Banca de DEFESA: THALITA MARREIRO DELMIRO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : THALITA MARREIRO DELMIRO
DATE: 22/06/2020
TIME: 15:00
LOCAL: ONLINE
TITLE:

Potential of Monoraphidium sp. produced in outdoor crops to obtain third generation biofuels

KEY WORDS:

Microalgae, Monoraphidium sp., Lipids, 3G biofuels, catalytic flash pyrolysis, HZSM-5.

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

Microalgae are promising biomasses for obtaining third generation (3G) biofuels, because in addition to accumulating large amounts of lipids that can be converted into biodiesel from transesterification, their residual biomass can be used in other conversion processes. In addition, they have rapid growth, do not compete with food sources, and can be grown on a large scale in outdoor cultivation systems. Therefore, 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 cultivations, through the characterization of the lipid extract and its conversion through the pyrolysis process. For this, the biomasses were characterized in terms of dry matter, ash, protein, lipids and carbohydrates content and also through thermogravimetric analysis (TGA / DTG), spectroscopy in the middle and near infrared (FT-IR) region (FT-NIR ). The ash characterization was carried out through 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) and gas chromatography coupled to a mass spectrometer (GC-MS). The preliminary characterization results reveal biomasses with high protein content (20.05 - 34.81%), carbohydrates (25.01% -54.46%) and ash (13.02 - 33.29%). In relation to TL, the results varied between 8 - 22%. The lipid extracts have a fatty acid profile rich in C16: 0, C16: 4 ω-3, C18: 2 ω-6, C18: 3 ω-3 and C18: 4 ω-3, and the presence of triglycerides and fatty acids determined by thin layer chromatography (TLC). Catalytic flash pyrolysis (Py-GC / MS) of biomass was also performed before and after extraction, and of lipid extract, using zeolite HZSM-5 as a catalyst, which provided an improvement in the characteristics of the products generated in relation to conventional pyrolysis. , promoting the increase in the formation of renewable aromatic hydrocarbons in the three cases. For the lipid extract the formation of 16, 38% of alkanes in the range of C8 to C12, indicates its capacity for the generation of renewable hydrocarbons such as biogasoline and aviation biokerosene (BioQAV). It is concluded with these results that Monoraphidium sp. presents energy potential for the production of 3G biofuels, either through the conversion of oil into biodiesel or the production of renewable fuels from catalytic pyrolysis.

BANKING MEMBERS:
Interno - 1584174 - DOMINGOS FABIANO DE SANTANA SOUZA
Interno - 6347420 - MARCUS ANTONIO DE FREITAS MELO
Presidente - 1979301 - RENATA MARTINS BRAGA
Externo à Instituição - RODRIGO CÉSAR SANTIAGO - UFERSA