کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
67194 48470 2009 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Partial hydrogenation of sunflower oil: Use of edible modifiers of the cis/trans-selectivity
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Partial hydrogenation of sunflower oil: Use of edible modifiers of the cis/trans-selectivity
چکیده انگلیسی

The partial hydrogenation of sunflower oil with minimum trans-isomer formation is studied, using a Pd/γ-alumina catalyst modified with promoters apt for human consumption: ethyl benzoate and magnesium glycinate. It was found that the hydrogenation rate diminishes with the additions of the modifiers.Regarding the cis/trans-selectivity, significant differences were found: ethyl benzoate promoted the formation of trans-isomers, whereas magnesium glycinate diminished it. The results can be interpreted in terms of different effects: change in the electron density of palladium, which affects the relative adsorption strength of the reactant, intermediates and hydrogen, and a block of part of the surface by the modifiers. Theoretical calculations were performed to support this hypothesis.

Two edible modifiers of the selectivity, magnesium glycinate and ethyl benzoate were used in the partial hydrogenation of sunflower oil on a supported-Pd catalyst. It was found that the hydrogenation rate diminishes with the additions of the modifiers. Regarding the cis/trans-selectivity, ethyl benzoate promoted the formation of trans-isomers, whereas the magnesium glycinate diminished it. Theoretical calculations are used in order to explain the experimental results.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Catalysis A: Chemical - Volume 299, Issues 1–2, 18 February 2009, Pages 88–92
نویسندگان
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