Rapid and efficient esterification of oleic acid by continuous liquid-phase plasma discharge

被引:7
|
作者
Bashir, Muhammad Aamir [1 ]
Wu, Sarah [1 ]
Krosuri, Anilkumar [2 ]
机构
[1] Univ Idaho, Dept Chem & Biol Engn, 875 Perimeter Dr,MS 0904, Moscow, ID 83844 USA
[2] Univ Idaho, Environm Sci Program, 875 Perimeter Dr,MS 1130, Moscow, ID 83844 USA
来源
基金
美国食品与农业研究所;
关键词
Esterification; Oleic acid; Liquid-phase plasma discharge; Biodiesel;
D O I
10.1016/j.jece.2020.104640
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Conventional esterification of fats/waste oils with high free fatty acids is time-consuming and energy intensive. In this study, a novel liquid-phase plasma discharge (LPPD) reactor was designed and evaluated for rapid esterification to convert oleic acid to biodiesel. Three LPPD operating parameters, i.e., feeding flowrate, methanol to oleic acid molar ratio (M/O), and sulfuric acid to oleic acid weight ratio (A/O), were all evaluated at five levels (1.2, 1.8, 2.4, 3.0, and 3.6 mL s(-1) for flowrate; 4, 6, 8, 10, and 12 for M/O; and 0, 1, 2, 3, and 4 % w/w for A/O) using a fractional factorial experiment design. For each experiment, three treatment times (2, 6, and 10 min) were also tested. The optimum operating parameters for the LPPD were 2.4 mL s(-1) for flowrate, 10 for M/O, and 2.0 % w/w for A/O, respectively, with the maximum conversion rate of 78 %. The power and applied voltage were consumed at 340 W and 2.12 kV during the 2-min treatment. The methyl oleate samples produced in this LPPD process were identified by GC-MS (gas-chromatography mass spectrometry) and FTIR (Fourier transform infrared spectroscopy) to confirm the esterification pathway.
引用
收藏
页数:10
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