کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
231522 1427427 2011 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Recovery of triglycerides from used frying oil by extraction with liquid and supercritical ethane
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Recovery of triglycerides from used frying oil by extraction with liquid and supercritical ethane
چکیده انگلیسی

The extraction of triglycerides from used frying oil with liquid and supercritical ethane has been studied in a semibatch system at different temperatures (25–80 °C) and pressures (150–250 kg/cm2). It has been found that isobaric decreases of temperature and isothermal increases of pressure lead to both increasing extraction yields and decreasing separation efficiencies. Lipid fractions recovered in the high density region had acceptable concentrations of polar compounds.Results with ethane have been compared to those reported for CO2 in earlier works. At similar reduced densities of the solvents, oil solubility in ethane was higher than in CO2, being the separation efficiency of polar fractions slightly better when using ethane.The extraction process was further analyzed in a packed countercurrent column. At optimum conditions (250 kg/cm2, 25 °C, and solvent-to-oil ratio 45 g:g) about 85% of the triglycerides were recovered, being 11.2% the polar content of the triglyceride fraction recovered.

Figure optionsDownload as PowerPoint slideResearch highlights▶ Triglycerides separated from used frying oil by extraction with dense ethane. ▶ Optimum extraction conditions corresponded to the high density region. ▶ At such conditions, about 85% of triglycerides recovered and polar content reduced to one-third. ▶ Ethane was better than CO2 for the selective extraction of triglycerides from oil.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: The Journal of Supercritical Fluids - Volume 56, Issue 1, February 2011, Pages 72–79
نویسندگان
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