Banca de DEFESA: CARLOS AUGUSTO CABRAL KRAMER

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : CARLOS AUGUSTO CABRAL KRAMER
DATA : 09/03/2017
HORA: 10:00
LOCAL: Sala 3F1
TÍTULO:

CELL WALL OXIDATION OF MICROALGA CHLAMYDOMONAS SP. FOR THE LIPIDS EXTRACTION AND THE ASSESSMENT OF THEIR QUALITY FOR BIODIESEL SYNTHESIS

PALAVRAS-CHAVES:

CELL WALL OXIDATION. BIODIESEL FROM MICROALGAE. QUALITY PARAMETERS

PÁGINAS: 71
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Química
SUBÁREA: Química Orgânica
ESPECIALIDADE: Química dos Produtos Naturais
RESUMO:

The production of microalgae for energy purposes has become an alternative route to the oil industry by offering renewable biofuels such as bioethanol, bio-oil and biodiesel. The biodiesel is produced by transesterification of the lipid material and in general cases microalgae produce lipids naturally. However, one of the great difficulties in the production of microalgae biodiesel on a large scale is the lack of efficient methods and inexpensive for lipid extraction. Thus, this paper studied the cell wall oxidation efficiency of microalgae of the genus Chlamydomonas sp. with hydrogen peroxide (H2O2) in the extraction of lipids, also assessing the impact on the quality of the extracted lipids. The increase H2O2 concentration promotes an increase of 60% in lipid yield, indicative of facilitating the disruption of the cell wall, which was proved by thermogravimetric profile of residual biomass and the change of the cell by optical microscopy. However, it was noted the quality parameters decreases after application of the method, generating higher acid numbers and organic peroxides, besides a decrease in iodine content. However, the spectroscopic profile in the infrared region of the lipid extracted material with and without oxidizing action are almost identical, indicating that the decrease of the quality parameters does not significantly affect the major functional groups belonging extracts. The lipid material obtained after use of the oxidative method was completely transesterified, that is, converted into biodiesel, reaching conversions above 96% proven by gas chromatography analysis.

MEMBROS DA BANCA:
Presidente - 1530500 - ANA CRISTINA FACUNDO DE BRITO PONTES
Interno - 2087667 - TIAGO PINHEIRO BRAGA
Externo ao Programa - 433663 - MARTA COSTA
Externo à Instituição - NORBERTO DE KASSIO VIEIRA MONTEIRO - UERN