Banca de DEFESA: EDUARDO ZANITTI ÁVILA COUTO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : EDUARDO ZANITTI ÁVILA COUTO
DATE: 05/03/2022
TIME: 10:00
LOCAL: https://meet.google.com/eju-kzew-pmu
TITLE:

COMBUSTION OF ACRYLONITRILE ON CATALYSTS (Cu or Ce)-OXIDE and (CuO or CeO2)-BETA

KEY WORDS:

combustion; acrylonitrile; catalyst; Beta zeolite; CeO2.

PAGES: 49
BIG AREA: Engenharias
AREA: Engenharia Química
SUBÁREA: Operações Industriais e Equipamentos para Engenharia Química
SPECIALTY: Reatores Químicos
SUMMARY:

The emission of acrylonitrile resulting from its production generates serious environmental problems and consequently to human health. Selective catalytic oxidation has been shown to be a relevant method for solving this problem, being more efficient than conventional combustion. This method consists of the use of catalysts capable of reducing the activation energy of the reaction and selecting the desired product, minimizing as much damage as possible to the damage caused in the process. In this work, CuO, CeO2, CuO-BETA catalysts were used in the selective catalytic oxidation of acrylonitrile in order to decrease the operating temperature (<800ºC) and preferably produce N2, mitigating environmental damage. The mass catalysts of CuO and CeO2 were obtained commercially while the supported CuO-BETA was prepared by the incipient impregnation method. Subsequently, the four catalysts were characterized by XRD, TPR-H2 and UV-Vis spectroscopy. XRD results showed characteristic peaks of copper oxides (CuO) and cerium (CeO2) in the mass and supported catalysts. The addition of these oxides to the support by the incipient impregnation method did not alter the morphology of zeolite-BETA. TPR-H2 profiles indicated that the copper oxide supported in beta zeolite led to a decrease in the temperature of reduction of copper species. UV-Vis spectroscopy analyses identified the presence of Cu2+ions, [Cu-O-Cu]2+ and Ce4+, as well as CuO nanoparticles in the CuO-BETA catalyst. The catalytic assays showed that the catalysts present good activity for the selective oxidation of acrylonitrile, causing a significant decrease in reaction temperature, ceo2 being the most promising among them for presenting lower reaction temperature and higher selectivity for N2 and CO2 formation.

BANKING MEMBERS:
Presidente - 1435340 - MARCELO DA SILVA BATISTA
Interno - 1759475 - JORGE DAVID ALGUIAR BELLIDO
Externo à Instituição - ANDRÉ GUSTAVO SATO - UFV