Novel efficient procedure for biodiesel synthesis from waste oils with high acid value using 1-sulfobutyl-3-methylimidazolium hydrosulfate ionic liquid as the catalyst

doi:10.1016/j.cjche.2017.03.029

›› 2017, Vol. 25 ›› Issue (10): 1519-1523.DOI: 10.1016/j.cjche.2017.03.029

• Energy, Resources and Environmental Technology • Previous Articles Next Articles

Novel efficient procedure for biodiesel synthesis from waste oils with high acid value using 1-sulfobutyl-3-methylimidazolium hydrosulfate ionic liquid as the catalyst

Shuanglan Hu¹, Ying Li², Wenyong Lou^2,3

1 School of Biosciences and Bioengineering, South China University of Technology, Guangzhou 510640, China;
2 School of Food Sciences and Engineering, South China University of Technology, Guangzhou 510640, China;
3 State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China

Received:2016-10-07 Revised:2017-03-07 Online:2017-11-15 Published:2017-10-28
Supported by:
Supported by the National Natural Science Foundation of China (21676104, 21336002, 21376096), the Open Funding Project of the State Key Laboratory of Bioreactor Engineering, and the Program of State Key Laboratory of Pulp and Paper Engineering (2017ZD05).

Novel efficient procedure for biodiesel synthesis from waste oils with high acid value using 1-sulfobutyl-3-methylimidazolium hydrosulfate ionic liquid as the catalyst

Shuanglan Hu¹, Ying Li², Wenyong Lou^2,3

1 School of Biosciences and Bioengineering, South China University of Technology, Guangzhou 510640, China;
2 School of Food Sciences and Engineering, South China University of Technology, Guangzhou 510640, China;
3 State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China

通讯作者: Wenyong Lou,E-mail address:wylou@scut.edu.cn
基金资助:
Supported by the National Natural Science Foundation of China (21676104, 21336002, 21376096), the Open Funding Project of the State Key Laboratory of Bioreactor Engineering, and the Program of State Key Laboratory of Pulp and Paper Engineering (2017ZD05).

Abstract

Abstract: Preparation of biodiesel from waste oils containing 72% of free fatty acids catalyzed by a novel Brønsted acidic ionic liquid 1-sulfobutyl-3-methylimidazolium hydrosulfate ([BHSO₃MIM] [HSO₄]) was systematically investigated. The optimum molar ratio of methanol to waste oils, catalyst amount, reaction temperature and reaction time were 8/1, 10% (based on the mass of waste oils), 140℃ and 6 h, respectively, under which the obtained yield of biodiesel reached 94.9%. Also,[BHSO₃MIM] [HSO₄] as a catalyst still retained around 97% of its original catalytic activity after successive re-use of 5 batches (6 h per batch), showing the excellent operational stability. Moreover, the acidic IL[BHSO₃MIM] [HSO₄] was able to efficiently catalyze conversions of waste oils with different amounts of FFAs (free fatty acids) into biodiesel, and showed tremendous application potential. Therefore, an efficient and environmentally friendly catalyst is provided for the synthesis of biodiesel from waste oils with high acid value.

Key words: 1-Sulfobutyl-3-methylimidazolium, hydrosulfate, Biodiesel, Waste oils with high acid value, Catalyst

摘要： Preparation of biodiesel from waste oils containing 72% of free fatty acids catalyzed by a novel Brønsted acidic ionic liquid 1-sulfobutyl-3-methylimidazolium hydrosulfate ([BHSO₃MIM] [HSO₄]) was systematically investigated. The optimum molar ratio of methanol to waste oils, catalyst amount, reaction temperature and reaction time were 8/1, 10% (based on the mass of waste oils), 140℃ and 6 h, respectively, under which the obtained yield of biodiesel reached 94.9%. Also,[BHSO₃MIM] [HSO₄] as a catalyst still retained around 97% of its original catalytic activity after successive re-use of 5 batches (6 h per batch), showing the excellent operational stability. Moreover, the acidic IL[BHSO₃MIM] [HSO₄] was able to efficiently catalyze conversions of waste oils with different amounts of FFAs (free fatty acids) into biodiesel, and showed tremendous application potential. Therefore, an efficient and environmentally friendly catalyst is provided for the synthesis of biodiesel from waste oils with high acid value.

关键词: 1-Sulfobutyl-3-methylimidazolium, hydrosulfate, Biodiesel, Waste oils with high acid value, Catalyst

Shuanglan Hu, Ying Li, Wenyong Lou. Novel efficient procedure for biodiesel synthesis from waste oils with high acid value using 1-sulfobutyl-3-methylimidazolium hydrosulfate ionic liquid as the catalyst[J]. , 2017, 25(10): 1519-1523.

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Novel efficient procedure for biodiesel synthesis from waste oils with high acid value using 1-sulfobutyl-3-methylimidazolium hydrosulfate ionic liquid as the catalyst

Novel efficient procedure for biodiesel synthesis from waste oils with high acid value using 1-sulfobutyl-3-methylimidazolium hydrosulfate ionic liquid as the catalyst

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