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.