Banca de QUALIFICAÇÃO: ALYXANDRA CARLA DE MEDEIROS BATISTA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : ALYXANDRA CARLA DE MEDEIROS BATISTA
DATE: 25/11/2019
TIME: 09:30
LOCAL: Auditório do IQ3
TITLE:

Study of thermal and thermocatalytic conversion of microalgae biomass to obtain renewable biofuels using microporous catalyst

KEY WORDS:

Desmodesmus sp, HBeta 38, Kinetic Study, Thermal and thermocatalytic conversion, Thermal Study

PAGES: 121
BIG AREA: Engenharias
AREA: Engenharia Química
SUMMARY:

The continued unbridled use of petroleum fuels is widely recognized as unsustainable. In addition, the concerns associated not only with increased consumption and dependence on oil products, but also mainly with environmental problems make it necessary to search for new, cleaner and more sustainable energy sources. Because of this, the production of clean, renewable and carbon neutral fuels is necessary for environmental sustainability. Thus, the present work aims to study the application of thermal and thermocatalytic conversion of Desmodesmus sp microalgae biomass to obtain renewable biofuels using as catalyst HBeta 38 zeolite. The catalyst was chacterize by several characterization techniques, which were: Thermogravimetric Analysis (TGA / DTG), X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Dispersive Energy Spectroscopy (EDS), X-ray Fluorescence Spectroscopy (FRX), Nitrogen Adsorption and Desorption and Fourier Transform Infrared Spectroscopy (FTIR). Microalgae biomass was characterized by the following techniques: Elemental Analysis (CHN), TGA / DTG, FTIR, SEM and EDS. All results of catalyst and biomass characterization were satisfactory, as well as the kinetic study from thermogravimetric data (TGA / DTG) of pure microalgae biomass and in the presence of catalyst. The samples of pure biomass and biomass in the presence of the catalyst presented R² values above 0.9, for the conversion of 5 to 80% of the process, showing a satisfactory behavior of the applied kinetic models. The microalgae biomass in the presence of the catalyst presented the lowest activation energy range of 146 to 164kJ/mol for the OFW method and 320 to 361kJ/mol for the KAS method in the range of 5 to 10% conversion, can be considered as a promising raw material for the pyrolysis process.

BANKING MEMBERS:
Presidente - 2140818 - AMANDA DUARTE GONDIM
Interno - 350509 - ANTONIO SOUZA DE ARAUJO
Externa ao Programa - 2011255 - ARUZZA MABEL DE MORAIS ARAUJO
Externo ao Programa - 348087 - GRACO AURELIO CAMARA DE MELO VIANA
Externa à Instituição - REGINEIDE DE OLIVEIRA LIMA - UFRN