Banca de QUALIFICAÇÃO: ISABELA OLIVEIRA COSTA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : ISABELA OLIVEIRA COSTA
DATE: 01/11/2023
TIME: 10:00
LOCAL: Via google meet (link https://meet.google.com/yfp-wswr-yhh)
TITLE:

BIODIESEL PRODUCTION VIA TRANSESTERIFICATION OF WASTE OIL USING MULTIENZYMATIC SYSTEMS WITH LIPASES IMMOBILIZED ON COCONUT FIBER

KEY WORDS:

Biodiesel, Lipases, Immobilization, Green coconut fiber, Residual oil.

PAGES: 54
BIG AREA: Engenharias
AREA: Engenharia Química
SUBÁREA: Processos Industriais de Engenharia Química
SPECIALTY: Processos Bioquímicos
SUMMARY:

The growing demand for renewable energy sources is mainly driven by energy and environmental challenges. An excellent alternative that does not depend on fossil raw materials is biodiesel. The most common method for producing biodiesel involves the transesterification reaction of vegetable oils or animal fats with primary alcohols, such as methanol or ethanol, in the presence of a catalyst. This transesterification can be carried out using a variety of raw materials. There is a growing interest in the use of waste oils and fats due to the economic advantages and environmental impact that can be caused by inappropriate disposal of these materials. Furthermore, another advance in terms of sustainability is to promote the transition from chemical catalysis to biocatalysis. Enzymes are obtained from easily accessible renewable sources, are biodegradable and, fundamentally, harmless and innocuous. Lipases are the most used biocatalysts in biodiesel synthesis. Enzyme immobilization is a useful methodology to modulate enzyme characteristics such as activity, selectivity and stability. Based on this, the purpose of this master's thesis proposal is to synthesize a biodiesel with minimal carbon emissions. To achieve this, residual frying oil will be used as raw material and the reaction will be catalyzed by lipases immobilized on coconut fiber, which is a residual lignocellulosic material. For catalysis, the use of three lipases will be proposed (Candida antarctica type B lipase (CALB), Pseudomonas fluorescens lipase (PFL) and Eversa lipase), aiming to benefit from the different specificities of each lipase to achieve the highest yield. of biodiesel. The biocatalysts produced will be characterized using immobilization parameters, thermal stability, desorption, electrophoresis and Fourier transform spectroscopy (FTIR). From this characterization it will be possible to produce multienzyme systems (mixture of individually immobilized lipases and co-immobilized lipases). All biocatalysts will be tested for efficiency in the synthesis of biodiesel, which will be analyzed using gas chromatography

COMMITTEE MEMBERS:
Presidente - 3214434 - NATHALIA SARAIVA RIOS
Interno - 1346198 - EVERALDO SILVINO DOS SANTOS
Externa à Instituição - LUCIANA ROCHA BARROS GONÇALVES - UFC