Effect of water vapor on sulfur poisoning of MnOx–CeO2/Al2O3 catalyst for diesel soot oxidation
作者： Yuxi Gao , Xiaodong Wu , Shuang Liu , Duan Weng , Rui ran
DOI: 10.1039/C6RA09241A
关键词:
摘要: MnOx–CeO2 mixed oxide supported on γ-Al2O3 was sulfated in dry and wet atmospheres to explore the effect of water during sulfur poisoning. The fresh poisoned catalysts were characterized by Brunauer–Emmett–Teller (BET), thermo-gravimetric analysis (TGA), NH3 temperature-programmed desorption (NH3-TPD), infrared spectroscopy (IR), H2 reduction (H2-TPR), NO oxidation (NO-TPO) soot (soot-TPO). results show that hinders sulfate deposition catalyst. catalyst with abundant surface hydroxyl groups has higher acidity than one. Although presence does not prevent deprivation redox properties, generated acid sites may promote NO2 utilization efficiency deep O2, resulting less deactivation
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