Enzymatic synthesis of neopentyl glycol-bases biolubricants using biodiesel from soybean and castor bean as raw materials

Érika C.G. Aguieiras, Elisa D.C. Cavalcanti, Priscila R. da Silva, Valéria F. Soares, Roberto Fernandez-Lafuente, Charles Lima Bessa Assunção, José André C. da Silva and Denise M.G. Freire

Renewable Energy, 2020, vol. 148, issue C, 689-696

Abstract: Synthetic oleochemical esters represents a growing alternative for mineral oil-based lubricants. In this sense, the present study shows the results of enzymatic synthesis of neopentyl glycol-bases biolubricants using biodiesel from soybean and castor bean as raw materials. The potential of two commercial immobilized lipases, lipase B from Candida antarctica (Novozyme 435) and lipase from Rhizomucor miehei (Lipozyme RM IM), to produce NPG esters in a solvent-free medium was evaluated. High conversions (>95%) were obtained for both raw materials, with both enzymes, but in a shorter reaction time for soybean biodiesel (24 h) than castor biodiesel (48 h). Both enzymes could be successfully reused for six reactions, Novozyme 435 maintained ≥70% of the initial conversion using the two raw materials and Lipozyme RM IM maintained ≥90% of the first reaction conversion using castor biodiesel. The soybean NPG esters showed good viscosity index, higher than 198, and the castor NPG esters showed good pour point, lower than −20 °C, and good oxidative stability, higher than 30 min. The physico-chemical properties of the biolubricants were dependent on the biodiesel source which directly influence the final application of the products.

Keywords: Biolubricant; Polyol ester; Neopentyl glycol; Biodiesel; Lipase (search for similar items in EconPapers)
Date: 2020
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Citations: View citations in EconPapers (4)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:148:y:2020:i:c:p:689-696

DOI: 10.1016/j.renene.2019.10.156

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