| Texto completo | |
| Autor(es): |
Zorn, Savienne M. F. E.
;
da Silva, Ana Paula T.
;
Bredda, Eduardo H.
;
Bento, Heitor B. S.
;
Pedro, Guilherme A.
;
Carvalho, Ana Karine F.
;
Silva, Messias Borges
;
Da Ros, Patricia C. M.
Número total de Autores: 8
|
| Tipo de documento: | Artigo Científico |
| Fonte: | ENERGIES; v. 15, n. 4, p. 12-pg., 2022-02-01. |
| Resumo | |
Lubricants are substances of the foremost importance in the modern world, as they are essential to the proper functioning of various mechanisms. Most lubricants, however, are still made from petroleum fractions. I light of this, and due to various environmental problems, the search for feasible biolubricants has become essential. This study obtained biolubricants through the in situ transesterification of microbial biomass, containing at least 20 wt% of lipids. The following two distinct biomasses were evaluated: the marine microalgae, Dunaliella salina, and the consortium of microalgae-fungi, Scenedesmus obliquus and Mucor circinelloides. Microbial oil from both biomasses presented a fatty acid profile with high amounts of oleic acid. The oil of D. salina had a lower content of polyunsaturated fatty acids relative to the microbial consortium profile, which indicates that this is a good configuration for increasing biolubricant oxidation resistance. The catalyst used was a Keggin-structure heteropolyacid supported on niobium, H3PMo12O40/Nb2O5, activated at 150 degrees C, which had high transesterification yields, notwithstanding the feedstocks, which were rich in free fatty acids. The performed transesterification reactions resulted in excellent yields, up to 97.58% and 96.80%, for marine microalgae and the consortium, respectively, after 6 hat 250 degrees C, with 10 wt% of catalyst (related to the lipid amount). As such, the (H3PMo12O40/Nb2O5) catalyst could become an attractive option for producing biolubricants from microbial biomass. (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 |
| Processo FAPESP: | 16/18909-3 - Avaliação do potencial tecnológico de microalgas visando sua aplicação nos setores energético, alimentício, cosmético e farmacêutico |
| Beneficiário: | Patricia Caroline Molgero da Rós |
| Modalidade de apoio: | Auxílio à Pesquisa - Programa BIOEN - Regular |
| Processo FAPESP: | 18/01386-3 - Liquens artificiais e a integração de produtos de alto valor agregado a uma biorrefinaria |
| Beneficiário: | Savienne Maria Fiorentini Elerbrock Zorn |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |
| Processo FAPESP: | 20/15513-7 - Scale up da produção de L-asparaginase empregando microrganismo geneticamente modificado |
| Beneficiário: | Heitor Buzetti Simões Bento |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |