Banca de DEFESA: REBECCA ARAÚJO BARROS DO NASCIMENTO SANTIAGO
Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.STUDENT : REBECCA ARAÚJO BARROS DO NASCIMENTO SANTIAGO
DATE: 14/11/2023
TIME: 09:30
LOCAL: Auditório do CCET
TITLE:
EVALUATION OF IRON-BASED INDUSTRIAL ORES AND WASTE AS CARRIERS OF OXYGEN AND THE ENERGY POTENTIAL OF COLORED COTTON WASTE FOR THE BIOMASS CHEMICAL LOOPING GASIFICATION PROCESS – BCLG
KEY WORDS:
CO2 Capture; BCLG; Oxygen Carriers; Iron Ore; Industrial Waste
PAGES: 140
BIG AREA: Engenharias
AREA: Engenharia de Materiais e Metalúrgica
SUBÁREA: Materiais Não-Metálicos
SPECIALTY: Cerâmicos
SUMMARY:
The reduction of anthropogenic greenhouse gas (GHG) emissions has become one of the main environmental concerns faced in this century. Limiting global warming to 1.5ºC by 2100, as established in the Paris Agreement, requires minimizing cumulative emissions of CO2 and other GHGs, such as methane (CH4). In this context, using biofuels (biomass) associated with CO2 Capture and Storage (CCS) processes is an attractive solution in order to achieve zero carbon dioxide emissions in industrial processes. Therefore, Biomass Chemical Looping Gaseification – BCLG emerged as an innovative and advantageous option in relation to conventional gasification, as it produces high purity synthesis gas, not diluted in N2 and with less energy and economic penalty. A key criterion in the development of the BCLG process is the proper selection of an oxygen carrier. It should be noted that the use of iron-based ores and tailings are attractive in CL industrial applications due to their low cost, abundance and heterogeneous composition. In view of this, this doctoral thesis aims to evaluate the potential of four oxygen carriers, based on iron, such as iron ore from Brazil (Carajas - CRJ), iron residue from mining (Derramamento - DRM) and from the industrial steel (Carepa - CRP), as well as the physical mixture of DRM with eggshell residue as a source of CaO (DRM-RCO), for application in the BCLG process. The characterization techniques employed were X-Ray Fluorescence (FRX), X-Ray Diffraction (XRD), Laser Granulometry, Pycnometry, Field Emission Scanning Electron Microscopy (MEV-FEG) with X-Ray Energy Dispersive Spectroscopy (EDX), Programmed Reduction Temperature (RTP), mechanical strength, friction loss (Air Jet Index) and evaluation of reactivity by thermogravimetry. After the physical-chemical characterization, it was verified that CRJ had appropriate properties to be evaluated in the discontinuous fluidized bed reactor - Batch Reactor, using H2, CO and CH4 as fuel gas at different temperatures (850 °C, 900 °C and 950 °C). Then, the characterization techniques were performed: XRD, SEM, Mechanical resistance and post-batch analysis of reactivity with H2 and CH4. It was possible to conclude that the CRJ transporter did not present agglomeration problems at the end of the tests in the Batch Reactor, as well as carbon deposition was not identified. It showed good fuel conversion with H2, followed by CO and finally CH4, with minimal friction loss during 12 hours of operation and maintained its reactivity under hydrogen gas. Therefore, this material presents promising characteristics for the BCLG process.
COMMITTEE MEMBERS:
Presidente - 349770 - DULCE MARIA DE ARAUJO MELO
Interno - 1883170 - MAURICIO ROBERTO BOMIO DELMONTE
Externa ao Programa - 1979301 - RENATA MARTINS BRAGA - UFRNExterno à Instituição - JUAN ADÁNEZ ELORZA
Externo à Instituição - IÑAKI ADÁNEZ RUBIO