Two-step enzymatic production of environmentally friendly biolubricants using castor oil: Enzyme selection and product characterization

被引：55

作者：

Greco-Duarte, J. ^{[1
]}

Cavalcanti-Oliveira, E. D. ^{[1
]}

Da Silva, J. A. C. ^{[2
]}

Fernandez-Lafuente, R. ^{[3
]}

Freire, D. M. G. ^{[1
]}

机构：

[1] Univ Fed Rio de Janeiro, Inst Chem, Dept Biochem, Ctr Technol, Cidade Univ,Bl A,Sl 549, BR-21949900 Rio De Janeiro, RJ, Brazil

[2] Petrobras SA, Ctr Pesquisas & Desenvolvimento Leopoldo Amer Mig, Cenpes, BR-21941970 Rio De Janeiro, Brazil

[3] ICP CSIC, Dept Biocatalisis, C Marie Curie 2,Campus UAM CSIC, Madrid 28049, Spain

来源：

FUEL | 2017年 / 202卷

关键词：

Biolubricant; Estolide; Castor oil; Ricinoleic acid; Candida rugosa lipase; KINETICALLY CONTROLLED SYNTHESIS; BETA-LACTAM ANTIBIOTICS; RICINUS-COMMUNIS L; VEGETABLE-OILS; OLEIC-ACID; HYDROLYSIS; LIPASE; TRANSESTERIFICATION; ESTERIFICATION; PURIFICATION;

D O I：

10.1016/j.fuel.2017.04.036

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：

We performed two-step enzymatic biolubricant production: castor oil hydrolysis and esterification of castor oil free fatty acids (COFFA) rich in ricinoleic acid. The hydrolysis step utilized castor seeds as catalyst yielding 93.13 +/- 5.9% COFFA in only 1 h. In the esterification step, C. rugosa lipase (CRL) decreased the acidity by over 80% after 96 h, utilizing as polyols neopenthylglicol (NPG), trimethylolpropane (TMP) and pentaerytritol (PE) and showed about 70% acidity decrease without polyols, indicating the production of COFFA polymers (estolides). Nuclear magnetic resonance (NMR) confirmed estolides as the main product, reaching a polymerization degree of 6/7 without polyols, 4 in the presence of PE and ricinoleic acid dimers in the presence of NPG and TMP. Analyses of biolubricant properties showed that the best product was the estolide with a polymerization degree of 6/7: viscosity index of 162, oxidation stability of 51 min and pour point of -42 degrees C. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：196 / 205

页数：10