Estudo da capacidade de adsorção do carvão ativado de osso bovino para remoção de ácidos naftênicos em mistura modelo e real de querosene de aviação
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2020-02-07
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Universidade Federal de Goiás
Resumo
Aviation kerosene is one of the petroleum derivatives obtained by the distillation of crude oil at
temperatures ranging from 150 to 300 oC. The presence of naphthenic acids in this fuel provides
thermal instability and increased acidity, which consequently increases the corrosion effect on
aircraft engines. Naphthenic acid removal can be obtained by adsorption employing porous
materials. Thus, the main objective of this work was to evaluate bovine bone activated charcoal
(CAB) for its ability to remove n-dodecanoic acid (AD) in model and real mixture of aviation
kerosene through data experimental obtained in kinetics and adsorption isotherm. In the kinetic
assay, the equilibrium was reached at 180 min for model mixture and 180 min for real mixture, and
the theoretical models that best fits the experimental data were pseudo-first and pseudo- second
order, respectively. The results indicated a relatively fast adsorption when compared to the use of
other adsorbents presented in literature, such as mesoporous sieves and modified perovskites. In
the adsorption isotherm, it was found that the amount adsorbed in the equilibrium in model and
real mixture was 600 and 780 mg g
-1
, respectively. The model with the best fit was that of
Freundlich. It was possible to recover the CAB after the adsorptive process by thermal
regeneration. Finally, a comparative study was carried out, regarding the efficiency of AD removal,
between the CAB and the polymer filtration system used by the fuel distribution company. CAB
was the most efficient and could become a viable, inexpensive and regenerative option for use as
a filter material.
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SANTOS, D. F. Estudo da capacidade de adsorção do carvão ativado de osso bovino para remoção de ácidos naftênicos em mistura modelo e real de querosene de aviação. 2020. 75 f. Dissertação (Mestrado em Engenharia Química) - Universidade Federal de Goiás, Goiânia, 2020.