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http://dx.doi.org/10.12925/jkocs.2006.23.4.4

Conversion of Rapeseed Oil Containing Palmitic Acid into Biodiesel by Acid/Alkali Catalysts  

Hyun, Young-Jin (Department of Chemical Engineering & Clean Technology, Cheju National University)
Kim, Hae-Sung (Department of Chemical Engineering, Myongji University)
Publication Information
Journal of the Korean Applied Science and Technology / v.23, no.4, 2006 , pp. 300-306 More about this Journal
Abstract
The esterification of palmitic acid in rapeseed oil and methanol emulsified by propylene glycol with PTSA(p-toluene sulfonic acid) was followed by the transesterification of rapeseed oil into biodiesel with 1(w/v)% GMS(glycerol monostearate) as an emulsifier using TMAH(tetramethyl ammonium hydroxide) catalysts at $60^{\circ}C$. The former reaction was optimized at the 1:20 of molar ratio of oil to methanol and 5wt% PTSA, and the latter was optimized at the 1:8 of molar ratio of oil to methanol and 0.8wt% TMAH. The overall conversion into biodiesel was 98% after 60min of reaction time at the 1:8 of molar ratio, 0.8wt% TMAH and $60^{\circ}C$. TMAH was a good catalyst to control the viscosity of biodiesel mixture.
Keywords
esterification; PTSA; transesterification; TMAH; overall conversion; viscosity of biodiesel;
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