Analysis on the supercritical fluid in-situ preparation and properties of biodiesel

作者：Cao Ning^*; Wang Yong; Liu Minglei; Zhang Guizhi; Zhang Yuan

来源：Journal of Basic Science and Engineering, 2014, 22(6): 1150-1155.

DOI：10.16058/j.issn.1005-0930.2014.06.011

• Chemical compositions
• Gas chromatography-mass spectrometry
• In-situ reactions
• Reduce energy consumption
• Structural characteristics
• Supercritical condition
• Supercritical fluid technology
• Two-step transesterification

In order to achieve efficient use of biomass and reduce energy consumption, in-situ supercritical fluid technology was employed to prepare biodiesel from rapeseed. The caloric value of the biodiesel was both determined by the oxygen bomb method and calculated by means of Dulong caloric value equation, and a comparative study was then carried out on this basis. By means of fourier infrared spectroscopy and gas chromatography-mass spectrometry, the chemical composition, molecular structure and functional groups of the prepared biodiesel were characterized. Meanwhile, the performance and structural characteristics of liquid-phase flammable oils under supercritical condition were discussed. The results indicate that not only the oil in biomass can participate in transesterification but also the carbohydrate and protein can be converted into long-chain alkyl ester of high caloric value by the decomposition/reorganization reaction. Compared with the oil extraction-two-step transesterification method, this method improves the utilization rate of biomass.

• 出版日期2014
• 单位中国石油大学（华东）