Siting and reactivity of the Co ions in ferrierite in selective catalytic reduction of NO with CH4

被引：14

作者：

Kaucky, D ^{[1
]}

Dedecek, J ^{[1
]}

Vondrova, A ^{[1
]}

Sobalik, Z ^{[1
]}

Wichterlova, B ^{[1
]}

机构：

[1] Acad Sci Czech Republ, J Heyrovsky Inst Phys Chem & Electrochem, CR-18223 Prague 8, Czech Republic

来源：

COLLECTION OF CZECHOSLOVAK CHEMICAL COMMUNICATIONS | 1998年 / 63卷 / 11期

关键词：

selective catalytic reduction of NO with methane; co-zeolite; co-ferrierite; nitric oxide; zeolites; heterogeneous catalysis; cobalt;

D O I：

10.1135/cccc19981781

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Catalytic activity of Co ions in CoNaK- and CoH-fenrierites in selective catalytic reduction of NO with methane depending on Co loading was investigated. The previously determined distribution of the exchanged Co ions in Co-ferrierites at three different cationic sites, differring in coordination of the Co ions to framework oxygens, has been utilized to analyze catalytic activity of the Co ions. The type of coordination of the Co ions dramatically affects their reactivity in the selective catalytic reduction of NO with methane. The Co ions coordinated to four framework oxygens of the wall of the main channel exhibit the highest activity, while the Co ions placed in a "boat shape", the most packed site of ferrierite show the lowest activity.

引用

页码：1781 / 1792

页数：12

共 13 条

[1] NOx/hydrocarbon reactions over gallium loaded zeolites: A review [J].