| Full text | |
| Author(s): |
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.
Total Authors: 8
|
| Document type: | Journal article |
| Source: | ENERGIES; v. 15, n. 4, p. 12-pg., 2022-02-01. |
| Abstract | |
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) | |
| FAPESP's process: | 16/10636-8 - From the cell factory to the Biodiesel-Bioethanol integrated biorefinery: a systems approach applied to complex problems in micro and macroscales |
| Grantee: | Roberto de Campos Giordano |
| Support Opportunities: | Program for Research on Bioenergy (BIOEN) - Thematic Grants |
| FAPESP's process: | 16/18909-3 - Evaluation of the technological potential of microalgae aiming its application in the energy, food, cosmetic and pharmaceutical sectors |
| Grantee: | Patricia Caroline Molgero da Rós |
| Support Opportunities: | Program for Research on Bioenergy (BIOEN) - Regular Program Grants |
| FAPESP's process: | 18/01386-3 - Artificial lichens and the integration of products with high added value to a biorefinery |
| Grantee: | Savienne Maria Fiorentini Elerbrock Zorn |
| Support Opportunities: | Scholarships in Brazil - Doctorate |
| FAPESP's process: | 20/15513-7 - Scale up of L-asparaginase production employing genetically modified microorganism |
| Grantee: | Heitor Buzetti Simões Bento |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |