超临界CO_2下麻疯树籽制备生物柴油及无毒籽粕

Production of Biodiesel and Nontoxic Jatropha Meal From Jatropha Curcas Seeds in Supercritical Carbon Dioxide

以麻疯树种仁为原料,在超临界CO2(Super critical CO2,SC-CO2)中一步法制备生物柴油和无毒籽粕,考察了麻疯树种仁粒径大小、含水量对反应产物中脂肪酸甲酯(FAME)质量分数和籽粕中佛波酯(PE)质量分数的影响;对反应过程中的反应压力、反应温度、反应时间、醇/油摩尔比(n(Methanol)/n(Oil))进行了单因素和正交实验的考察。实验得到的最佳反应条件是种仁粒径粉碎至60目、水质量分数2.11%左右,反应压力15 MPa,反应温度80℃,反应150min,醇/油摩尔比30。在此条件下,反应产物中FAME质量分数达到95%,籽粕中残留PE质量分数为0.06mg/g,达到无毒标准。

The preparation of biodiesel and nontoxic Jatropha meal in supercritical carbon dioxide （SC-CO2） from Jatropha kernels was carried out in laboratory. The effects of the moisture mass fraction and particle size of Jatropha curcas kernel on the fatty acid methyl ester （FAME） mass fraction in the biodiesel and phorbol ester （PE） mass fraction in the Jatropha curcas meal were investigated. The reaction conditions including n（Methanol）/n（Oil）, reaction pressure, temperature and time were optimized by the mono-factor and orthogonal experiments. When the Jatropha curcas kernel with crushing to 60 mesh and the moisture mass fraction of appreciate 2.11% were used as raw material, under the reaction conditions of 15 MPa, 80℃, n（Methanol） /n（ Oil） =30 and reaction time 150 min, the FAME and PE mass fractions in production achieved, respectively, 95% and 0.06 mg/g, which was below the nontoxic standard.