Promotion of ceria for decomposition of ammonia bisulfate over V2O5-MoO3/TiO2 catalyst for selective catalytic reduction

Ammonia bisulfate (ABS) that usually generates on the surface of SCR catalysts has strong negative effect on selective catalytic reduction (SCR) process at low temperatures (<220 degrees C, dew-point temperature of ABS). In this work, the decomposition of ABS over CeO2 and V2O5-MoO3/CeO2-TiO2 catalyst was investigated in detail via TG-MS analysis. The results showed that CeO2 could facilitate the decomposition of ABS over the V2O5-MoO3/CeO2-TiO2 catalyst, on which cerium sulfate species formed by the interaction of CeO2 and ABS. (C) 2016 Elsevier B.V. All rights reserved.