ARAÚJO, A. S.; http://lattes.cnpq.br/3755167376239169; ARAÚJO, Alfredina dos Santos.
Résumé:
The zeolites are minerais that present as particular properties to the change of
ions and the desorption of water that justifies the possible industrial application in of
refining chemical process and petroleum. The deactivation catalyst during the reactions
of catalytics cracking, hidrocarbons conversion of methanol, etc. It's one of main
technological and economics problems of petrochemical industry. The nitrogenous
presence compost as impure in the Brazilian petroleum, present a little make use of the
zeolite that is used process in the fluid catalytic cracking (FCC), responsible for the
transformation of gasoil in hidrocarbons of spicily gasoline. In this paper were
established distinct phases. In the first one was done a characterization of H-Y zeolite
deactivated during the cracking of the n-heptane at 450°C so, X- ray diffraction (XRD)
and Physical Adsorption of the Nitrogen had been used (B.E.T. Model) tecnics were
used. From this characterization was possible to check that deactivation takes place
because of the blocking of pores. In the second phase the influence of the temperature
over the formation of the coke was evalueted, where was verificated that the
deactivation happened because of two factors: The formation of coke and poisoning of
nitrogenous compounds (quinoline). The third phase was realized with objective of
checking the effect of poisoning of nitrogenous compounds over the performance of
catalyst H-Y during cracking of the n-heptane. In this phase is conclude that the
presence of the quinoline is the fundamental factor in deactivation of catalyst.
