SnSO4 as Catalyst for Simultaneous Transesterification and Esterification of Acid Soybean Oil

Journal of the Brazilian Chemical Society

Camila O. Pereira¹  Márcio F. Portilho¹  Cristiane A. Henriques¹  Fatima M. Z. Zotin¹ 

关键词: biodiesel;    esterification;    model acid oil;    SnSO4;    tin catalysts;   

DOI  :  10.5935/0103-5053.20140267

来源: SciELO

【 摘 要 】

Biodiesel is an alternative biodegradable and non-toxic biofuel produced from renewable resources. Industrially, it is produced by catalytic transesterification of refined vegetable oil with methanol or ethanol. Biodiesel production costs can be reduced by using non-refined feedstocks whose market prices are lower than those of refined vegetable oils. This work studied the use of tin(II) sulfate (SnSO4), as catalyst for the simultaneous transesterification and esterification of model acid oil containing high levels of free fatty acids. The influence of experimental parameters, catalyst leaching as well as its reusability was investigated. For a model feedstock containing 70 wt. % of free fatty acids (oleic acid), the highest biodiesel yield (92%) was obtained at 100 ºC, under autogenous pressure, using 5 wt. % of SnSO4 in excess of ethanol after 3 h of reaction. The catalyst was reused ten times without significant decrease in biodiesel yield.

【 授权许可】

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