کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9608066 | 46039 | 2005 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Bimetallic Bi-Pt, Ru-Pt and Ru-Pd and trimetallic catalysts for the selective oxidation of glyoxal into glyoxalic acid in aqueous phase
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Various bi- and trimetallic associations have been tested as catalysts for the selective oxidation of glyoxal into glyoxalic acid in aqueous phase. All catalysts were supported on carbon and consisted of a noble metal (Pd or Pt) in association with a second (or third) metal acting as promoter (Ru or Bi). Out of all the possible combinations, some families of catalysts were selected as interesting candidates and a detailed kinetic study was undertaken, in order to determine the rate constant associated with the formation of glyoxalic acid. In particular, the BiPt/C catalysts gave very high activity, but low selectivity (due to over-oxidation to oxalic acid), the PdRu/C catalysts gave the highest yields in glyoxalic acid, but with long reaction times and a marked sensitivity to the preparation procedure, while the trimetallic catalysts gave high yields in relatively short periods of time.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Catalysis A: General - Volume 282, Issues 1â2, 30 March 2005, Pages 303-313
Journal: Applied Catalysis A: General - Volume 282, Issues 1â2, 30 March 2005, Pages 303-313
نویسندگان
Aurore Deffernez, Sophie Hermans, Michel Devillers,