کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
55337 47048 2012 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Hydrolytic hydrogenation of hemicellulose over metal modified mesoporous catalyst
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Hydrolytic hydrogenation of hemicellulose over metal modified mesoporous catalyst
چکیده انگلیسی

The hydrolytic hydrogenation of hemicellulose arabinogalactan, into sugars, sugar alcohols and furfurals was carried out in a batch reactor using modified mesoporous MCM-48 material incorporated with ruthenium metal into the framework. The bi-functional catalytic materials, MCM-48 and Ru–MCM-48 were synthesized, characterized and investigated in the title reaction at total pressure of 20 bar hydrogen, using an initial arabinogalactan concentration of 0.4 wt%, at 458 K. The transformation of the hemicellulose consists of arabinogalactan hydrolysis to the monosaccharides, l-arabinose and d-galactose followed by the subsequent hydrogenation to sugar alcohols, arabitol and galactitol or dehydration of the monomers to furfural and 5-hydroxymethylfurfural. The yields of the main products, i.e. sugars, sugar alcohols and furfurals were varied depending on the strength of the acid sites and the presence of metal in the structure of the ruthenium modified catalyst. Ru–MCM-48 displayed high catalytic activity and the sugar alcohols were obtained selectively from the hemicellulose. The catalytic performance of the mesoporous MCM-48 catalysts with respect to the catalyst structure, acidity and presence of the metal was evaluated.

Figure optionsDownload high-quality image (86 K)Download as PowerPoint slideHighlights
► Hydrolytic hydrogenation of arabinogalactan was done.
► H–MCM-48 and metal modified mesoporous Ru–MCM-48 were tested.
► A one-pot transformation of hemicellulose over bi-functional catalysts.
► Selective formation of arabitol and galactitol.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Catalysis Today - Volume 196, Issue 1, 30 November 2012, Pages 26–33
نویسندگان
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