ISSN 2630-0583 (Print)
ISSN 2630-0656 (Online)
Journal of Current Science and Technology
Journal of Current Science and Technology. Vol.8 No.1 , January - June 2018.
Regeneration of Co3O4–CeO2 catalyst used for odor elimination in an offset-printing factory
Deactivated ball-type Co3O4 -CeO2 catalyst used for odor elimination in an offset printing factory for a year was regenerated by soaking in water. The reaction yield of ethyl acetate to carbon dioxide increased, on regeneration, to 98% from 82% (used catalyst) at 350?C (new catalyst: almost 100%). Sulfur was found in the water (eluate) after soaking the deactivated catalyst; and it is suggested that sulfur, which generally works as a catalyst poison, is dissolved in the water, resulting in recovery of catalyst activity. In the case of ball-type Pt/Al2O3 catalyst, little catalyst deactivation was observed after a year of usage at 350?C; and it is considered that, in this case, the blocking of active sites is suppressed, since the sulfur adsorbed on platinum is easily burned and converted into gas.