Matrizes poliméricas puras e modificadas para adsorção do gás sulfeto de hidrogênio
The underground natural gas found associated or not with oil is characterized by a mixture of hydrocarbons and residual components such as carbon dioxide (CO2), nitrogen gas (N2) and hydrogen sulfide (H2S), called contaminants. The H2S especially promotes itself as a contaminant of natural gas to be...
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Formato: | Dissertação |
Idioma: | por |
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Universidade Federal do Rio Grande do Norte
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Endereço do item: | https://repositorio.ufrn.br/jspui/handle/123456789/17710 |
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Resumo: | The underground natural gas found associated or not with oil is characterized
by a mixture of hydrocarbons and residual components such as carbon dioxide
(CO2), nitrogen gas (N2) and hydrogen sulfide (H2S), called contaminants. The H2S
especially promotes itself as a contaminant of natural gas to be associated with
corrosion of pipelines, to human toxicity and final applications of Natural Gas (NG).
The sulfur present in the GN must be fully or partially removed in order to meet the
market specifications, security, transport or further processing. There are distinct and
varied methods of desulfurization of natural gas processing units used in Natural Gas
(UPGN). In order to solve these problems have for example the caustic washing,
absorption, the use of membranes and adsorption processes is costly and great
expenditure of energy. Arises on such findings, the need for research to active
processes of economic feasibility and efficiency. This work promoted the study of the
adsorption of sulfide gas in polymer matrices hydrogen pure and modified. The
substrates of Poly(vinyl chloride) (PVC), poly(methyl methacrylate) (PMMA) and
sodium alginate (NaALG) were coated with vanadyl phosphate compounds
(VOPO4.2H2O), vanadium pentoxide (V2O5), rhodamine B (C28H31N2O3Cl) and ions
Co2+ and Cu2+, aiming to the adsorption of hydrogen sulfide gas (H2S). The
adsorption tests were through a continuous flow of H2S in a column system (fixed
bed reactor) adsorption on a laboratory scale. The techniques used to characterize
the adsorbents were Infrared spectroscopy (FTIR), thermogravimetry analysis (TGA),
X-ray fluorescence (XRF), the X-ray diffraction (XRD) electron microscopy (SEM).
Such work indicates, the results obtained, the adsorbents modified PMMA, PVC and
NaALG have a significant adsorptive capacity. The matrix that stood out and had the
best adsorption capacity, was to ALG modified Co2+ with a score of 12.79 mg H2S / g
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