Selective catalytic reduction of nitric oxide by ammonia over V{sub 2}O{sub 5}/TiO{sub 2}, V{sub 2}O{sub 5}/TiO{sub 2}/SiO{sub 2}, and V{sub 2}O{sub 5}-WO{sub 3}/TiO{sub 2} catalysts: Effect of vanadia content on the activation energy

Journal Article · Fri Mar 01 00:00:00 EST 1996 · Industrial and Engineering Chemistry Research

DOI:https://doi.org/10.1021/ie950452y· OSTI ID:225475

Amiridis, M D ^[1]; Solar, J P ^[2]

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1. Univ. of South Carolina, Columbia, SC (United States). Dept. of Chemical Engineering
2. W.R. Grace and Co.-Conn., Columbia, MD (United States). Research Div.

A systematic variation of the V{sub 2}O{sub 5} content of the title catalysts reveals a dependence of the activation energy of the selective catalytic reduction of nitric oxide by ammonia on the surface concentration of vanadia. A significant decrease in activation energy (from approximately 80 to 40 kJ/mol) is observed, as the vanadia surface concentration is increased (from 0.3 to 8 {micro}mol/m{sup 2}). The same results were obtained from tests conducted both in the presence and absence of H{sub 2}O and SO{sub 2}. A possible mechanistic explanation is discussed.

• OSTI ID: 225475
• Journal Information: Industrial and Engineering Chemistry Research, Vol. 35, Issue 3; Other Information: PBD: Mar 1996
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
01 COAL, LIGNITE, AND PEAT
20 FOSSIL-FUELED POWER PLANTS
NITRIC OXIDE
SELECTIVE CATALYTIC REDUCTION
CATALYSTS
CHEMICAL COMPOSITION
ACTIVATION ENERGY
VANADIUM OXIDES
TITANIUM OXIDES
SILICON OXIDES
TUNGSTEN OXIDES
CONCENTRATION RATIO
CHEMICAL REACTION KINETICS
WATER VAPOR
SULFUR DIOXIDE
AMMONIA