全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
热力发电  2015 

scr脱硝催化剂再生技术试验研究

, PP. 34-41

Keywords: scr,脱硝催化剂,再生,清洗,负载,脱硝效率

Full-Text   Cite this paper   Add to My Lib

Abstract:

对选择性催化还原法(scr)脱硝催化剂再生工艺进行研究。用x射线晶体衍射(xrd),x射线荧光光谱(xrf),x射线光电子能谱(xps)和比表面积分析等方法对再生前、后的催化剂进行了表征;采用模拟烟气在自制脱硝反应装置上对催化剂再生效果进行了评价。研究发现:通过鼓泡或超声波辅助的稀h2so4清洗可有效去除催化剂中的有毒物质并恢复比表面积,且鼓泡的综合效果更好;以乙醇胺为助溶剂,可根据所需钒的补充量配制不同浓度的偏钒酸铵水溶液,采用浸渍-干燥-煅烧工艺,可实现活性物质钒氧化物的补充,使催化剂的脱硝效率恢复至92%;用溶解性较好的硝酸铈代替偏钒酸铵,向失活催化剂中添加活性物质氧化铈,可拓宽脱硝反应的温度区间,并将催化剂的脱硝效率最高值提至90%。

References

[1]  张强.燃煤电站scr烟气脱硝技术及工程应用[m].北京:化学工业出版社,2007:15-107.zhangqiang.scrfluegasdenitrationtechnologyanditsapplicationinthermalpowerunits[m].beijing:chemicalindustrypress,2007:15-107(inchinese).
[2]  陈进生.火电厂烟气脱硝技术――选择性催化还原法[m].北京:中国电力出版社,2008:51-54.chenjinsheng.fluegasdenitrationtechnologyinthermalpowerplants:selectivecatalyticreduction[m].beijing:chinaelectricpowerpress,2008:51-54(inchinese).
[3]  朱崇兵,金保升,仲兆平,等.k2o对v2o5-wo3/tio2催化剂的中毒作用[j].东南大学学报(自然科学版),2008,38(1):101-106.zhuchongbing,jinbaosheng,zhongzhaoping,etal.pisoningeffectofk2oonv2o5-wo3/tio2catalysts[j].journalofsoutheastuniversity(naturalscienceedition),2008,38(1):101-106.
[4]  zhengy,jensenad,johnssonje.laboratoryinvestigationofselectivecatalyticreductioncatalysts:deactivationbypotassiumcompoundsandcatalystgeneration[j].industrial&engineeringchemistryresearch,2004,43(4):941-947.
[5]  姜烨,高翔,杜学森,等.钾盐对v2o5/tio2催化剂上nh3选择性催化还原no的影响[j].中国电机工程学报,2008,28(35):21-26.jiangye,gaoxiang,duxuesen,etal.theeffectofpotassiumsaltsonselectivecatalyticreductionofnowithnh3overv2o5/tio2catalysts[j].proceedingsofthecsee,2008,28(35):21-26.
[6]  zhangx,huangz,liuz.effectofkclonselectivecatalyticreductionofnowithnh3overav2o5/accatalyst[j].catalysiscommunications,2008,9(5):842-846.
[7]  bartholomewch.mechanismsofcatalystdeactivation[j].appliedcatalysisa:general,2001,212(1/2):17-60.
[8]  seniorcl,lignelldo,sarofimaf,etal.modelingarsenicpartitioningincoal-firedpowerplants[j].combustionandflame,2006,147(3):209-221.
[9]  沈伯雄,熊丽仙,刘亭.负载型v2o5-wo3/tio2催化剂的砷中毒研究[j].燃料化学学报,2011,39(11):856-859.shenboxiong,xionglixian,liuting.studyonarsenicpoisoningforloadingcatalystofv2o5-wo3/tio2catalysts[j].journaloffuelchemistryandtechnology,2011,39(11):856-859.
[10]  leejb,kimsk,kimwh,etal.effectofh2so4concentrationinwashingsolutiononregenerationofcommercialselectivecatalyticreductioncatalyst[j].koreanjournalofchemicalengineering,2012,29(2):270-276.
[11]  段竞芳,史伟伟,夏启斌,等.失活钒钛基scr催化剂性能表征及其再生[j].功能材料,2012,43(16):2191-2195.duanjingfang,shiweiwei,xiaqibin,etal.characterizationandregenerationofdeactivationcommercialscrcatalyst[j].journaloffunctionalmaterials,2012,43(16):2191-2195.
