کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
56244 47078 2010 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Production of acrolein and acrylic acid through dehydration and oxydehydration of glycerol with mixed oxide catalysts
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Production of acrolein and acrylic acid through dehydration and oxydehydration of glycerol with mixed oxide catalysts
چکیده انگلیسی

Dehydration of glycerol solution and further oxidation have been investigated with different mixed oxide catalysts. Among them, iron phosphates were found to be highly active and selective toward acrolein. Glycerol conversion was nearly complete and acrolein yields reach 80–90% after 5 h of test. Fresh and used catalysts were also characterized by different techniques (XRD, SEM, BET and TGA-DSC). Pure and well-defined structures were found more stable than relatively poor crystalline phase. Distribution of products changes during the deactivation of the catalyst, leading to by-products such as acetol, propanal and coke deposit on the surface of the catalyst, indicating a modification of the mechanism.Introducing some oxygen in the feed allowed decreasing the amount of those by-products, but oxidation products appeared such as acetic acid or COx on detriment of the yield in acrolein. Using appropriate mixed oxide catalysts such as molybdenum/tungsten vanadium based catalysts showed interesting performances to obtain acrylic acid directly from glycerol.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Catalysis Today - Volume 157, Issues 1–4, 17 November 2010, Pages 351–358
نویسندگان
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