Integrated process of extraction and reaction of rice bran oil to produce biodiesel

IF 3.4 3区工程技术 Q2 CHEMISTRY, PHYSICAL

Journal of Supercritical Fluids Pub Date : 2025-03-18 DOI:10.1016/j.supflu.2025.106598

Suelly R. Hollas , Bárbara Moreira , Milena Garcia , Michel Corrente , Leoni Brondani , Roger Wagner , Flávio D. Mayer , Fernanda de Castilhos , Ederson R. Abaide

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Abstract

The production of fatty acid methyl esters (FAME) and fatty acid ethyl esters (FAEE) from rice bran (RB) by integrated extraction and reaction process with pressurized ethanol and dimethyl carbonate (DMC) as solvents was evaluated in this research. The first step was pressurized liquid extraction (PLE) in a semi-continuous mode (120 and 150 °C, with a solvent flow rate of 4 and 8 mL min⁻¹) and sequentially the solvent and oil were directed to a continuous reaction unit (250 °C and 300 °C) under subcritical and supercritical conditions. Soxhlet extraction was performed for comparative purposes with the PLE. The use of DMC in PLE resulted in a high oil yield (20.08 ± 0.20 % (w/w)), and lipids presented oleic and linoleic acids as the major fatty acids in their composition, with high content of free fatty acids. In the sequential reaction, DMC at 250 °C provided the highest FAME yield (96.97 wt% in 20 min).

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米糠油提取反应生产生物柴油一体化工艺研究

以米糠（RB）为原料，以加压乙醇和碳酸二甲酯（DMC）为溶剂，采用综合萃取反应工艺制备脂肪酸甲酯（FAME）和脂肪酸乙酯（FAEE）。第一步在半连续模式下（120和150°C，溶剂流速分别为4和8 mL min−1）进行加压液体萃取（PLE），然后在亚临界和超临界条件下将溶剂和油导向连续反应单元（250°C和300°C）。索氏提取与PLE进行比较。DMC在PLE中的使用使油脂得率高（20.08 ± 0.20 % (w/w)），油脂成分中以油酸和亚油酸为主要脂肪酸，游离脂肪酸含量高。在顺序反应中，250°C的DMC在20 min内获得了最高的FAME收率（96.97 wt%）。

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来源期刊

Journal of Supercritical Fluids 工程技术-工程：化工

CiteScore

7.60

自引率

10.30%

发文量

236

审稿时长

56 days

期刊介绍： The Journal of Supercritical Fluids is an international journal devoted to the fundamental and applied aspects of supercritical fluids and processes. Its aim is to provide a focused platform for academic and industrial researchers to report their findings and to have ready access to the advances in this rapidly growing field. Its coverage is multidisciplinary and includes both basic and applied topics. Thermodynamics and phase equilibria, reaction kinetics and rate processes, thermal and transport properties, and all topics related to processing such as separations (extraction, fractionation, purification, chromatography) nucleation and impregnation are within the scope. Accounts of specific engineering applications such as those encountered in food, fuel, natural products, minerals, pharmaceuticals and polymer industries are included. Topics related to high pressure equipment design, analytical techniques, sensors, and process control methodologies are also within the scope of the journal.