关键词: 选择性还原NO, SO₂和H₂O, 锰/二氧化钛, Y掺杂

Abstract: Y-doped TiO₂support was preparedby sol-gel method，followed by the impregnation of Mn oxides loading toform Mn-Y/TiO₂catalyst.The effects of calcination temperature andspace velocity onthe performancein thecatalytic reduction ofNO were studied. And the poisoned performance of anti-SO₂，H₂O was also investigated. The resultsshowed that the optimal calcination temperature was 500 ℃，catalytic activity increased with the decrease of GHSV. XRD analysis indicates that Ydoping could restrainthe transfer fromanatasephase to rutile，provide better dispersion of active components on catalyst surface，and therefore，increase the catalytic activity. The anti-poisoned performance of Mn-Y/TiO₂ was better than Mn-Y/TiO₂，under the condition of temperature 180 ℃，space velocity14000 h^-1，the oxygen content3%，NOconcentration 600 mL/LandNH₃/NO，NO conversion was improved from 48.2% of Mn/TiO₂ to 57.6%. Y doping could enhanced the anti-poisoned capability. FTIR analysis showed that the catalyst poisoning may result from the generation of ammonium sulfate or manganese，yttrium sulfate.

Key words: selective reduction of NO, SO₂ and H₂O, Mn/TiO₂, Y-doped