Biodiesel production via ethylic transesterification with basic zeolites

Quimica nova

Ghesti, Grace F.¹  Macedo, Julio L. de¹  Dias, José A.¹  Dias, Sílvia C. L.¹ 

[1] Universidade de Brasília, Brasília, Brasil

关键词: biodiesel;    basic zeolites;    transesterification.;   

DOI  :  10.1590/S0100-40422012000100022

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 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】

CC BY