Continuous Production of Biodiesel from Soybean Oil in Supercritical Ethanol and Carbon Dioxide as Cosolvent

被引:65
作者
Bertoldi, Cristiane [1 ]
da Silva, Camila [1 ,2 ]
Bernardon, Joao P. [1 ]
Corazza, Marcos L. [1 ,3 ]
Cardozo Filho, L. [2 ]
Oliveira, J. Vladimir [1 ]
Corazza, Fernanda C. [1 ,3 ]
机构
[1] URI Campus Erechim, Dept Food Engn, BR-99700000 Erechim, RS, Brazil
[2] Maringa State Univ UEM, Dept Chem Engn, BR-87020900 Maringa, Parana, Brazil
[3] Parana Fed Univ UFPR, Polytech Ctr, DTQ ST, Dept Chem Engn, BR-82530990 Curitiba, Parana, Brazil
关键词
ACID ETHYL-ESTERS; RAPESEED OIL; FUEL PRODUCTION; METHYL ESTERIFICATION; VEGETABLE-OILS; SUNFLOWER OIL; PLUS ETHANOL; FATTY-ACIDS; METHANOL; TRANSESTERIFICATION;
D O I
10.1021/ef900402r
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
This work investigates the effect of carbon dioxide as cosolvent on the production of fatty acid ethyl esters from soybean oil transesterification in supercritical ethanol in a continuous catalyst-free process. The experiments were performed in a tubular reactor in the temperature range of 573-623 K, from 7.5 to 20 MPa, with an oil to ethanol molar ratio ranging from 1: 10 to 1:40 and cosolvent to substrates mass ratio from 0: 1 to 0.5: 1. Results showed that the yield of ethyl esters decreased with increasing addition of carbon dioxide to the system. The reaction conversion was noticed to decrease at lower substrates flow-rates due to products decomposition. Considerable reaction yields were achieved at 623 K, 10 MPa, oil to ethanol molar ratio of 1:40 and using a CO2 to substrate mass ratio of 0.05: 1. It is shown that the use of a tubular reactor with smaller inner diameter can provide high reaction conversions in short residence times, thus offering a promising route for the investigation of biodiesel production.
引用
收藏
页码:5165 / 5172
页数:8
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