Biodiesel production from rice bran by a two-step in-situ process.
The production of fatty acid methyl esters (FAMEs) by a two-step in-situ transesterification from two kinds of rice bran was investigated in this study. The method included an in-situ acid-catalyzed esterification followed by an in-situ base-catalyzed transesterification. Free fatty acids (FFAs) level was reduced to less than 1% for both rice bran A (initial FFAs content=3%) and rice bran B (initial FFAs content=30%) in the first step under the following conditions: 10 g rice bran, methanol to rice bran ratio 15 mL/g, H(2)SO(4) to rice bran mass ratio 0.18, 60 degrees C reaction temperature, 600 rpm stirring rate, 15 min reaction time. The organic phase of the first step product was collected and subjected to a second step reaction by adding 8 mL of 5N NaOH solution and allowing to react for 60 and 30 min for rice bran A and rice bran B, respectively. FAMEs yields of 96.8% and 97.4% were obtained for rice bran A and rice bran B, respectively, after this two-step in-situ reaction.
Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan.
Pei-Jing
PJ
Shiu
Setiyo
S
Gunawan
Wen-Hao
WH
Hsieh
Novy S
NS
Kasim
Yi-Hsu
YH
Ju
D001674:Bioelectric Energy Sources; D056804:Biofuels; D019149:Bioreactors; D002384:Catalysis; D004736:Energy-Generating Resources; D004951:Esterification; D004952:Esters / Q000737:chemistry*; D005227:Fatty Acids / Q000737:chemistry*; D000432:Methanol / Q000737:chemistry; D012275:Oryza / Q000378:metabolism*; D010938:Plant Oils; D012972:Sodium Hydroxide / Q000737:chemistry; D013997:Time Factors
D056804:Biofuels; D004952:Esters; D005227:Fatty Acids; D010938:Plant Oils; D012972:Sodium Hydroxide; D000432:Methanol