Direct Decomposition of NO on Ba Catalysts Supported on Ce-Fe Mixed Oxides

被引：18

作者：

Hong, Won-Jong ^{[1
]}

Iwamoto, Shinji ^{[2
]}

Inoue, Masashi ^{[1
]}

机构：

[1] Kyoto Univ, Grad Sch Engn, Dept Energy & Hydrocarbon Chem, Kyoto 6158510, Japan

[2] Gunma Univ, Grad Sch Engn, Dept Chem & Chem Biol, Kiryu, Gunma 3768515, Japan

来源：

CATALYSIS LETTERS | 2010年 / 135卷 / 3-4期

关键词：

NO decomposition; Barium catalyst; Ce-Fe oxide; CO2-TPD; NITRIC-OXIDE; REDUCTION BEHAVIOR; SOLID-SOLUTIONS; TEMPERATURE; STABILITY; N-2; NITROGEN; OXYGEN; WATER; O-2;

D O I：

10.1007/s10562-010-0296-1

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：

Cerium-iron mixed oxides were prepared by a glycothermal method, and NO decomposition reactions over these oxides and barium catalysts supported on them were examined. Although Ce-Fe mixed oxides (Ce-Fe(x), x = Fe/(Ce + Fe) molar ratio) exhibited only low activities for the direct decomposition of NO into N-2 and O-2, Ba catalysts supported on these mixed oxides are active for this reaction. The highest NO conversion was achieved with 3 wt% BaO/Ce-Fe(0.02). The NO conversion on this catalyst increased with increasing reaction temperature, and NO conversion was 51% at 800 degrees C. The high activity of this catalyst was maintained for more than 10 h and a relatively high NO conversion (23%) was obtained even in the presence of 5% oxygen. The XRD results indicated the formation of Ce-Fe(x) solid solutions with a cubic fluorite structure. The CO2-TPD results indicated NO decomposition activities of the catalysts were correlated with their basicities.

引用

页码：190 / 196

页数：7

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