کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6631183 | 1424940 | 2018 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Experimental and kinetic modeling of acid oil (trans)esterification in supercritical ethanol
ترجمه فارسی عنوان
مدلسازی تجربی و جنبشی روغن اسیدی (ترانس) در اتانول فوق بحرانی
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کلمات کلیدی
بیودیزل، اتانول فوق بحرانی، روند مداوم، روغن اسیدی، سینتیک،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
This work reports experimental and kinetic modeling of the coupled esterification and transesterification reactions ((trans)esterification) of a model acid oil (a mixture of soybean oil and oleic acid) using ethanol at sub and supercritical conditions in a continuous tubular reactor. Process variables, namely temperature (220-350â¯Â°C), pressure (100-200â¯bar) and ethanol to acid oil molar ratio (2:1-20:1) as well as the effect of the initial amount of free fatty acids in the raw material were studied. The best condition for the ethylic supercritical (trans)esterification of soybean oil with 20â¯wt% of oleic acid was 280â¯Â°C, 100â¯bar, and ethanol to acid oil molar ratio of 4:1, where 80% of ester yield was reached in 60â¯min. It was observed that increasing the free fatty acid content increased the reaction rate and reaction yield. The proposed autocatalytic kinetic model presented a good fit in relation to the experimental data.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuel - Volume 224, 15 July 2018, Pages 489-498
Journal: Fuel - Volume 224, 15 July 2018, Pages 489-498
نویسندگان
Kallynca Carvalho dos Santos, Fabiane Hamerski, Fernando A. Pedersen Voll, Marcos L. Corazza,