کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
43249 45959 2008 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Use of anhydrous sodium molybdate as an efficient heterogeneous catalyst for soybean oil methanolysis
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Use of anhydrous sodium molybdate as an efficient heterogeneous catalyst for soybean oil methanolysis
چکیده انگلیسی

Sodium molybdate (Na2MoO4) has been synthesized and investigated as a heterogeneous catalyst for the methanolysis of different types of renewable lipid sources derived from the soybean oil. Transesterification reactions occurred under relatively mild conditions, requiring low temperatures, short times and normal pressure. The methyl esters synthesized were characterized by reverse-phase and size-exclusion chromatography and hydrogen-nuclear magnetic resonance spectroscopy. The catalyst was characterized by X-ray diffraction, thermogravimetric analysis, and Fourier transform infrared spectroscopy (FTIR). It is very efficient for the transesterification reaction of triglycerides with methanol, with yields higher than 95% of methyl esters. The molybdenum(VI)-complex has a high Lewis acidity and most certainly act on alcohol O–H bond leading to a transient species which has high nucleophilic character. The catalyst was easily recovered and after being washed showed capacity of recyclability for another catalytic reaction with similar activity.

Sodium molybdate was investigated as heterogeneous catalyst for the methanolysis of soybean oil under relatively mild conditions. Methyl esters synthesized were characterized by reverse-phase and size-exclusion chromatography and hydrogen-nuclear magnetic resonance spectroscopy. The catalyst was very active for transesterification reaching yields higher than 95% of methyl esters. The catalyst was easily recovered and showed capacity of recyclability with similar activity.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Catalysis A: General - Volume 351, Issue 2, 30 December 2008, Pages 267–274
نویسندگان
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