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首页> 外文期刊>Waste and biomass valorization >Biodiesel Production from High FFA Degummed Rice Bran Oil by a Two-Step Process Using Ethanol/Methanol and a Green Catalyst
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Biodiesel Production from High FFA Degummed Rice Bran Oil by a Two-Step Process Using Ethanol/Methanol and a Green Catalyst

机译:使用乙醇/甲醇和绿色催化剂通过两步法从高FFA脱胶米糠油生产生物柴油

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摘要

Degummed rice bran oil (DRBO) is a low cost raw material considered an excellent alternative to reduce the cost of biodiesel production. The aim of this study was to optimize the esterification process of DRBO. In the first stage, using 100 % of ethanol, nontoxic alcohol obtained from renewable source and ferric sulphate (Fe_2(SO_4)_3) as environmentally friendly catalyst adjusting DRBO for the transesterification process in the second step. The raw material had free fatty acids (FFAs) content reduced from 21.8 to 3.0 %, by ethanol esterification reaching 85.8 % conversion of FFA to fatty acid ethyl esters (FAEE), when the molar ratio ethanol:DRBO was 8:1, 3 % of Fe_2(SO_4)_3 by weight and 3 h of reaction time at the reflux temperature of ethanol. In the second step of the reaction by transesterification, potassium hydroxide (KOH) was used as catalyst in a range from 1.0 to 1.75 % by weight of the esterified oil, the molar ratio methanol:oil (6:1), magnetic stirring of 450 rpm and temperature of 60 ℃ in 1 h of reaction time. After the two steps reaction, the maximum conversion achieved was 96.6 % of the mixture of FAEE and fatty acid methyl esters.
机译:脱胶米糠油(DRBO)是一种低成本原料,被认为是降低生物柴油生产成本的绝佳替代品。这项研究的目的是优化DRBO的酯化过程。在第一阶段中,使用100%的乙醇,可再生资源获得的无毒酒精和硫酸铁(Fe_2(SO_4)_3)作为环境友好的催化剂,在第二步中调整DRBO用于酯交换过程。当乙醇:DRBO的摩尔比为8:1、3%时,通过乙醇酯化反应,原料中的游离脂肪酸(FFA)含量从21.8%降低至3.0%,FFA转化为脂肪酸乙酯(FAEE)的转化率为85.8% Fe_2(SO_4)_3的重量比和乙醇回流温度下3小时的反应时间。在酯交换反应的第二步中,使用氢氧化钾(KOH)作为催化剂,其用量为酯化油重量的1.0%至1.75%,甲醇:油的摩尔比(6:1),磁力搅拌为450 rpm和温度为60℃的反应时间为1 h。在两步反应之后,达到的最大转化率为FAEE和脂肪酸甲酯的混合物的96.6%。

著录项

  • 来源
    《Waste and biomass valorization》 |2015年第3期|343-351|共9页
  • 作者单位

    Faculty of Chemistry, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul 90619-900, Brazil,Graduate Program in Material Engineering and Technology, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul 90619-900, Brazil;

    Faculty of Chemistry, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul 90619-900, Brazil,Graduate Program in Material Engineering and Technology, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul 90619-900, Brazil;

    Faculty of Chemistry, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul 90619-900, Brazil,Graduate Program in Material Engineering and Technology, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul 90619-900, Brazil;

    Faculty of Chemistry, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul 90619-900, Brazil,Graduate Program in Material Engineering and Technology, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul 90619-900, Brazil;

    Faculty of Chemistry, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul 90619-900, Brazil,Graduate Program in Material Engineering and Technology, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul 90619-900, Brazil,Institute of Petroleum and Natural Resources, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul 90619-900, Brazil;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Degummed rice bran oil; Ethanol/methanol; Ferric sulphate; Esterification/transesterification;

    机译:米糠油脱胶;乙醇/甲醇;硫酸铁;酯化/酯交换;

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