Preparation of iron-doped titania-pillared clays and their application to selective catalytic reduction of NO with ammonia

2002 ◽  
pp. 895-902 ◽  
Author(s):  
Dong-Keun Lee ◽  
Sung-Chul Kim ◽  
Seong-Ji Kim ◽  
Ju-Ki Kim ◽  
Ju-Ki Kang ◽  
...  
Keyword(s):  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Pillared Clays ◽  
Reduction Of No ◽  
Iron Doped ◽  
Doped Titania

Vanadium-doped titania-pillared montmorillonite clay as a catalyst for selective catalytic reduction of NO by ammonia

Clay Minerals ◽  
1997 ◽  
Vol 32 (4) ◽  
pp. 665-672 ◽  
Author(s):  
K. Bahranowski ◽  
J. Janas ◽  
T. Machej ◽  
E. M. Serwicka ◽  
L. A. Vartikian
Keyword(s):  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Catalytic Performance ◽  
Pillared Clay ◽  
Area Measurement ◽  
Bet Surface Area ◽  
X Ray Diffraction ◽  
Reduction Of No ◽  
Pillared Montmorillonite ◽  
Doped Titania

AbstractA series of V-doped titania-pillared clay catalysts, characterized by ICP-AES chemical analysis, X-ray diffraction, BET surface area measurement, and ESR spectroscopy, have been tested in the selective catalytic reduction of NO by NH3. An ESR analysis shows that V dopant is anchored to the titania pillars. Vanadyl species with differing degrees of in-plane V-O π-covalent bonding are produced depending on the method of sample preparation. Polymeric V species appear as the V content is increased. Catalytic performance of these systems depends on the method of preparation and on the V content. The best catalyst, converting 90-100% NO in the temperature range 523-623 K, is obtained by exchange of pillared montmorillonite with vanadyl ions, at an extent of exchange below the level where significant amounts of polymeric V species appear. The co-pillared catalyst, containing vanadyl centres characterized by a higher degree of in-plane ncovalent bonding (according to ESR), is less selective than the exchanged samples.

Copper-ion exchanged Ti-pillared clays for selective catalytic reduction of NO by propylene

2011 ◽  
Vol 168 (3) ◽  
pp. 1128-1133 ◽  
Author(s):  
Guang Lu ◽  
Xinyong Li ◽  
Zhenping Qu ◽  
Qidong Zhao ◽  
Ling Zhao ◽  
...  
Keyword(s):  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Copper Ion ◽  
Pillared Clays ◽  
Reduction Of No
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