TY - JOUR AB - Supercritical methyl acetate has been proven to convert triglycerides into fatty acid methyl esters (FAMEs) and triacetin. Due to the low reactivity of supercritical methyl acetate on triglycerides, reaction condition of 350 degrees C/20 MPa/45 min is needed to obtain the highest yield of 96.7 wt.% FAME and 8.8 wt% triacetin (total 105.5 wt.%). Yet, under such condition, thermal decomposition of products is inevitable, thus, further yield increments are hard to attain. This study was, therefore, done to know the possible use of additives in increasing the reaction rate of the supercritical process. Oleic acid, acetic acid, methanol and water were evaluated as additives. It was discovered that acetic acid and water additions improved the performance of supercritical methyl acetate method. Surprisingly, when both additives were used simultaneously as aqueous acetic acid, the higher yield was obtainable at a lower reaction temperature. The addition of 10 wt.% aqueous acetic acid (25 wt.% concentration) at 300 degrees C/20 MPa/45 min yielded 96.8 wt.% FAME and 12.9 wt.% triacetin (total 109.7 wt.%), thus, it is considered as a potential additive in biodiesel production by supercritical methyl acetate method. (C) 2014 Elsevier B.V. All rights reserved. AD - Kyoto Univ, Grad Sch Energy Sci, Dept Socioenvironm Energy Sci, Sakyo Ku, Kyoto 6068501, Japan AN - WOS:000337876300014 AU - Goembira, F. AU - Saka, S. DA - Sep DO - 10.1016/j.fuproc.2014.03.035 J2 - Fuel Process Technol KW - biodiesel LA - English N1 - Aj7kt PY - 2014 SN - 0378-3820 SP - 114-118 ST - Effect of additives to supercritical methyl acetate on biodiesel production T2 - Fuel Processing Technology TI - Effect of additives to supercritical methyl acetate on biodiesel production UR - ://WOS:000337876300014 VL - 125 ID - 9991 ER -