[12]  商雪松,陈进生,胡恭任,等.商用scr脱硝催化剂k2o中毒后再生:(nh4)2so4溶液[j].功能材料,2012,40(6):2191-2195.shangxuesong,chengjinsheng,hugongren,etal.regenerationofcommercialde-noxscrcatalystpoisonedbyk2owith(nh4)2so4solution[j].journaloffuelchemistryandtechnology,2012,40(6):750-756.
[13]  pengy,lij,shiw,etal.designstrategiesfordevelopmentofscrcatalyst:improvementofalkalipoisoningresistanceandnovelregenerationmethod[j].environmentalscience&technology,2012,46(22):12623-12629.
[14]  商雪松,陈进生,赵金平,等.scr脱硝催化剂失活及其原因研究[j].燃料化学学报,2011,39(6):465-471.shangxuesong,chenjinsheng,zhaojinping,etal.discussiononthedeactivationofscrdenitrificationcatalystanditsreasons[j].journaloffuelchemistryandtechnology,2011,39(6):465-471.
[15]  prichards,kanekos,suyamak,etal.optimizingscrcatalystdesignandperformanceforcoal-firedboilers[c]//epa/epri1995jointsymposiumstationarycombustionnoxcontrol.kansas,usa,1995.
[16]  zhangs,zhongq.promotionaleffectofwo3ono2-overv2o5/tio2catalystforselectivecatalyticreductionofnowithnh3[j].journalofmolecularcatalysisa:chemical,2013,373:108-113.
[17]  chenjp,yangrt.mechanismsofpoisoningofthev2o5/tio2catalystforthereductionofnobynh3[j].journalofcatalysis,1990,125(2):411-420.
[18]  kamatah,takahashik,odenbrandcui.theroleofk2ointheselectivereductionofnowithnh3overav2o5(wo3)/tio2commercialselectivecatalyticreductioncatalyst[j].journalofmolecularcatalysisa:chemical,1999,139(2/3):189-198.
[19]  chenl,lij,gem.thepoisoningeffectofalkalimetalsdopingovernanov2o5-wo3/tio2catalystsonselectivecatalyticreductionofnoxbynh3[j].chemicalengineeringjournal,2011,170(2/3):531-537.
[20]  krchero,elsenerm.chemicaldeactivationofv2o5/wo3-tio2scrcatalystsbyadditivesandimpuritiesfromfuels,lubricationoilsandureasolutioni.catalyticstudies[j].appliedcatalysisb:environmental,2008,77(3/4):215-227.
[21]  nicosiad,czekaji,krchero.chemicaldeactivationofv2o5/wo3-tio2scrcatalystsbyadditivesandimpuritiesfromfuels,lubricationoilsandureasolution:partii.characterizationstudyoftheeffectofalkaliandalkalineearthmetals[j].appliedcatalysisb:environmental,2008,77(3/4):228-236.
[22]  tangf,xub,shih,etal.thepoisoningeffectofna+andca2+ionsdopedonthev2o5/tio2catalystsforselectivecatalyticreductionofnobynh3[j].appliedcatalysisb:environmental,2010,94(1/2):71-76.
[23]  孙克勤,钟秦,于爱华.scr催化剂的砷中毒研究[j].中国环保产业,2008,14(1):40-42.sunkeqin,zhongqin,yuaihua.studyonarsenicpoisoningofscrcatalyst[j].chinaenvironmentalprotectionindustry,2008,14(1):40-42.
[24]  仲兆平,张茜芸,杨碧源,等.v2o5/tio2烟气脱硝催化剂的钾、钠、锌、磷中毒及再生[j].东南大学学报(自然科学版),2013,43(3):548-552.zhongzhaoping,zhangxiyun,yangbiyuan,etal.effectsofpotassium,sodium,zincandphosphorusonfluegasde-noxperformanceoverv2o5/tio2catalysts[j].journalofsoutheastuniversity(naturalscienceedition),2013,43(3):548-552.
[25]  khodayarir,odenbrandcui.regenerationofcommercialscrcatalystsbywashingandsulphation:effectofsulphategroupsontheactivity[j].appliedcatalysis:environmental,2001,33(4):277-291.
