Coating and incorporation of iron oxides into a magnetic-polymer composite to be used as lipase support for ester syntheses

Autor(es)

Mijone, Patricia D. ^[1] ; Vilas Boas, Renata N. ^[1] ; Bento, Heitor B. S. ^[1] ; Rodrigues Reis, Cristiano E. ^[1] ; de Castro, Heizir F. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Biocatalysis Lab, Dept Chem Engn, Engn Sch Lorena, Estr Municipal Campinho S-N, BR-12602810 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: RENEWABLE ENERGY; v. 149, p. 1167-1173, APR 2020.
• Citações Web of Science: 0

Resumo

The utilization of novel materials within the scope of biofuel synthesis has been represented as a significant step in the development of remarkable catalysts. The use of lipases in biodiesel production is often found as a cost-limiting step, as the operational expenditures in recovering such catalysts may lead to unfeasible market expectations. Herein, magnetic-polymer composites were evaluated as supports to immobilize commercial lipase, following the application in ethyl ester syntheses. A matrix of polysiloxane-polyvinyl alcohol (SiO2-PVA) was selected as the polymeric structure, following Fe3O4 and gamma Fe2O3 coating and incorporation assays to the support backbone. Characterization of the produced catalyst support materials was performed via analysis of X-ray powder diffraction, pore size, Scanning electron microscopy, Fourier transform infrared spectroscopy, and vibrating sample magnetometry. Burkholderia cepacia was then immobilized on the matrices, following transesterification of coconut oil with ethanol. The biodiesel samples generated were all within commercial standards, achieving conversion ester contents higher than 96.5%. The purified product samples (biodiesel) were essentially odorless and translucent appearance. Other properties such as density (873-876 kg m(-3)) and viscosity (3.76-3.93 mm(2) s(-1)) meet the specifications required by the ASTM to be used as a biofuel. (C) 2019 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 16/10636-8 - Da fábrica celular à biorrefinaria integrada Biodiesel-Bioetanol: uma abordagem sistêmica aplicada a problemas complexos em micro e macroescalas
• Beneficiário: Roberto de Campos Giordano
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOEN - Temático