Application of a three-stage approach for modeling the complete period of catalyst deactivation during hydrotreating of heavy oil

Application of a three-stage approach for modeling the complete period of catalyst deactivation during hydrotreating of heavy oil

Type	Journal Article
Author	Ignacio Elizalde
Author	Jorge Ancheyta
URL	http://www.sciencedirect.com/science/article/pii/S001623611400221X
Volume	Available online 14 March 2014
Issue	In Press, Corrected Proof
Publication	Fuel
Abstract	Researchers conducted modeling of catalyst deactivation caused by hydrodeasphaltenization (HDAsph), hydrodemetallization (HDM) and hydrodesulfurization (HDS) reactions with time-on-stream (TOS) using a model that considers three deactivation stages: start-of-run (SOR), middle-of-run (MOR) and end-of-run (EOR). They obtained experimental data of kinetics, intra-particle mass transfer and conversion affected by deactivation phenomena from a laboratory scale reactor. They investigated loss of activity at constant operating conditions of temperature, pressure, liquid hourly space velocity (LHSV) and H2-to-oil ratio for a range of time-on-stream. They observed that differing deactivation patterns are obtained depending on the considered reaction. They predict that catalyst exhibits higher rate of deactivation for HDS than for HDM at long TOS.