水和游离脂肪酸对DBU催化制备生物柴油的影响

doi:10.16085/j.issn.1000-6613.2017-2237

化工进展 ›› 2018, Vol. 37 ›› Issue (09): 3386-3392.DOI: 10.16085/j.issn.1000-6613.2017-2237

水和游离脂肪酸对DBU催化制备生物柴油的影响

袁川^1,2, 鲁厚芳^1,2, 刘长军¹, 蒋炜¹, 刘颖颖², 梁斌^1,2

1 四川大学化学工程学院, 四川成都 610065;
2 四川大学新能源与低碳技术研究院, 四川成都 610065

收稿日期:2017-11-01 修回日期:2017-11-29 出版日期:2018-09-05 发布日期:2018-09-05
通讯作者: 刘颖颖,博士,助理研究员,研究方向为化工过程新工艺开发。
作者简介:袁川(1991-),男,硕士研究生。E-mail:yuanchuan4807@163.com。
基金资助:
国家自然科学基金项目（21476150）。

Effects of water and free fatty acids on biodiesel production using DBU as catalyst

YUAN Chuan^1,2, LU Houfang^1,2, LIU Changjun¹, JIANG Wei¹, LIU Yingying², LIANG Bin^1,2

1 School of Chemical Engineering, Sichuan University, Chengdu 610065, Sichuan, China;
2 Institute of New Energy and Low Carbon Technology, Sichuan University, Chengdu 610065, Sichuan, China

Received:2017-11-01 Revised:2017-11-29 Online:2018-09-05 Published:2018-09-05

摘要/Abstract

摘要： 以低品质油脂作为生产生物柴油的原料可以有效降低产品的成本。催化剂对原料油中主要杂质游离脂肪酸和水分的耐受程度决定了该工艺对原料油的适应性。本文采用有机碱1，8-二氮杂双环[5，4，0]十一碳-7-烯（DBU）催化酯交换反应制备生物柴油，研究了不同水和游离脂肪酸含量下酯交换反应的转化率、反应后产物两相的组成以及各组分在两相的分配。结果表明，DBU作为催化剂时，对水和游离脂肪酸具有较强的耐受性：水含量小于2%（质量分数，下同），游离脂肪酸含量小于5%；1.5%左右的水对反应具有促进作用，水含量为1.5%时，酯交换转化率最高可达93.7%。此外，水和游离脂肪酸会降低甲醇、DBU在甲酯相中的分布，这使得甲酯相中甲酯的纯度有所上升。

关键词: 生物柴油, 水, 游离脂肪酸, 酯交换反应, 1, 8-二氮杂双环[5.4.0]十一碳-7-烯

Abstract: It is an effective way to decrease the cost of biodiesel using low-quality fats and oils as feedstock. The choice of feedstock however is dependent on the tolerance of the catalyst to the impurities (such as free fatty acids and moisture). In this paper, an organic base 1,8-diazabicyclo-[5.4.0]-undec-7-ene (DBU) was used to catalyze the transesterification reaction to produce biodiesel. The effects of water and free fatty acid content on the conversion of transesterification, the phase composition and the distribution of the components after the reaction were studied. It showed that the DBU catalyst has an excellent tolerance to water and free fatty acid (water < 2% or FFA < 5%). Furthermore, the presence of about 1.5% water can improve the conversion of the reaction. The highest conversion of 93.7% was obtained when the water content was 1.5%. In addition, the distribution of methanol and DBU in the biodiesel-rich phase decreased with the increase of water and FFA content. As a result, the purity of biodiesel in the biodiesel-rich phase increased.

Key words: biodiesel, water, free fatty acid, transesterification, DBU

中图分类号:

TE667

袁川, 鲁厚芳, 刘长军, 蒋炜, 刘颖颖, 梁斌. 水和游离脂肪酸对DBU催化制备生物柴油的影响[J]. 化工进展, 2018, 37(09): 3386-3392.

YUAN Chuan, LU Houfang, LIU Changjun, JIANG Wei, LIU Yingying, LIANG Bin. Effects of water and free fatty acids on biodiesel production using DBU as catalyst[J]. Chemical Industry and Engineering Progress, 2018, 37(09): 3386-3392.

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水和游离脂肪酸对DBU催化制备生物柴油的影响

Effects of water and free fatty acids on biodiesel production using DBU as catalyst

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