Banca de DEFESA: GABRIEL GOMES LEAL

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : GABRIEL GOMES LEAL
DATE: 22/03/2024
TIME: 14:00
LOCAL: Sala virtual https://meet.google.com/fcs-mnxi-rzi
TITLE:

H-BEA TYPE CATALYSTS APPLIED TO GLYCEROLYSIS OF FATTY ACIDS IN THE PRESENCE OF CRUDE GLYCERIN: AN ALTERNATIVE FOR PRE-TREATING ACID RAW MATERIALS FOR BIODIESEL PRODUCTION

KEY WORDS:

Glycerin, Glycerolysis, Beta Zeolites, Fatty Acids.

PAGES: 70
BIG AREA: Ciências Exatas e da Terra
AREA: Química
SUBÁREA: Físico-Química
SPECIALTY: Cinética Química e Catálise
SUMMARY:

The global energy scenario is dominated by oil and other fossil fuels from limited sources that generate environmental impacts associated with climate change. In this context, biodiesel grows as a renewable and sustainable alternative energy source with properties very similar to petroleum diesel. In the global biodiesel production process, oleaginous raw materials are widely used in the transesterification reaction, producing alkyl esters and large volumes of glycerin as a co-product of the reaction. The search for alternative raw materials is interesting due to the high price of oilseed sources. However, the biggest challenge encountered is the presence of high levels of free fatty acids. Glycerolysis is an esterification reaction in the presence of crude glycerin at high temperatures that can be applied as a pre-treatment step for acidic raw materials. Heterogeneous catalysis appears as a solution to make glycerolysis viable and improve its performance at temperatures below 220 ºC. Among the heterogeneous catalysts, we have zeolites, whose composition, structure and porosity generate interest in their applications in the glycerolysis of fatty acids. In this work, Nickel and Molybdenum were impregnated in beta zeolites, and their performance was evaluated in the glycerolysis reaction of fatty acids under different reaction conditions. The Mo/H-BEA catalyst presented the highest conversion rates among the catalysts evaluated. The best reaction conditions observed were at 120 ºC, oil: glycerin molar ratio 1:2 and 1.0% by catalyst mass. It was observed that the presence of impurities in crude glycerin, such as water, MONG and inorganic salts, affects the reaction.

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Interno - 1673526 - MARCOS MALTA DOS SANTOS
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