산/알칼리 촉매에 의한 팔미트산 함유 유채유의 Biodiesel화

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

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.