Simultaneous removal of soot and NOx with Ru-Ir/TiO2 catalyst under oxygen-rich condition

被引：23
作者：
Zhu, Rongshu [1 ]
Yan, Qingyun [1 ]
He, Jiansheng [1 ]
Cao, Gang [1 ]
Ouyang, Feng [1 ]
机构：
[1] Harbin Inst Technol Shenzhen, Shenzhen Key Lab Organ Pollut Prevent & Control, Shenzhen 518055, Peoples R China
来源：
APPLIED CATALYSIS A-GENERAL | 2017年 / 541卷
关键词：
Simultaneous removal; NO; Soot; Ruthenium-Iridium; Oxygen-rich; OXIDE CATALYSTS; NITROGEN-OXIDES; DIESEL-ENGINE; CARBON SOOT; REDUCTION; OXIDATION; EXHAUST; RU; IR; CO;
D O I：
10.1016/j.apcata.2017.04.014
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A series of Ru-Ir bimetallic catalysts with different mass ratios (Ru-Ir/TiO2, Ru:Ir = 9:1, 7:3, 5:5, 3:7, 1:9) were prepared by iso-volumetric impregnation method. The activities of the catalysts for simultaneous removal of soot and NOx were investigated by Temperature Programmed Surface Reaction (TPSR) technique, and the properties of the catalysts were characterized by various analysis techniques, such as XPS, XRD, TEM, H-2-TPR, H-2-TPD and nitrogen adsorption. The results indicated that Ru-Ir/TiO2 bimetallic catalysts had better activity for simultaneous removal of soot and NOx than Ru/TiO2 or Ir/TiO2. When the mass ratio of Ru:Ir was 9:1, the catalyst showed the best catalytic activity. The peak temperature of soot oxidation was 437 degrees C and the highest conversion efficiency of NO,, was 42.6%. On the basis of the characterization of the catalysts, the relationship between the catalytic activity of Ru-Ir/TiO2 and the synergetic roles of Ru and Ir was discussed.
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页码：42 / 49
页数：8
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