Zullaikah, Siti and Rahkadima, Yulia Tri (2015) In-situ Biodiesel and Sugar Production From Rice Bran Under Subcritical Condition. In-situ biodiesel and sugar production from rice bran under subcritical condition, 1699 (030030). pp. 1-7. ISSN 1551-7616
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Abstract
An integrated method of producing biodiesel and sugar using subcritical water and methanol has been employed as a
potential way to reduce the high cost of single biofuel production from rice bran. The effects of temperature, methanol to water
ratio and reaction time on the biodiesel yield and purity, and the concentration of sugar in hydrolysate were investigated
systematically. Biodiesel with yield and purity of 65.21%and 73.53%, respectively, was obtained from rice bran with initial free
fatty acid (FFA) content of 37.64% under the following conditions: T= 200 oC, P= 4.0 MPa (using CO2 as pressurizing gas), ratio
of rice bran/water/methanol of 1/2/6 (g/mL/mL), and 3 h of reaction time. FFAs level was reduced to 10.00% with crude
biodiesel recovery of 88.69%. However, the highest biodiesel yield (67.39%) and crude biodiesel recovery (100.00%) were
obtained by decreasing the amount of methanol so that the ratio of rice bran/water/methanol became 1/4/4, g/mL/mL. In addition,
the highest sugar concentration of 0.98 g/L was obtained at 180 oC and 4.0 MPa with ratio of rice bran/water/methanol of 1/4/4
(g/mL/mL) and reaction time of 3 h. Since no catalyst was employed and the biodiesel and reducing sugar were produced directly
from rice bran with high water and FFA contents, the process was simple and environmentally friendly, which would make the
production of biofuel more economical and sustainable.
| Item Type: | Article |
|---|---|
| Additional Information: | 662.88 Zul i |
| Uncontrolled Keywords: | Biodiesel; sugars; rice bran; in situ; hydrolysis; subcritical water; subcritical methanol. |
| Subjects: | T Technology > TP Chemical technology > TP156 Crystallization. Extraction (Chemistry). Fermentation. Distillation. Emulsions. |
| Divisions: | Faculty of Industrial Technology > Chemical Engineering |
| Depositing User: | Siti Zullaikah |
| Date Deposited: | 14 Dec 2017 03:19 |
| Last Modified: | 14 Dec 2017 03:19 |
| URI: | http://repository.its.ac.id/id/eprint/44271 |
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