Catalytic pathwayz and deactivation in alternative sources of fuel productionbutene oligomerizaton and ship/shale-gasoils cracking

  1. IZADDOUST, SEPIDEH
Supervised by:
  1. Eva Epelde Bejerano Director
  2. Pedro Castaño Sanchez Director
  3. Javier Bilbao Elorriaga Tutor

Defence university: Universidad del País Vasco - Euskal Herriko Unibertsitatea

Fecha de defensa: 20 April 2023

Type: Thesis

Teseo: 805383 DIALNET lock_openADDI editor

Abstract

Catalytic pathways and deactivation on acid catalysts have been studied for two industrial catalytic processes implemented in the current refinery, oligomerization and FCC units, which are versatile for facing the recent changes in supply/demand of transportation fuels (gasoline and diesel) within the energy transition scenario. For this purpose, each process has been studied separately, in different types of reactors: fixed bed and operando UV-Vis cell reactors, for oligomerization and a riser simulator for FCC. Other feeds have been used: (i) 1-butene (n-butenes in equilibrium) for oligomerization; and non-conventional (shale oil) and conventional VGO, and MARPOL C type residue, for FCC. Likewise, two heterogeneous acid catalysts have been used: HZSM-5 and HY zeolite-based catalysts for oligomerization and FCC, respectively. The main goal has been to establish the effect of operating conditions (temperature, pressure, space time, partial pressure), the use of alternative feeds, especially to be incorporated into FCC units, on the catalytic performance (conversion, main lumped product selectivity-yield, and catalyst stability) and on coke deactivation. Used catalysts have been analyzed using several characterization techniques: TPD-N2/TPO, HeTPD-GC/MS, soluble coke extraction, FTIR, and FT-ICR MS spectroscopies.