Banca de QUALIFICAÇÃO: THALITA MARREIRO DELMIRO

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : THALITA MARREIRO DELMIRO
DATE: 17/02/2020
TIME: 14:30
LOCAL: Auditório do Nupprar
TITLE:

Potential evaluation of Monoraphidium sp. for the production of 3G biofuels.

KEY WORDS:

Microalgae, Monoraphidium sp., Lipids, 3G biofuels, Catalytic flash pyrolysis.

PAGES: 69
BIG AREA: Engenharias
AREA: Engenharia Química
SUMMARY:

Microalgae are biomass promising for obtaining of third generation biofuels because they are able to accumulate substantial amounts of lipids in their cells that can be converted to biofuels using processes such as transesterification, esterification and thermal cracking. The main advantages of using microalgae compared to other biomasses is the fact that their crops have high productivity, do not require on arable land, do not compete with food sources, and are carbon neutral because they have great capabilities of CO₂ biofixing. Given this perspective, the present work aims to evaluate the potential for the generation of 3G biofuels from microalgae of the species Monoraphidium sp., Obtained from intensive outdoor crops, through the characterization of the lipid extract and its conversion through the flash pyrolysis process. For this, the biomass were characterized in terms of dry matter, ash, proteins and lipids. Analyzes of thermogravimetry (TGA / DTG), spectroscopy in the middle infrared (FT-IR) and near (FT-NIR) regions, and analytical pyrolysis (Py-GC / MS) were also carried out to characterize lyophilized biomass, aiming at applications for the rapid estimation of lipid content (TL). The ash was characterized by X-ray fluorescence (FRX) and X-ray diffraction (DRX). The lipid extract, obtained by the Schmid-Bondzynski-Ratzlaff method, was evaluated by thin layer chromatography (CCD), gas chromatography coupled to a mass spectrometer (GC-MS) and by Py-GC / MS. Preliminary results of the characterization show biomass that have high protein content (20.05 - 34.81%) and ashes (13.02 - 33.29%). As for TL, the results varied between 8 - 21%. The lipid extracts present a fatty acid profile rich in C16: 0, C16: 4, C18: 2, C18: 3 and C18: 4, and the presence of triglycerides and free fatty acids determined by thin layer chromatography (TCL).  Catalytic flash pyrolysis (PY-GC / MS) of biomass was also carried out before and after extraction, as well as oil, using zeolite HZSM-5 as a catalyst, which provided the improvement of the characteristics of the products generated in relation to conventional pyrolysis. , promoting an increase in the formation of lighter aromatic and aliphatic hydrocarbons, within the aviation biokerosene range. It is concluded, therefore, with these results that Monoraphidium sp. presents great energy potential for the production of 3G biofuels, either through the conversion of oil into biodiesel or the production of aviation biokerosene from catalytic pyrolysis. Its high protein content also points to its potential for animal nutrition.

BANKING MEMBERS:
Interno - 1584174 - DOMINGOS FABIANO DE SANTANA SOUZA
Externo ao Programa - 348087 - GRACO AURELIO CAMARA DE MELO VIANA
Interno - 6347420 - MARCUS ANTONIO DE FREITAS MELO
Presidente - 1979301 - RENATA MARTINS BRAGA