کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
62029 47617 2010 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Towards understanding the bifunctional hydrodeoxygenation and aqueous phase reforming of glycerol
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Towards understanding the bifunctional hydrodeoxygenation and aqueous phase reforming of glycerol
چکیده انگلیسی

Kinetically coupled reactions of glycerol in water over bifunctional Pt/Al2O3 catalysts are explored as a function of the Pt particle size and the reaction conditions. Detailed analysis of the reaction network shows that “reforming” and hydrodeoxygenation require the presence of a bifunctional catalyst, i.e., the presence of an acid–base and a metal function. The initial reaction steps are identified to be dehydrogenation and dehydration. The dehydrogenation of hydroxyl groups at primary carbon atoms is followed by decarbonylation and subsequent water gas shift or by disproportionation to the acid (and the alcohol) followed by decarboxylation. Hydrogenolysis of the C–O and C–C bonds in the alcohols does not occur under the present reaction conditions. Larger Pt particles favor hydrodeoxygenation over complete deconstruction to hydrogen and CO2.

Glycerol is catalytically converted in aqueous phase over Pt/Al2O3 via bifunctional pathways involving dehydrogenation, dehydration and decarboxylation/decarbonylation. CC and CO bond hydrogenolysis does not occur.Figure optionsDownload high-quality image (37 K)Download as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Catalysis - Volume 269, Issue 2, 5 February 2010, Pages 411–420
نویسندگان
, , , , , ,