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Title: Studies on Cu/CeO{sub 2}: A new NO reduction catalyst

Abstract

Fine particle and large surface area Cu/CeO{sub 2} catalysts of crystallite sizes in the range of 100--200 {angstrom} synthesized by the solution combustion method have been investigated for NO reduction. Five percent Cu/CeO{sub 2} catalyst shows nearly 100% conversion of NO by NH{sub 3} below 300 C, whereas pure ceria and Zr, Y, and Ca doped ceria show 85--95% NO conversion above 600 C. Similarly NO reduction by CO has been observed over 5% Cu/CeO{sub 2} with nearly 100% conversion below 300 C. Hydrocarbon (n-butane) oxidation by NO to CO{sub 2}, N{sub 2}, and H{sub 2}O has also been demonstrated over this catalyst below 350 C making Cu/CeO{sub 2} a new NO reduction catalyst in the low temperature window of 150--350 C. Kinetics of NO reduction over 5% Cu/CeO{sub 2} have also been investigated. The rate constants are in the range of 1.4 {times} 10{sup 4} to 2.3 {times} 10{sup 4} cm{sup 3}/g s between 170 and 300 C. Cu/CeO{sub 2} catalysts are characterized by X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, and electron paramagnetic resonance spectroscopy where Cu{sup 2+} ions are shown to be dispersed on the CeO{sub 2} surface.

Authors:
; ; ;  [1]
  1. Indian Inst. of Science, Bangalore (India)
Publication Date:
OSTI Identifier:
687725
Resource Type:
Journal Article
Journal Name:
Journal of Catalysis
Additional Journal Information:
Journal Volume: 186; Journal Issue: 1; Other Information: PBD: 15 Aug 1999
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 01 COAL, LIGNITE, AND PEAT; 02 PETROLEUM; COPPER; CERIUM OXIDES; CATALYTIC EFFECTS; NITRIC OXIDE; SELECTIVE CATALYTIC REDUCTION; AMMONIA; ZIRCONIUM; YTTRIUM; CALCIUM; CARBON MONOXIDE; CHEMICAL REACTION KINETICS; AIR POLLUTION CONTROL

Citation Formats

Bera, P., Aruna, S.T., Patil, K.C., and Hegde, M.S. Studies on Cu/CeO{sub 2}: A new NO reduction catalyst. United States: N. p., 1999. Web. doi:10.1006/jcat.1999.2532.
Bera, P., Aruna, S.T., Patil, K.C., & Hegde, M.S. Studies on Cu/CeO{sub 2}: A new NO reduction catalyst. United States. doi:10.1006/jcat.1999.2532.
Bera, P., Aruna, S.T., Patil, K.C., and Hegde, M.S. Sun . "Studies on Cu/CeO{sub 2}: A new NO reduction catalyst". United States. doi:10.1006/jcat.1999.2532.
@article{osti_687725,
title = {Studies on Cu/CeO{sub 2}: A new NO reduction catalyst},
author = {Bera, P. and Aruna, S.T. and Patil, K.C. and Hegde, M.S.},
abstractNote = {Fine particle and large surface area Cu/CeO{sub 2} catalysts of crystallite sizes in the range of 100--200 {angstrom} synthesized by the solution combustion method have been investigated for NO reduction. Five percent Cu/CeO{sub 2} catalyst shows nearly 100% conversion of NO by NH{sub 3} below 300 C, whereas pure ceria and Zr, Y, and Ca doped ceria show 85--95% NO conversion above 600 C. Similarly NO reduction by CO has been observed over 5% Cu/CeO{sub 2} with nearly 100% conversion below 300 C. Hydrocarbon (n-butane) oxidation by NO to CO{sub 2}, N{sub 2}, and H{sub 2}O has also been demonstrated over this catalyst below 350 C making Cu/CeO{sub 2} a new NO reduction catalyst in the low temperature window of 150--350 C. Kinetics of NO reduction over 5% Cu/CeO{sub 2} have also been investigated. The rate constants are in the range of 1.4 {times} 10{sup 4} to 2.3 {times} 10{sup 4} cm{sup 3}/g s between 170 and 300 C. Cu/CeO{sub 2} catalysts are characterized by X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, and electron paramagnetic resonance spectroscopy where Cu{sup 2+} ions are shown to be dispersed on the CeO{sub 2} surface.},
doi = {10.1006/jcat.1999.2532},
journal = {Journal of Catalysis},
number = 1,
volume = 186,
place = {United States},
year = {1999},
month = {8}
}