Banca de DEFESA: SAMILE RAIZA CARVALHO MATOS

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : SAMILE RAIZA CARVALHO MATOS
DATE: 17/03/2023
TIME: 14:00
LOCAL: Sala virtual de defesa do PPEC
TITLE:

Co-processing of spent catalyst in the production of clinkers for special Class G cement and cement containing Ye´elimita

KEY WORDS:

Clinker; spent catalyst; special cement.

PAGES: 228
BIG AREA: Engenharias
AREA: Engenharia Civil
SUBÁREA: Construção Civil
SPECIALTY: Materiais e Componentes de Construção
SUMMARY:

The fluidized-bed catalytic cracking process is one of the most used in the world for petroleum refining, having as its main residues the spent catalyst (SFCC). This waste is potentially dangerous because it contains toxic elements, such as vanadium and lanthanum. Its global generation is estimated to be around hundreds of tons per year and a large part is destined for industrial landfills. Given the projected growth of this sector, it is necessary to search for an efficient environmental solution for the destination of this waste. An alternative is co-processing in the cement industry due to the high demand for raw material and the high temperatures of the clinkerization process, which can contribute to the fixation and immobilization of contaminating elements in the sintered phases. Therefore, this paper aims to propose the co-processing of SFCC in the production of Portland Class G clinker, as it is used by the oil industry itself, thus focusing on the precepts of the circular economy. As an alternative to increase the incorporation of SFCC and to reduce the energy demand of the process, YCC cement was also produced. The dosage and production of these cements were carried out in the laboratory, and the clinkers will be evaluated by physical, chemical, and mineralogical analyses. In addition, the rheological and hydration study of the pastes will be carried out using the techniques of isothermal calorimetry, in situ XRD, XRD, and TG at 3 and 28 days. Finally, to analyze the environmental viability of cement, a life cycle assessment (LCA) and an environmental risk study of the pastes before and after degradation by supercritical carbonation will be carried out. From the preliminary results, it was possible to note that the presence of SFCC has an influence on the phases formed and on the hydration reactions of both Class G and YCC cement.

COMMITTEE MEMBERS:
Presidente - 2652701 - JARDEL PEREIRA GONCALVES
Interna - ***.974.825-** - HELOYSA MARTINS CARVALHO ANDRADE - UFBA
Externo ao Programa - 2362069 - RAILDO ALVES FIUZA JUNIOR - UFBAExterna ao Programa - 1677204 - ELAINE CHRISTINE DE MAGALHAES CABRAL ALBUQUERQUE - UFBAExterno à Instituição - NOME COMPLETO GUILHERME CHAGAS CORDEIRO - UENF
Externa à Instituição - ANA PAULA KIRCHHEIM - UFRGS
Externo à Instituição - RICARDO ANDRÉ FIOROTTI PEIXOTO - UFOP