Theoretical and experimental study of the interaction between NOx reduction and SO2 oxidation over DeNOx-SCR catalysts

Dynamics of the SCR‐DeNOx reaction by the transient‐response method

“…Although a number of studies have been devoted to mechanical and steady-state kinetics of the SCR process (Dumesic et al, 1993;Tufano and Turco, 1993;Odenbrand et al, 1994;Topsae et al, 1995b), the precise sequence of steps involved in the reaction is still far from being completely understood. Studies on the dynamics of the reaction, on the other hand, are scarce in the literature (Andersson et al, 1994;Noskov et al, 1996;Orsenigo et al, 1996;Tronconi et al, 1996). In view of this situation, a study of the DeNO, reaction under nonstationary conditions has been undertaken in our laboratories in order to gain additional insight into the adsorption-desorption characteristics of the reactants NH, and NO, and into the mechanics and the dynamic behavior of the reaction.…”

XANES and DRIFTS study of sulfated Sb/V/Ce/TiO2 catalysts for NH3-SCR

“…The SO 2 was catalytically oxidized into SO 3 or sulfation species on vanadia. Then, SO 3 or sulfation species were adsorbed by or move into ceria to form bulk-like sulfate species.However, the rate of SO 2 oxidation on vanadia catalysts is increased at temperatures higher than 600 K by the formation SO 3 species[47,48], which can further react to form stable metal sulfates. This could be a possible reason for the formation of fewer amounts of cerium sulfate species on Sb/V/Ce/Ti-S300 catalyst, which was sulfated at 300 ºC.…”

Research progress on ammonium bisulfate formation and control in the process of selective catalytic reduction

“…When flue gas from economizer of boiler passes through the vanadium‐based catalyst directly, partial SO 2 is oxidized to SO 3 under the catalytic of vanadium . The reaction mechanism is presented as below: …”

“…When flue gas from economizer of boiler passes through the vanadium-based catalyst directly, partial SO 2 is oxidized V C 2016 American Institute of Chemical Engineers to SO 3 under the catalytic of vanadium [9][10][11]. The reaction mechanism is presented as below:…”

“…9, the escaped NH 3 directly reacts with SO 3 and H 2 O to generate liquid ABS. Compared to reaction (9), reaction (10) shows that SO 3 reacts with H 2 O to form sulfuric acid vapor directly.…”