کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6637902 461149 2014 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influence of vegetable oil fatty acid composition on ultrasound-assisted synthesis of biodiesel
ترجمه فارسی عنوان
تأثیر ترکیب اسید چرب روغن زیتون بر سنتز با استفاده از سنتز بیودیزل
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی
Ultrasound is considered as one of the most attractive energies to assist biodiesel transesterification. The objective is to reduce the reaction time while saving energy. In the present study, four oils showing a wide range of fatty acid composition have been transesterified using ultrasound as auxiliary energy. Samples included unsaturated fatty acids (rapeseed and soybean) oils and saturated fatty acids (coconut and palm) oils. Transesterification reactions were conducted in batch and an ultrasound probe working under a fixed frequency of 20 kHz was used to facilitate the overall process. According to the design of experiments, variable duty cycle and amplitude, besides different concentrations of basic catalyst (KOH) and methanol-to-oil molar ratio were studied. The optimal fatty acid methyl ester (FAME) values were 95.03% for rapeseed biodiesel, 94.66% for soybean biodiesel, 81.37% for coconut biodiesel and 93.08% for palm biodiesel. A response surface methodology (RSM) was applied to determine the reaction parameters with a significant impact on response variables. Results showed that the length of chain and in a lower extent unsaturation degree of fatty acids have a significant effect on ultrasound assisted transesterification. In this sense, oils with higher unsaturation degree and long hydrocarbon chains provide higher FAME yields and lower glyceride concentrations than those with saturated fatty acids and short hydrocarbon chains.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuel - Volume 125, 1 June 2014, Pages 183-191
نویسندگان
, , , , , ,