化剂再生和回收研究进展[J].电力科技与环保,2015,31(5):20-22.
[4]侯健,朱林,王康,等.烟气脱硝催化剂再生技术及其应用[J].电力科技与环保,2017,33(5):6-8.
[5]何伟,刘友镇,沈鸿亚,等.SCR脱硝催化剂的清灰处理车间[P].CN201620903693.X,2017.
[6]肖雨亭,赵建新,汪德志,等.废旧脱硝催化剂再生清洗研究[J].电力科技与环保,2013,29(4):44-46.
[7]吴凡,段竞芳,夏启斌.SCR脱硝失活催化剂的清洗再生技术[J].热力发电,2012(5):95-98.
[8]张涛,白伟,肖雨亭,等.不同型式失活脱硝催化剂的再生研究[J].中国电力,2015,48(10):144-147.
[9]崔力文,宋浩,吴卫红,等.电站失活SCR催化剂再生试验研究[J].能源工程,2012(3):43-54.
[10]盘思伟,程华,韦正乐,等.钒钛基SCR催化剂K中毒酸洗再生研究[J].热力发电,2014(7):104-109.
[11]Yanke Yu,Chi He,Jinsheng Chen,et.al.Regeneration of deactivated commercial SCR catalyst by alkali washing[J].Catalysis Communications,2013,39(5):78-81.
[12]Raziyeh Khodayari,C U.Ingemar Odenbrand.Regeneration of commercial SCR catalysts by washing and sulphation:effect of sulphate groups on the acrivity[J].applied catalysis B:Environmental,2001,33(4):277-291.
[13]杨建辉,路光杰.一种选择性植入活性成分的废弃脱硝催化剂的再生方法[P].CN201610031071.7,2016.
[14]沈伯雄,熊丽仙,刘亭,等.纳米负载型V2O5-WO3/TiO2催化剂碱中毒及再生研究[J].燃料化学学报,2010,38(1):85-90.
[15]刘红辉,刘伟,黄锐,等.燃煤电厂SCR脱硝催化剂失活及其再生性能研究[J].中国电力,2014,47(4):139-143.
[16]张发捷,张强,程广文,等.SCR脱硝催化剂再生技术试验研究[J].热力发电,2015(3):34-41.
[17]Khodayari R,Odenbrand C U I.Regeneration of commercial TiO2-V2O5-WO3SCR catalysts used in boil fuel plants[J] .AppliedCatalysis B:Environmental,2001,30(1-2):87-99.
[18]吴凡,严纯华.一种SCR脱硝催化剂再生液[P].CN200910031206.X,2009.