Banca de DEFESA: ADJANE DAMASCENO DE OLIVEIRA

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : ADJANE DAMASCENO DE OLIVEIRA
DATE: 14/12/2023
TIME: 09:00
LOCAL: Pós-Graduação Engenharia Civil
TITLE:

Waste-to-Energy: Refuse Derived Fuel - Feasibility And Potential

KEY WORDS:

Municipal solid waste; refuse derived fuels; energy from waste; energy recovery; energy recycling; sustainable development.

PAGES: 238
BIG AREA: Engenharias
AREA: Engenharia Civil
SUMMARY:

The energetic use of municipal solid waste (MSW) as a source of energy and heat is a reality in many countries. Discussions around the mitigation of greenhouse gas emissions and adherence to commitments towards fossil carbon neutrality highlight the need for alternative sources in the energy sector. On the other hand, in the solid waste sector there is the challenge of implementing and maintaining efficient management, reducing the amount sent for final disposal. This establishes a point of convergence between the two sectors in order to address issues of significant environmental, economic and social impact. Waste-to-energy technologies have been consolidating on the global scenario, but heterogeneity is one of the weak points. In this regard, it is necessary to obtain a material with more homogeneous characteristics and produced with quality control: refuse derived fuels (RDF). This research therefore analyzed the feasibility of producing and using RDF. To this end, legal and regulatory aspects and the national production and consumption scenario were assessed. The potential  for RDF production in the Metropolitan Region of Recife (RMR) was estimated based on scenarios derived from the targets set out in the National Solid Waste Plan (Planares) and the potential for use in cement plants, based on the targets set out in the Roadmap for the Cement Industry in Brazil. It is also important to know the characteristics of RDF produced in the country and, to this end, the physical, chemical and thermal characterization of RDF was carried out. In addition, the impacts of RDF production and use on achieving the Sustainable Development Goals (SDGs) were assessed. With regard to legal and regulatory aspects, there is still a need for a more robust structure so that the stakeholders involved in the development of the sector can act with greater certainty. It was found that there is a cement industrial park in Brazil that demands the production of alternative fuels, and there are still other technologies capable of adapting to the use of this fuel. In terms of production, projections indicate that by 2040 there will be an average recovery of up to 45.1% of MSW in the form of RDF compared to the amount of MSW collected. In terms of using RDF to replace petroleum coke, it can be seen that there is economic and environmental viability due to the savings of US$ 98.6 million and 595,000 tons of CO2e emissions per year avoided by replacing 17% of the fossil fuel with RDF. In terms of characterization, the textile, paper/paperboard and plastic fractions represent the largest percentage of the composition of the 10 RDF samples analysed, with the first two fractions being the main components contributing to their biomass content, which varies from 39% to 57%. The moisture content varies between 18.5% and 36.2%, volatile material between 65.4% and 79.5% and ash between 14.5% and 29%. The elemental composition includes carbon (43.2% to 52.7%), oxygen (27.7 to 32.7%) and chlorine (0.2 to 0.8%). The lower calorific value ranges from 16.9 MJ.kg-1 to 22 MJ.kg-1 and mercury content ranges from 0.02 mg.kg-1 to 0.29 mg.kg-1. The metals with the highest percentages in the samples were Cr, Zi, Ni and Cu. Thermal analysis in oxidizing and inert atmospheres indicated 4 peaks of mass loss, with the process ending at 500oC and 700oC. It was found that the production and use of RDF correlates with SDGs 3, 6, 7, 8, 9, 11, 12, 13, 14 and 15. The results show that RDF is viable for production and has potential for use in Brazil.

COMMITTEE MEMBERS:
Externo à Instituição - EDUARDO CÉSAR DE MIRANDA LOUREIRO - UPE
Externa à Instituição - LISETE CELINA LANGE - UFMG
Externa ao Programa - 1132503 - MARIA DE LOS ANGELES PEREZ FERNANDEZ - nullPresidente - 3199298 - MAURICIO ALVES DA MOTTA SOBRINHO
Externo à Instituição - RONALDO STEFANUTTI - UFC