Degradação termocatalítica de PEAD e PP utilizando as zeólitas H-Y e H-Beta para produção de combustíveis líquidos
The problem of environmental pollution caused by improper disposal of plastics in the environment has become the subject of countless discussions among scientists over the last decades. Polymers, which are essential for industry in many industries, have low biodegradability, whose degradation tim...
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| Formato: | Dissertação |
| Idioma: | pt_BR |
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| Endereço do item: | https://repositorio.ufrn.br/jspui/handle/123456789/28403 |
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| Resumo: | The problem of environmental pollution caused by improper disposal of plastics
in the environment has become the subject of countless discussions among scientists
over the last decades. Polymers, which are essential for industry in many industries,
have low biodegradability, whose degradation time can vary from a few decades to
several hundred years. In recent years, one of the alternatives that has been calling the attention of
researchers to try to overcome this problem is the thermocatalytic degradation of
thermoplastic materials. This type of process aims to generate low molecular weight
and high added value compounds such as hydrocarbons with carbon chain size similar
to fossil fuels. In this study, samples of high density polyethylene (HDPE) and polypropylene
(PP) were subjected to thermal (without catalysts) and thermocatalytic degradation
through the use of HY and H-Beta zeolites in a thermogravimetric balance and in a
bench reactor. For the tests in the thermogravimetric balance, the parameters of kinetic
study, such as activation energy, were raised and for the tests in the bench reactor,
the products were collected and later analyzed by gas chromatography, in order to
obtain an estimate carbon distribution of the formed products. Zeolitic materials were
characterized by X-ray diffractometry, scanning electron microscopy and n-butylamine
desorption acidity assays. From the results obtained, it can be concluded that it is possible to generate
hydrocarbon fractions in the range of gasoline and diesel oil in both thermal
degradation processes. However, the use of zeolitic catalysts, in addition to reducing
the degradation temperature, contributes to the final product having a distribution of
smaller carbon chains, getting closer to gasoline. |
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