Banca de DEFESA: LEDJANE MARIA ALVES OLIVEIRA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : LEDJANE MARIA ALVES OLIVEIRA
DATE: 25/10/2023
TIME: 09:00
LOCAL: Programa de Pós-Graduação em Ciência de Materiais
TITLE:

CHEMICAL AND CRYSTALLOGRAPHIC CHARACTERIZATION OF PHOTOVOLTAIC WASTE OBTAINED BY MECHANICAL SEPARATION

KEY WORDS:

photovoltaic modules; material recycling; chemical composition.

PAGES: 138
BIG AREA: Outra
AREA: Multidisciplinar
SUMMARY:

Climate change challenges our way of life, consumption and production. Among the various solutions that have been suggested, we have the energy transition in search of cleaner, renewable energies such as solar power. The expected installed capacity of photovoltaic energy by 2050 is 5,000 GW. However, the increase in solar energy will result in a significant increase in photovoltaic waste by 2050, estimated between 60 and 78 million tons. Recycling said materials is essential for environmentally proper management. Identifying and chemically characterizing the components of solar panels is crucial for assessing the purity and feasibility of recycling, increasing the economic value of recoverable raw materials and promoting a circular economy. There are currently research groups and companies developing separation processes for photovoltaic materials, using physical and chemical techniques and advanced separation technologies. Due to the aforementioned scenario, the present work identified and chemically and crystallographically characterized mechanically separated photovoltaic materials in the recycling industry, using X-ray Fluorescence Spectroscopy and X-ray Diffraction techniques, analyzing the level of purity of each component and its structural alteration after the recycling process, in order to subsequently enable the appropriate reinsertion of the materials in various segments of the industry. The results indicate that when photovoltaic materials are subjected to a mechanical separation process, contamination occurs and the physical-chemical characteristics of the materials are altered. However, in the case of EVA, which contains greater quantities of other materials such as glass and aggregated semiconductors, the reduction in particle size results in greater purity of the material. With regard to the presence of heavy metals that could contaminate the environment, the additional application of magnetic separation methods or the use of density-based techniques allows for a significant reduction in the concentration of these metals.

COMMITTEE MEMBERS:
Externa à Instituição - MARIA SUELY COSTA DA CÂMARA - UFRPE
Externo à Instituição - JOSÉ FERNANDO DAGNONE FIGUEIREDO - UFRPE
Presidente - 3100969 - NATHALIA BEZERRA DE LIMA