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Fuel Characteristics of Biodiesel Produced from a High-Acid Oil from Soybean Soapstock by Supercritical-Methanol Transesterification
Energies 2012, 5(8), 2759-2770; doi:10.3390/en5082759

Deacidification of Pistacia chinensis Oil as a Promising Non-Edible Feedstock for Biodiesel Production in China

1,2,* , 1
1 Key Laboratory for Resource Exploration Research of Hebei Province, Hebei University of Engineering, Handan, Hebei 056038, China 2 State Key Laboratory of Coal Resources and Safe Mining, China University of Mining & Technology, Beijing 100008, China
* Author to whom correspondence should be addressed.
Received: 1 March 2012 / Revised: 29 June 2012 / Accepted: 20 July 2012 / Published: 31 July 2012
(This article belongs to the Special Issue Biomass and Biofuels 2012)
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Pistacia chinensis seed oil is proposed as a promising non-edible feedstock for biodiesel production. Different extraction methods were tested and compared to obtain crude oil from the seed of Pistacia chinensis, along with various deacidification measures of refined oil. The biodiesel was produced through catalysis of sodium hydroxide (NaOH) and potassium hydroxide (KOH). The results showed that the acid value of Pistacia chinensis oil was successfully reduced to 0.23 mg KOH/g when it was extracted using ethanol. Consequently, the biodiesel product gave a high yield beyond 96.0%. The transesterification catalysed by KOH was also more complete. Fourier transform infrared (FTIR) spectroscopy was used to monitor the transesterification reaction. Analyses by gas chromatography-mass spectrometry (GC-MS) and gas chromatography with a flame ionisation detector (GC-FID) certified that the Pistacia chinensis biodiesel mainly consisted of C18 fatty acid methyl esters (81.07%) with a high percentage of methyl oleate. Furthermore, the measured fuel properties of the biodiesel met the required standards for fuel use. In conclusion, the Pistacia chinensis biodiesel is a qualified and feasible substitute for fossil diesel.
Keywords: biodiesel; Pistacia chinensis seed oil; deacidification; transesterification biodiesel; Pistacia chinensis seed oil; deacidification; transesterification
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Qin, S.; Sun, Y.; Shi, C.; He, L.; Meng, Y.; Ren, X. Deacidification of Pistacia chinensis Oil as a Promising Non-Edible Feedstock for Biodiesel Production in China. Energies 2012, 5, 2759-2770.

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