Nanocrystalline V2O5,WO3/(CeO2-TiO2) and V2O5,WO3/(Y2O3-TiO2) catalysts with enhance thermal stability and activity in the reduction of NO with NH3 into N2

• Published in: Materials today : proceedings Vol. 4; no. 11; pp. 11490 - 11494
• Main Authors: Shutilov, R.A., Shutilov, A.A., Zenkovets, G.A.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 2017
• Subjects: Enhance thermal stability; Purification of diesel exhaust; Selective catalytic reduction of NO with ammonia to N2; Textural properties; Vanadia supported nanocrystalline titania dopped with ceria and yttria; Vanadia supported nanocrystalline titania dopped with ceria and yttria; Selective catalytic reduction of NO with ammonia to N2; Purification of diesel exhaust; Textural properties; Enhance thermal stability
• ISSN: 2214-7853; 2214-7853
• DOI: 10.1016/j.matpr.2017.09.035

It was shown that V2O5, WO3/(CeO2-TiO2) and V2O5, WO3/(Y2O3 -TiO2) catalysts prepared with TiO2 support doped with ceria or yttria demonstrate the high catalytic activity and enhanced thermal stability in selective catalytic reduction NO by NH3 to N2 compared to the well-known industrial V2O5, WO3/TiO2 catalysts. It is due to the use the catalysts preparation of ceria or yttria doped TiO2 of anatase phase as a new support. Modification of TiO2 with ceria or yttria additives leads to the formation of nanocrystalline structure of anatase which is more stable under the heating at 850 °C compared of a pure anatase with regular crystal structure. Increasing the thermal stability of support leads to the high thermal stability of the supported V2O5, WO3/(CeO2 - TiO2) and V2O5, WO3/(Y2O3 -TiO2) catalysts characterized by the developed specific surface area.