LI Jianguang, HUANG Yan*, PENG LIli

(Department of Environmental Science &Engineering, Xiang tan University, Xiangtan 411105)

Abstract: The CeO₂ / HBEA catalyst was prepared by incipient wetness impregnation method. The effect of the CeO₂ content, calcination temperature, oxygen concentration and space velocity on NO conversion were examined. The effect of SO₂ and water vapor were also discussed. The means of BET, X-ray diffraction, SEM, TGA and FTIR were adopted to characterize the catalyst. CeO₂ / HBEA catalyst exhibited high denitration activity at a temperature from 220 to 400℃, the NO conversion reached 96.49% at the condition of GHSV 12000 h^-1 and 220℃.The catalyst’s activity was little affected at the presence of H₂O.To some extent, SO₂ inhibited the catalytic activity at lower temperature, abut the activity could be partly restored as temperature increased. Consequently, CeO₂ / HBEA catalyst ,had good application prospect owing to its good low-temperature activity, superior gas velocity flexibility, resistance to sulfur and water poisoning performance.

Key words: CeO₂/HBEA; SCR; Sulfur dioxide; Water vapor

E-mail: xtuhy@163.com

Journal of Molecular Catalysis, Vol. 26, Issue 1, 2012,52-61