Biodiesel production by direct conversion of Botryococcus braunii lipids: Reaction kinetics modelling and optimization

被引:21
作者
Hidalgo, Pamela [1 ]
Ciudad, Gustavo [1 ,2 ]
Mittelbach, Martin [3 ]
Navia, Rodrigo [1 ,2 ,4 ]
机构
[1] Univ La Frontera, Sci & Technol Bioresources Nucleus, Temuco, Chile
[2] Univ La Frontera, Dept Chem Engn, Temuco, Chile
[3] Graz Univ, Inst Chem, Working Grp Chem & Technol Renewable Resources, A-8010 Graz, Austria
[4] Univ La Frontera, Ctr Biotechnol & Bioengn CeBiB, Temuco, Chile
关键词
In situ transesterification; Microalgae; Reaction kinetics; B; braunii; IN-SITU TRANSESTERIFICATION; FREE FATTY-ACIDS; CATALYZED TRANSESTERIFICATION; MICROALGAL BIOMASS; SOYBEAN OIL; EXTRACTION; ESTERIFICATION; COSOLVENT; METHANOL; SOLVENT;
D O I
10.1016/j.fuel.2015.03.039
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
Biodiesel production by in situ esterification/transesterification of Botryococcus braunii microalgae biomass was studied in this work. The effect of different experimental parameters including moisture content, catalyst dosage and methanol to co-solvent ratio (v/v) were evaluated in the proposed reaction process. The selected experimental parameters were found to be significant for the in situ reaction process. A theoretical maximum fatty acid methyl esters (FAME) yield of 80.1% was reached using microalgal biomass with a 28.5% moisture content, a catalyst dosage of 148.7 wt%. with respect to total fatty acid content and a methanol:petroleum ether ratio 2.9:1 v/v. The obtained results show that the reaction took place using wet biomass with moisture content up to 30%, due to the high solvent content provoking water dilution in the reaction medium. For reaction kinetics modelling, the experimental data were fit to a simultaneous esterification and transesterification model. The esterification model was used due to the high free fatty acids (FFA) content and suitably represented the experimental data; however transesterification reaction also took place. Thus, a model considering simultaneous esterification and transesterification on overall FAME production rate was proposed. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码:544 / 551
页数:8
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