[26]  khodayarir,odenbrandcui.regenerationofcommercialtio2-v2o5-wo3scrcatalystsusedinbiofuelplants[j].appliedcatalysis:environmental,2001,30(1/2):87-99.
[27]  沈伯雄,施建伟,杨婷婷,等.选择性催化还原脱氮催化剂的再生及其应用评述[j].化工进展,2008,27(1):64-67.shenboxiong,shijianwei,yangtingting,etal.regenerationtechnologiesofscrcatalystsandtheirapplications[j].chemicalindustryandengineeringprogress,2008,27(1):64-67.
[28]  云端,邓斯理,宋蔷,等.v2o5-wo3/tio2系scr催化剂的钾中毒及再生方法[j].环境科学研究,2009,22(6):730-735.yunduan,dengsili,songqiang,etal.potassiumdeactivationandregenerationmethodofv2o5-wo3/tio2scrcatalyst[j].researchofenvironmentalsciences,2009,22(6):730-735.
[29]  shangx,hug,hec,etal.regenerationoffull-scalecommercialhoneycombmonolithcatalyst(v2o5-wo3/tio2)usedincoal-firedpowerplant[j].journalofindustrialandengineeringchemistry,2012,18(1):513-519.
[30]  chenl,lij,gem.promotionaleffectofce-dopedv2o5-wo3/tio2withlowvanadiumloadingsforselectivecatalyticreductionofnoxbynh3[j].thejournalofphysiscschemistryc,2009,113(50):21177-21184.
[31]  salehry,wachsie,chanss,etal.theinteractionofv2o5withtio2(anatase):catalystevolutionwithcalcinationtemperatureando-xyleneoxidation[j].journalofcatalysis,1986,98(1):102-114.
[32]  buscag,liettil,ramisg,etal.chemicalandmechanismsaspectsoftheselectivecatalyticreductionofnoxbyammoniaoveroxidecatalysts:areview[j].appliedcatalysisa:general,1998,18(1-2):1-36.
[33]  李云涛,毛宇杰,钟秦,等.scr催化剂的组成对其脱硝性能的影响[j].燃料化学学报,2009,37(5):601-606.liyuntao,maoyujie,zhongqin,etal.effectsofcompositionsofscrcatalystondenoxperformance[j].journaloffuelchemistryandtechnology,2009,37(5):601-606.
[34]  forzattip.presentstatusandperspectivesinde-noxscrcatalysis[j].appliedcatalysisb:general,2001,222(1/2):221-236.
[35]  kamatah,takahashik,odenbrandcui.kineticsoftheselectivereductionofnowithnh3overav2o5(wo3)/tio2commercialscrcatalyst[j].journalofcatalysis,1999,185(1):106-113.
[36]  inomatam,miyamotoa,murakamiy.mechanismsofthereactionofnoandnh3onvanadiumoxidecatalystinthepresenceofoxygenunderthedilutegascondition[j].journalofcatalysis,1980,62(1):140-148.
[37]  tangf,zhuangk,yangf,etal.effectofdispersionstateandsurfacepropertiesofsupportedvanadiaontheactivityofv2o5/tio2catalystfortheselectivecatalyticreductionofnobynh3[j].chinesejournalofcatalysis,2012,33(6):933-940.
[38]  gaoy,thevuthasans,mccreadyde,etal.mocvdgrowthandstructureofnb-andv-dopedtio2filmsonsapphire[j].journalofcrystalgrowth,2000,212(1):178-190.
[39]  陈建军,李俊华,柯锐,等.钒和钨负载量对v2o5-wo3/tio2表面形态及催化性能的影响[j].环境科学,2007,28(9):1949-1953.chenjianjun,lijunhua,kerui,etal.effectofvanadiumandtungstenloadingsonthesurfacecharacteristicsandcatalyticactivitiesofv2o5-wo3/tio2catalysts[j].environmentalscience,2007,28(9):1949-1953.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133