کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10244665 47698 2005 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Lewis and Brönsted basic active sites on solid catalysts and their role in the synthesis of monoglycerides
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Lewis and Brönsted basic active sites on solid catalysts and their role in the synthesis of monoglycerides
چکیده انگلیسی
Solid Brönsted base catalysts show higher activity and much higher specific rate than reported Lewis basic hydrotalcite catalyst for transesterification of oleic acid methyl ester with glycerol. The selectivity of the former for monoglycerides is higher because of the lower deactivation of the catalyst, which allows the transesterification of diglycerides to occur at longer reaction times. Calcined Li-Al hydrotalcites give higher activity than MgO or Al-Mg hydrotalcites because of the stronger Lewis basicity of the former. All of the solid Lewis basic catalysts have the same selectivity to monoglyceride regardless of the base strength, a selectivity lower than that of Brönsted basic solid catalysts.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Catalysis - Volume 234, Issue 2, 10 September 2005, Pages 340-347
نویسندگان
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