Banca de DEFESA: JOÃO LEONARDO FREITAS OLIVEIRA

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
DISCENTE : JOÃO LEONARDO FREITAS OLIVEIRA
DATA : 02/07/2019
HORA: 09:00
LOCAL: auditório do Química III
TÍTULO:

KINETICS AND PYROLYSIS OF LICURI OIL (Syagrus coronata) USING SODIUM / ACID VERMICULITE WITH ZINC OXIDE TO OBTAIN BIO-OIL

PALAVRAS-CHAVES:

Pyrolysis, kinetic study, deoxygenation, bio-oil, vermiculite and zinc oxide.

PÁGINAS: 90
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Química
SUBÁREA: Físico-Química
ESPECIALIDADE: Cinética Química e Catálise
RESUMO:

The application of clays has become more common in several areas of research in the last decades, thanks to its unique properties, be it in its pure form or modified physically / chemically. In this work, the natural and acidic vermiculite were used as catalysts and catalytic support for zinc oxide, in order to obtain promising catalysts for application in the pyrolysis of oleaginous plant origin known as licuri (Syagrus coronata). In all, five catalysts were synthesized, zinc oxide (ZnO), vermiculite supported with zinc oxide in the mass percentages of 1 and 6% (VZn1 and VZn6), vermiculite (V) and acid vermiculite with 1% and 6% of zinc oxide, VaZn1 and VaZn6, respectively. The catalysts under study were characterized by the following techniques: X-ray diffractometry (XRD), thermogravimetric analysis (TGA), nitrogen adsorption / desorption, scanning electron microscopy (SEM) and X-ray fluorescence (FRX). The pyrolysis tests for the determination of activation energy were performed on a thermogravimetric scale following Kissinger-Akahira-Sunose (KAS) and Ozawa Flynn-Wall (OFW) kinetic models. Rapid pyrolysis was performed using a Py-CG / MS for separation and determination of the bio-oil composition. In the kinetic study of the pyrolysis of the liqueur oil, the catalysts that showed the highest catalytic activity were V, VZn1 and VaZn1, presenting activation energy lower than the thermal pyrolysis of the oil from the 10% conversion. VZn1 and VaZn1 presented higher activity for the formation of hydrocarbons by deoxygenation of the oil, showing that the zinc oxide associated with vermiculite presents as an alternative option there are conventional catalysts for studies in the area of pyrolysis and production of bio- oil.

MEMBROS DA BANCA:
Presidente - 2140818 - AMANDA DUARTE GONDIM
Externa ao Programa - 2011255 - ARUZZA MABEL DE MORAIS ARAUJO
Interno - 348475 - DJALMA RIBEIRO DA SILVA
Externa à Instituição - EDJANE FABIULA BURITI DA SILVA - Estácio
Externa à Instituição - MEIRY GLÁUCIA FREIRE RODRIGUES - UFCG