Craqueamento do n-heptano sobre zeólitas Y: formação do coque e desativação.

Abstract

The presence of nitrogenous compounds in the braziiian gasoil reduces the performance of the zeolite based catalyst used in the fluid catalytic cracking (FCC) process. The FCC is the main process of the oil refining, which converts heavy feedstocks into light more valuable hidrocarbons, specially gasoline and light olefins. The n-heptane cracking was used as a model reaction either pure or in the presence of 1 % quinoline (C9H7N), aiming to study the quinoline influence on the H-Y zeolite deactivation. The obtained results confirm the poisoning effect of quinoline during nheptane cracking over a commercial Y zeolite (CBV 500). Indeed, the activity of this catalyst is severely reduced in the presence of this base. The deactivation of the HY zeolite is mainly related to coke formation, being more pronounced when quinoline is present in the feed.