کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
60937 47555 2014 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
New insights into the mechanism of sorbitol transformation over an original bifunctional catalytic system
ترجمه فارسی عنوان
بینش های جدید به مکانیزم تبدیل سوربیتول بر یک سیستم کاتالیستی بیفناک
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
چکیده انگلیسی


• The mixed (Pt/ZrO2 + TiO2–WOx) solid catalyzes sorbitol transformation into liquid alkanes.
• The limiting steps are the isosorbide and mono-oxygenated intermediate transformations.
• CC bond cleavage mainly consists of dehydrogenation–decarbonylation reactions.
• The first reaction from 1,2-hexanediol and 1,2,6-hexanetriol is a CO cleavage by dehydration–hydrogenation.

Sorbitol can be selectively transformed into liquid alkanes over a bifunctional catalytic system Pt/ZrO2 + TiO2–WOx. In this paper, we investigated the reaction mechanism by carefully analyzing the numerous products issued from sorbitol and by studying the reactivity of some identified intermediates (1-hexanol 2-hexanol, 2-hexanone, 2,5-dimethyltetrahydrofuran, 1,2-hexanediol and 1,2,6-hexanetriol). This led us to propose that CC cleavage reactions occur on terminal CC bonds and mainly consist of dehydrogenation–decarbonylation reactions. The limiting steps of the sorbitol transformation are the isosorbide and mono-oxygenated intermediate transformations, especially the hydrogenation of ketones. It is also assessed that diols or triols with n carbon atoms are mainly converted in compounds with n − 1 carbon atoms. Short compounds (1 to 3 carbon atoms) are obtained via a dehydrogenation-retro-aldol reaction pathway and not from isosorbide conversion.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Catalysis - Volume 320, December 2014, Pages 16–25
نویسندگان
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