菜籽油脱臭馏出物中生物柴油的分子蒸馏分离工艺研究

邵平; 姜绍通; 赵妍嫣; 罗水忠

菜籽油脱臭馏出物中生物柴油的分子蒸馏分离工艺研究

Separation of biodiesel from rapeseed oil deodorizer distillate by molecular distillation

摘要

摘要: 为了实现脱臭馏出物的清洁加工，运用分子蒸馏技术分离菜籽油脱臭馏出物中合成的生物柴油，考察了分子蒸馏的操作参数对生物柴油回收率的影响，研究结果表明：当系统压力为5.3 Pa，蒸发面温度120℃，进料温度70℃，刮膜转速150 r/min，进料速率120 mL/h时，生物柴油回收率达到41 g/100 mL。馏出物经高分辨气相色谱-质谱进行分离鉴定，共检出6种脂肪酸甲酯成分：其中棕榈酸甲酯33.61%，油酸甲酯16.14%，亚油酸甲酯18.25%，硬脂酸甲酯8.81%，芥酸甲酯7.39%，贡多酸甲酯3.78%,脂肪酸甲酯总含量占89%以上。

Abstract: The effects of operation parameters on separation of fatty acid methyl ester(FAME) from rapeseed oil deodorizer distillate(RODD) by molecular distillation were investigated for further utilization of RODD. The results indicated that the recovery of FAME was 41 g/(100 mL) when pressure was 5.2 Pa, evaporating temperature was 120℃, feed temperature was 70℃, wiper rolling speed was 150 r/min, feed rate was 120 mL/h. The biodiesel was analyzed by GC-TOFMS. Six fatty acid methyl ester components were determined by normalization method of area. The main components with high relative content include 33.61% palmitic methyl ester, 18.25% linoleic methyl ester, 16.14% oleic methyl ester, 8.81% stearic methyl ester, 7.39% erucic methyl ester, 3.78% gondoic methyl ester. And the total fatty acid ester reaches 89%.

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