Produção de biodiesel via transesterificação etílica com zeólitas básicas

Química Nova

Grace F. Ghesti²  Julio L. De Macedo¹  José A. Dias¹  Sílvia C. L. Dias¹ 

[1] ,Universidade de Brasília Faculdade UnB-Gama Brasília DF ,Brasil

关键词: biodiesel;    basic zeolites;    transesterification;   

DOI  :  10.1590/S0100-40422012000100022

来源: SciELO

【 摘 要 】

Soybean oil transesterification with ethanol was carried out in a batch reactor using USY zeolites modified with barium and strontium (15 wt.%) as catalysts. A series of three catalytic cycles were performed for each zeolite without any loss of activity. The biodiesel product was analyzed by HPLC and FT-Raman, and the catalysts by pyridine and CO2 adsorption. Ba/USY provided higher conversions (> 97%) than Sr/USY (< 75%). The increased catalytic activity of Ba/USY was attributed to two different effects: a larger number of basic sites; and a lower interaction between barium species and HUSY BrØnsted sites.

【 授权许可】

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