Catalyst-free Ethyl Biodiesel Production from Rice Bran under Subcritical Condition

Zullaikah, Siti and Afifudin, Riza and Amalia, Rizky (2015) Catalyst-free Ethyl Biodiesel Production from Rice Bran under Subcritical Condition. Catalyst-free Ethyl Biodiesel Production from Rice Bran under Subcritical Condition, 1699 (1). pp. 1-7. ISSN 1551-7616

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Official URL: http://aip.scitation.org/doi/abs/10.1063/1.4938307

Abstract

In-situ ethyl biodiesel production from rice bran under subcritical water and ethanol with no catalyst was employed. This process is environmentally friendly and is very flexible in term of feedstock utilization since it can handle relatively high moisture and free fatty acids (FFAs) contents. In addition, based on the biorefinery concept aiming to use the whole biomass for variety of applications, ethanolysis of rice bran into ethyl biodiesel leading to a 100 biodiesel. The influences of the operating variables such as reaction time (1 ? 10 h), ethanol concentration (12.5 ? 87.5), and pressurizing gas (N2 and CO2) on the ethyl biodiesel yield and purity have been investigated systematically while the temperature and pressure were kept constant at 200 �C and 40 bar. The optimum results were obtained at 5 h reaction time and 75 ethanol concentration using CO2 as compressing gas. Ethyl biodiesel yield and purity of 58.78 and 61.35, respectively, were obtained using rice bran with initial FFAs content of 37.64. FFAs level was reduced to 14.22 with crude biodiesel recovery of 95.98. Increasing the reaction time up to 10 h only increased the yield and purity by only about 3. Under N2 atmosphere and at the same operating conditions (5h and 75 ethanol), ethyl biodiesel yield and purity decreased to 54.63 and 58.07, respectively, while FFAs level was increased to 17.93 and crude ethyl biodiesel recovery decreased to 87.32.

Item Type: Article
Additional Information: 662.88 Zul c
Uncontrolled Keywords: Ethyl biodiesel; rice bran; in situ; subcritical water; subcritical ethanol.
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: 13 Dec 2017 06:57
Last Modified: 24 Aug 2018 08:11
URI: http://repository.its.ac.id/id/eprint/44022

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