کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
39283 45816 2015 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Simultaneous esterification and transesterification for biodiesel synthesis by a catalyst consisting of sulfonated single-walled carbon nanohorn dispersed with Fe/Fe2O3 nanoparticles
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Simultaneous esterification and transesterification for biodiesel synthesis by a catalyst consisting of sulfonated single-walled carbon nanohorn dispersed with Fe/Fe2O3 nanoparticles
چکیده انگلیسی


• SO3H-Fe/Fe2O3-SWCNH can catalyze simultaneous esterification and transesterification.
• This study showed the selectivity of acid site in SWCNH porous.
• The yield of methyl butyrate can be enhanced by increasing the palmitic acid content.

The simultaneous esterification of palmitic acid and transesterification of tributyrin is investigated using a solid acid catalyst newly developed. This catalyst consists of porous single-walled carbon nanohorn (SWCNH) dispersed with Fe/Fe2O3-mixed nanoparticles. The esterfication of palmitic acid is initially catalyzed by this catalyst, and the transesterification of tributyrin can be observed after most of palmitic acid was consumed. Contrary to a general expectation that the addition of a free fatty acid usually has poisonous effect on transesterification of tributyrin, the addition of palmitic acid shows an effect to enhance the yield of methyl butyrate. As one of the reasons, the palmitic acid adsorbed on Fe/Fe2O3 particles placed in the pores of the catalyst may attract tributyrin molecules, and tributyrin concentrated thereon may diffuse to the acidic sites on the catalyst. However, this effect seems to be reduced significantly when the reaction temperature is high.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Catalysis A: General - Volume 497, May 2015, Pages 145–152
نویسندگان
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