One-step production of biodiesel from oils with high acid value by activated Mg–Al hydrotalcite nanoparticles
| 论文编号: | |||||||||
| 作者: | Wang YT | ||||||||
| 刊物名称: | Bioresource Technology | ||||||||
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| 论文题目英文: | One-step production of biodiesel from oils with high acid value by activated Mg–Al hydrotalcite nanoparticles | ||||||||
| 年: | Jun 2015 | ||||||||
| 卷: | 193 | ||||||||
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| 页: | 84-89 | ||||||||
| 联系作者: | Fang Z | ||||||||
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| 影响因子: | 4.494 | ||||||||
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| 摘要: | Activated Mg–Al hydrotalcite (HT-Ca) nanoparticles (<45 nm) were synthesized by co-precipitation and hydrothermal activation with aqueous Ca(OH)2 solution. They were characterized by various techniques including X-ray diffraction, inductively coupled plasma atomic-emission spectrometer, Brunauer–Emm ett–Teller method, scanning electronic microscope-X-ray energy dispersive analysis and temperature programmed desorption method. HT-Ca presented both acidic and basic due to the formation of Mg4Al2(OH)14·3H2O, Mg2Al(OH)7 and AlO(OH) nanocrystals to esterify and transesterify oils with high acid value (AV). Under conditions of 5 wt% HT-Ca, 160℃, 30/1 methanol/oil molar ratio and 4 h, 93.4% Jatropha biodiesel yield was obtained at AV of 6.3 mg KOH/g with 4 cycles (biodiesel yield > 86%). It was further found that it can resist free fatty acids, and biodiesel yield reached 92.9% from soybean oil with high AV of 12.1. HT-Ca catalyst showed a potential practical application for direct production of biodiesel from oils with high AV without pretreatment. | ||||||||
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