|
OALib Journal期刊
ISSN: 2333-9721
费用：99美元
|
|
|
|
cu交换量对cu-sapo-34催化剂上nh3选择性催化还原nox反应的影响
, PP. 743-750
Keywords: cu-sapo-34,氨选择性催化还原,铜交换量,酸性位,水热稳定性
Abstract:
？选用不同种类的铵盐和调变cu2+离子交换时间制备不同铜交换量的cu-sapo-34催化剂。并考察了铜交换量对催化剂在氨选择性催化还原（nh3-scr）nox反应中的催化性能和高温水热稳定性的影响。结果表明，cu2+是cu-sapo-34催化剂在nh3-scr反应中的主要活性中心，随着cu交换量的增加催化剂的低温scr活性先升高后降低。铜交换量为2.37%时，cu-sapo-34催化剂的低温活性最好，nox转化率在185℃时即可达到80.0%，且最高达98.7%。icp、h2-tpr、ft-ir和nh3-tpd等表征结果显示，cu引入不但产生了新的氨吸附位点，增加了lewis酸量，而且略微降低了sapo-34上氨的吸附强度。继续增加cu交换量反而导致催化剂的scr活性下降，这是由于大量的cu2+取代了桥式羟基si-oh-al中的h，抑制了scr反应中nh3在催化剂表面的吸附、储存与迁移。此外，较高cu交换量也不利于改善cu-sapo-34的高温水热稳定性。
| [1] | 司知蠢,翁端,吴晓东,栗国,李佳.中国温室气体减排与选择性催化还原脱硝材料[j].科技导报,2009,27(5):87-95.(sizhi-chun,wengduan,wuxiao-dong,liguo,lijia.greenhousegasemissionreductionandmaterialsforselectivecatalyticreductionofnoxinchina[j].sience&technologyreview,2009,27(5):81-95.)
|
| [2] | fickeldw,d'addioe,lauterbachja,loborf.theammoniaselectivecatalyticreductionactivityofcopper-exchangedsmall-porezeolites[j].applcatalb:environ,2011,102(3):441-448.
|
| [3] | wangj,yut,wangx,qig,xuej,shenm,liw.theinfluenceofsilicononthecatalyticpropertiesofcu/sapo-34fornoxreductionbyammonia-scr[j].applcatalb:environ,2012,127:137-147.
|
| [4] | wangl,liw,qig,wengd.locationandnatureofcuspeciesincu/sapo-34forselectivecatalyticreductionofnowithnh3[j].jcatal,2012,289:21-29.
|
| [5] | xuej,wangx,qig,wangj,shenm,liw.characterizationofcopperspeciesovercu/sapo-34inselectivecatalyticreductionofnoxwithammonia:relationshipsbetweenactivecusitesandde-noxperformanceatlowtemperature[j].jcatal,2013,297:56-64.
|
| [6] | dekau,lezcano-gonzalezi,warrendersj,piconeal,wrightpa,weckhuysenbm,bealeam.changingactivesitesincu-chacatalysts:denoxselectivityasafunctionofthepreparationmethod[j].micropormesopormater,2013,166:144-152.
|
| [7] | vennestrmpnr,katerinopouloua,tiruvalamrr,kustova,mosespg,concepcionp,cormaa.migrationofcuionsinsapo-34anditsimpactonselectivecatalyticreductionofnoxwithnh3[j].acscatal,2013,3(9):2158-2161.
|
| [8] | wangl,gaudetjr,liw,wengd.migrationofcuspeciesincu/sapo-34duringhydrothermalaging[j].jcatal,2013,306:68-77.
|
| [9] | wangd,zhangl,kamasamudramk,eplingws.insitu-driftsstudyofrelectivecatalyticreductionofnoxbynh3overcu-exchangedsapo-34[j].acscatal,2013,3(5):871-881.
|
| [10] | 刘中民,蔡光宇,何长青,杨立新,王作周,罗静慎,常彦君,石仁敏,姜增全,孙承林.一种以三乙胺为模板剂的合成硅磷铝分子筛及其制备:中国,1088483a[p].1994-06-29.(liuzhong-min,caiguang-yu,hechang-qing,yangli-xin,wangzuo-zhou,luojing-shen,changyan-jun,shiren-min,jiangzeng-quan,suncheng-lin.thesynthesisofsilicon-aluminumphosphatemolecularsievewithtriethylamineasthetemplateanditspreparation:cn,1088483a[p].1994-06-29.)
|
| [11] | 于铁.si/p/al比例对cu/sapo-34催化剂scr性能的影响[d].天津:天津大学,2012.(yutie.theeffectofsi/p/alratiostothescractivityovercu/sapo-34catalysts[d].tianjin:tianjinuniversity,2012.)
|
| [12] | gaof,waltered,karpem,luoj,tonkynrg,kwakjh,szanyij,pedenchf.structure-activityrelationshipsinnh3-scrovercu-ssz-13asprobedbyreactionkineticsandeprstudies[j].jcatal,2013,300:20-29.
|
| [13] | 徐如人,庞文琴,屠昆岗.沸石分子筛的结构与合成[m].长春:吉林大学出版社,1987.(xuru-ren,pangwen-qin,tukun-gang.zeolitemolecularsievesstructureandsynthesis[m].changchun:jilinuniversitypress,1987.)
|
| [14] | 何长青,刘中民,蔡光宇,辛勤,应品良.sapo-34分子筛表面酸性质的研究[j].分子催化,1996,10(1):48-54.(hechang-qing,liuzhong-min,caiguang-yu,xinqin,yingpin-liang.investigationonthesurfaceacidityofsapo-34molecularsieve[j].journalofmolecularcatalysis(china),1996,10(1):48-54.)
|
| [15] | zamadicsm,chenx,kevanl.studyofcu(ⅱ)locationandadsorbateinteractionincuh-sapo-34molecularsievebyelectronsp4resonameandetectronspinechomodulathspectroscopies[j].jphyschem,1992,96(6):2652-2657.
|
| [16] | zamadicsm,chenx,kevanl.solid-stateionexchangeinh-sapo-34:electronspinresonanceandelectronspinechomodulationstudiesofcu(ⅱ)locationandadsorbateinteraction[j].jphyschem,1992,96(13):5488-5491.
|
| [17] | schwidderm,kumarms,bentrupu,pérez-ram?írezj,brücknera,grünertw.theroleofbrnstedacidityinthescrofnooverfe-mficatalysts[j].micropormesopormater,2008,111(1):124-133.
|
| [18] | mal,chengy,cavataiog,mccaberw,ful,lij.characterizationofcommercialcu-ssz-13andcu-sapo-34catalystswithhydrothermaltreatmentfornh3-scrofnoxindieselexhaust[j].chemengj,2013,225:323-330.
|
| [19] | andersenpj,bailieje,cascijl,chenh-y,fedeykojm,foorks,rajaramrr.transitionmental/zeolitescrcatalysts:wo,2008/132452a2[p].2008-11-06.
|
| [20] | bulli,xuewm,burkp,boorsers,jaglowskiwm,koermergs,moinia,patchettja,dettlingjc,caudlemt.copperchazeolitecatalysts:us,7601662b2.2009-10-13.
|
| [21] | bulli,koermergs,moinia,unverrichts.catalysts,systemsandmethodsutilizingnon-zeolitemetal-containingmolecularsieveshavingthechacrystalstructure:wo,2009099937a1.2009-08-13.
|
Full-Text
|
|
Contact Us
service@oalib.com QQ:3279437679 
WhatsApp +8615387084133
|
|
