MELO, C. A.; http://lattes.cnpq.br/3270451228102539; MELO, Cleide Almeida.
Résumé:
The presence of sulfur compounds in petroleum fractions is highly undesirable
since they result in corrosion and environmental pollution. The conventional
hydrotreating technologies used at present for this purpose involve high costs,
complex facilities and uses sophisticated catalysts. Recently, proposals have
appeared for the additional removal of sulfur contents in the gasoline through the
processes of adsorption. In this work the zeolite Beta was used as adsorbent,
impregnated with 0,25; 0,5; 5,0; 7,0% % of zinc and 1,5 % of nickel with the
purpose of removing the sulfur of the gasoline. The zeolite Beta was synthesized
and characterized through DRX, SEM and TGA. After the synthesis that material
was impregnated with zinc and nickel and accomplished the kinetic tests and
modeling to coefficient off diffusion in the microporous for the kinetcs of adsorption.
The results showed that adsorbent NiBeta-5% adsorb significantly the mercaptan
of the synthetic gasoline verifying like this, that that adsorbent is quite promising in
the process of adsorption of sulfur of the gasoline. The propesed kinetics model
predicts with good agreement in the operational range used is this work.
