Effect of Extraction Time on Unreacted Oil Removal in Biodiesel Purification Using Deep Eutectic Solvent

H. Niawanti, S. Zullaikah
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引用次数: 4

Abstract

Rice bran oil (RBO) based biodiesel contains unreacted oil such as monoglyceride (MG), diglyceride (DG) and triglyceride (TG) to be purified. The liquid-liquid extraction (LLE) method was used for purification using Deep Eutectic Solvent (DES). The objective of this work was to study the effect of extraction time on unreacted oil removal. RBO containing 16.49% oil with free fatty acids (FFA) content of 44.75%. Acid catalyzed methanolysis was used for biodiesel production under operating conditions: T = 60°C, t = 8 hours, molar ratio of oil/methanol  was 1/10, H2SO4 1% w/w of RBO. Crude biodiesel containing 89.05% fatty acid methyl ester (FAME), 0.05% FFA, TG 4.03%, DG 4.01%  and MG 0.30%. DES was made from choline chloride and ethylene glycol with 1/2 molar ratio, while molar ratio of biodiesel/DES was 1/2. The extraction time was varied from 15 to 240 minutes at 30°C. The highest TG, DG and MG removal were obtained at 240 minutes, they were 3.01%, 0.22% and 0.03%, respectively. FAME and FFA content were 96.55% and 0.03%. Keywords: biodiesel; DES; extraction; unreacted oil; purification
萃取时间对深度共熔溶剂净化生物柴油中未反应油去除的影响
米糠油(RBO)为基础的生物柴油含有未反应的油,如单甘油酯(MG),二甘油酯(DG)和甘油三酯(TG)需要纯化。采用液液萃取(LLE)法,采用深度共熔溶剂(DES)进行纯化。研究了萃取时间对未反应除油的影响。RBO油含16.49%,游离脂肪酸(FFA)含量44.75%。采用酸催化甲醇裂解法生产生物柴油,操作条件为:温度60℃,时间8小时,油/甲醇摩尔比为1/10,H2SO4为1% w/w RBO。脂肪酸甲酯(FAME)含量89.05%,FFA含量0.05%,TG含量4.03%,DG含量4.01%,MG含量0.30%。氯化胆碱与乙二醇的摩尔比为1/2,生物柴油与DES的摩尔比为1/2。在30℃条件下,提取时间为15 ~ 240 min。在240 min时,TG、DG和MG的去除率最高,分别为3.01%、0.22%和0.03%。FAME和FFA含量分别为96.55%和0.03%。关键词:生物柴油;DES;提取;未反应的石油;净化
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