Study on Co-Effect of K<sub>2</sub>SO<sub>4</sub> Deposition and Low Concentration SO<sub>2</sub> on Performances of V<sub>2</sub>O<sub>5</sub>/AC Catalysts for Low Temperature SCR — Oak Academic Publishing
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Study on Co-Effect of K<sub>2</sub>SO<sub>4</sub> Deposition and Low Concentration SO<sub>2</sub> on Performances of V<sub>2</sub>O<sub>5</sub>/AC Catalysts for Low Temperature SCR
Simulated compounds were prepared by loading K<sub>2</sub>SO<sub>4</sub> onto V<sub>2</sub>O<sub>5</sub>/AC catalysts. Study the effect of K<sub>2</sub>SO<sub>4</sub> on V1/AC catalysts in the presence of low concentration SO<sub>2</sub>. Transient response techniques, TPD was carried out. The results indicated that the DeNO activity of V1/AC catalysts was decreased seriously in the early period of operation, but the deactivation was gradually diminished with SO<sub>2</sub> adsorption and then, it was completely eliminated. For the sulphated catalysts (saturated catalysts by sulphate), their SCR activity were free from existence of gaseous SO<sub>2</sub>. the loss of activity about 10% caused by K<sub>2</sub>SO<sub>4</sub> was found on them. The deactivation of K<sub>2</sub>SO<sub>4</sub> deposited catalysts was due to the decrease of adsorbed and activated NH<sub>3</sub>, or some acid sites.
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