An exploratory study on simultaneous removal of soot and NO x over Ir/γ-Al 2O 3 catalyst in the presence of O 2

• Published in: Catalysis communications Vol. 9; no. 6; pp. 1184 - 1188
• Main Authors: Zhu, Rongshu, Guo, Mingxin, Ci, Xinbo, Ouyang, Feng
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 2008
• Subjects: Diesel exhaust; Ir/γ-Al 2O 3; Simultaneous removal; Soot; NO; Soot; Ir/γ-Al 2O 3; Simultaneous removal; Diesel exhaust
• ISSN: 1566-7367; 1873-3905
• DOI: 10.1016/j.catcom.2007.11.001

The potentiality of Ir/γ-Al 2O 3 catalyst for the simultaneous removal of soot and NO x in the presence of O 2 has been investigated by using temperature programmed reaction (TPR) technique. Ir/γ-Al 2O 3 exhibits a high activity. The simultaneous removal paths are that the NO 2 formation by the oxidation of NO promotes the soot oxidation and the CO formation by the soot oxidation reduces NO. Furthermore, the adsorbed–dissociation of NO 2 also promotes the NO x reduction. The comparison between Ir/γ-Al 2O 3 and Pt/γ-Al 2O 3 reveals that Ir/γ-Al 2O 3 is a more effective catalyst for the simultaneous removal of soot and NO x .