Obtenção de uma vitrocerâmica a partir de resíduos da perfuração de poços de petróleo e do beneficiamento do caulim
The production of wastes in many industries has been a major concern for years. Recently, with the increase of environmental awareness, many guidelines have been developed around the countries to protect the world and society. The first tier on a hierarchy of waste management is minimizing its p...
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| Formato: | Dissertação |
| Idioma: | por |
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| Endereço do item: | https://repositorio.ufrn.br/jspui/handle/123456789/25964 |
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| Resumo: | The production of wastes in many industries has been a major
concern for years. Recently, with the increase of environmental awareness,
many guidelines have been developed around the countries to protect the
world and society. The first tier on a hierarchy of waste management is
minimizing its production, followed by reuse or recycle. In the oil industry,
drilling activities generates a considerable amount of wastes. The mining
industry also produces a large amount of wastes considering the whole
production line: from the extraction to final product the loss of raw material
is about 70%. Several authors have studied new products development
incorporating these wastes, especially ceramic materials due to the
heterogeneity of their composition. Therefore, this study aims to develop a
glass ceramic from drill cuttings of oil wells from Potiguar basin and tailings
from kaolin processing in the city of Equador/RN. As an innovative proposal,
the residue samples were collected and their samples characterized to
obtain the best formulation based on a composition SiO2- Al2O3-CaONa2O-K2O-MgO.
The mixture of 10g of drill cuttings, 5g of kaolin waste and
2.5g of Na2O was melted at 1500 °C for 1h, generating a precursor glass
then characterized by X-ray fluorescence (XRF), thermogravimetry and
thermal expansion analysis to support the production of the glass ceramic.
It was also made an X-ray diffraction (XRD) following the temperature
increasing gradually to study the densification and crystallization of the
material. As a subsequent step the glass powder was compacted (forming
a pellet) and also deposited on a metal to test the interaction between its
coefficients of thermal expansion and to check the viability of using the glass
ceramic formed in solid oxide fuel cells (SOFC’s). Both samples were
sintered at 850 °C for 30 minutes. Although the proposed application was
not feasible due to the divergence between the metal and glass coefficients
of thermal expansion (CTE), the glass ceramic structure, analyzed by scanning electron microscopy (SEM) and dispersive energy spectroscopy
(DES), proved the formation of a semi crystalline structure with amorphous
phase. |
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