{"title":"Combinations of platinum and palladium on alumina supports as oxidation catalysts","authors":"M. Skoglundh, L.O. Löwendahl, J.-E. Otterated *","doi":"10.1016/0166-9834(91)80019-S","DOIUrl":null,"url":null,"abstract":"<div><p>The effects of the total content of Pd + Pt, the mol-% ratio of Pd to Pt, hydrothermal treatment of the catalyst wash-coat, and the oxygen concentration on the light-off temperature,<em>T</em><sub>50</sub>, for the complete oxidation of xylene isomers, propene, and carbon monoxide were studied. The alumina wash-coats were thermally treated at 500 °C for 2 h in air or after the thermal treatment, hydrothermally treated at 814 °C for 2 h in 100-% steam. The catalysts were impregnated with 5, 10, and 20 μmol of Pd + Pt per gram of catalyst. The mol-% ratio of Pd to Pt was varied in the range from 0:100 to 100:0. The light-off temperatures had a minimum at a Pd : Pt mol-% ratio of 80:20, and decreased with increasing total metals concentration, increasing oxygen concentration and hydrothermal treatment of the alumina wash-coat.</p></div>","PeriodicalId":8091,"journal":{"name":"Applied Catalysis","volume":"77 1","pages":"Pages 9-20"},"PeriodicalIF":0.0000,"publicationDate":"1991-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0166-9834(91)80019-S","citationCount":"55","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Catalysis","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/016698349180019S","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 55
Abstract
The effects of the total content of Pd + Pt, the mol-% ratio of Pd to Pt, hydrothermal treatment of the catalyst wash-coat, and the oxygen concentration on the light-off temperature,T50, for the complete oxidation of xylene isomers, propene, and carbon monoxide were studied. The alumina wash-coats were thermally treated at 500 °C for 2 h in air or after the thermal treatment, hydrothermally treated at 814 °C for 2 h in 100-% steam. The catalysts were impregnated with 5, 10, and 20 μmol of Pd + Pt per gram of catalyst. The mol-% ratio of Pd to Pt was varied in the range from 0:100 to 100:0. The light-off temperatures had a minimum at a Pd : Pt mol-% ratio of 80:20, and decreased with increasing total metals concentration, increasing oxygen concentration and hydrothermal treatment of the alumina wash-coat.
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