Banca de QUALIFICAÇÃO: CAIO VITOR CARVALHO DE SOUZA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : CAIO VITOR CARVALHO DE SOUZA
DATE: 17/12/2021
TIME: 15:00
LOCAL: VIDEOCONFERÊNCIA
TITLE:

THERMOCATALYTIC DEGRADATION OF POLYPROPYLENE RESIDUE USING MESO-MACROPOROUS BIMODAL SILICA AND H-Y ZEOLITE COMMERCIAL CATALYST.

KEY WORDS:

 Thermocatalytic degradation; Zeolite H-Y; Meso-macroporous silica; Polypropylene; Activation Energy.

PAGES: 106
BIG AREA: Ciências Exatas e da Terra
AREA: Química
SUBÁREA: Físico-Química
SPECIALTY: Cinética Química e Catálise
SUMMARY:

Polymeric materials, especially plastic materials, due to their characteristics and properties, are widely used in the most diverse industrial sectors. The 20th century saw an exponential increase not only in production, but in the most diverse applications, from decoration tools to the automobile industry and medical hospitals. However, the excessive use of these materials, especially articles with a short lifespan, that is, those that are quickly discarded, has entailed a major problem, their inadequate disposal. Among the forms of disposal of these materials, none of them has the objective of recovering the energy content of this material, among the processes for adapting these plastic wastes, the only sustainable solution is the chemical recycling of this type of waste. Thermal or thermocatalytic degradation presents itself as a route for this purpose, with the possibility of transforming a residue into products with high added value in the fuel fraction, for example. For this purpose, the use of catalysts is necessary to improve processes, reducing their activation energy, reaction temperature and providing, from the catalyst used, routes for preferential products. Currently, zeolites are widely studied and used in various processes, especially in the petrochemical industry, but these materials have low transport rates of bulky molecules due to the small size of the micropores, so new studies are being carried out to synthesize new materials hierarchical, that is, with pore size greater than that of nanometric zeolites in order to reduce steric limitations for the conversion of bulky molecules. Thus, the bimodal catalyst, with pore size in the meso and macro order, previously synthesized was studied for polypropylene waste degradation and its catalytic activity was compared with commercial zeolite HY from the mass transformation of PP waste loads in a vessel reactor open and on a thermoanalytical balance. From the calculations of the kinetic parameters as well as the activation energy were performed using the Arrhenius equation and the Ozawa-Flynn-Wall method for isothermal and non-isothermal processes respectively. Thus, it was possible to evaluate the catalytic activity of the materials proposed for this work.

BANKING MEMBERS:
Interna - 2140818 - AMANDA DUARTE GONDIM
Interno - 350509 - ANTONIO SOUZA DE ARAUJO
Externa à Instituição - ARUZZA MABEL DE MORAIS ARAUJO - UFRN