Catalytic SO₂ oxidation in a periodically operated trickle‐bed reactor

Abstract

CentaurTM carbon (Calgon Carbon Corp.) was used as a catalyst for SO2 oxidation in a trickle bed under periodic interruption of its liquid flow for cycle periods from 15 to 60 min, cycle splits (split being the proportion of a cycle in which liquid flows) from 0.0083 to 0.2, and feed temperatures about 80°C. SO2 removal in the trickle bed was improved at longer periods. At a fixed period of 15 min, a maximum occurred with split. At high splits, platinized and unplatinized carbons performed indistinguishably. Results suggested kinetic rate control at low splits and oxygen mass transport control at high splits.

Carbon materials and catalytic wet air oxidation of organic pollutants in wastewater

“…periodic operation, is another example for dynamic behaviour of TBR. Periodic operation was experimentally studied for the catalytic oxidation of phenol [35] and SO 2 [200,240] over activated carbon. Proper adjusting of feed cycle period length and its split value was shown to increase conversion if the reaction system is limited by the gaseous reactant.…”

Oxidation of SO2 and NO by epoxy groups on graphene oxides: the role of the hydroxyl group

“…[5][6][7][8] In the reaction, SO 2 is oxidized to form SO 3 , which in turn is hydrated to sulfuric acid in the presence of water. The oxidation of SO 2 to SO 3 is supposed to be the rate-determining step 9 and can be improved by introduction of surface oxygen groups (C-O complexes).…”

Periodic Operation of Three — Phase Catalytic Reactors

“…At s = 0.3, the maximum rate is at s = 0.3, the maximum rate is at s τ = 10 min., while at s = 0.5, s = 0.5, s the maximum is observed at τ = 16 min. Castellari and Haure explain this split effect through the temperature variations Lee et al (1996) with permission of the authors).…”

“…Several papers describe an extension of the Haure work to the scrubbing of industrial stack gases as one step of the two step RTI-Waterloo Process (Metzinger et al, 1994;Lee et al, 1995Lee et al, , 1996. Figure 5 presents a schematic of the process as conceived for stack gas from a coal burning power plant.…”