Figshare最新文献

筛选

英文中文

Nitration-PromotednVanadate Catalysts for Low-TemperaturenSelective Catalytic Reduction of NOX withnNH3 nNH3 3</sub&gt；硝化促进的钒酸盐催化剂低温 n选择性催化还原NO&lt；sub>X</sub&gt；

Figshare Pub Date : 2023-09-06 DOI: 10.1021/acsomega.3c05423.s001

Sun-I Kim (1699477), Yeong Jun Choi (16941919), Min Seong Lee (16941922), Duck Hyun Lee (1649053)

{"title":"Nitration-PromotednVanadate Catalysts for Low-TemperaturenSelective Catalytic Reduction of NOX withnNH3","authors":"Sun-I Kim (1699477), Yeong Jun Choi (16941919), Min Seong Lee (16941922), Duck Hyun Lee (1649053)","doi":"10.1021/acsomega.3c05423.s001","DOIUrl":"https://doi.org/10.1021/acsomega.3c05423.s001","url":null,"abstract":"Vanadium-based catalysts have been commercially usednin selectivencatalytic reduction (SCR), owing to their high catalytic activitynand effectiveness across a wide temperature range; however, theirncatalytic efficiency decreases at lower temperatures under exposurento SOX. This decrease is largely due tonammonium sulfate generation on the catalyst surface. To overcome thisnlimitation, we added ammonium nitrate to the V2O5-WO3/TiO2 catalyst, producing a V2O5-WO3/TiO2 catalyst with nitratenfunctional groups. With this approach, we found that it was possiblento adjust the amount of these functional groups by varying the amountnof ammonium nitrate. Overall, the resultant nitrate V2O5-WO3/TiO2 catalyst has large quantitiesnof NO3– and chemisorbed oxygen, whichnimproves the density of Brønsted and Lewis acid sites on thencatalyst surface. Furthermore, the nitrated V2O5-WO3/TiO2 catalyst has a high NOX removal efficiency and N2 selectivitynat low temperatures (i.e., 300 °C); this is because NO3– and chemisorbed oxygen, generated by nitratentreatment, facilitated the occurrence of a fast SCR reaction. Thenapproach outlined in this study can be applied to a wide range ofnSCR catalysts, allowing for the development of more, low-temperaturenSCR catalysts.","PeriodicalId":523748,"journal":{"name":"Figshare","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147921354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0