skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Factors affecting CO oxidation over nanosized Fe{sub 2}O{sub 3}

Abstract

Nanocrystallite iron oxide powders with different crystallite sizes were prepared by co-precipitation route. The prepared powders with crystallite size 75, 100 and 150 nm together with commercial iron oxide (250 nm) were tested for the catalytic oxidation of CO to CO{sub 2}. The influence of different factors as crystallite size, catalytic temperature and weight of catalyst on the rate of catalytic reaction was investigated using advanced quadrupole mass gas analyzer system. It can be reported that the rate of conversion of CO to CO{sub 2} increased by increasing catalytic temperature and decreasing crystallite size of the prepared powders. The experimental results show that nanocrystallite iron oxide powders with crystallite size 75 nm can be recommended as a promising catalyst for CO oxidation at 500 deg. C where 98% of CO is converted to CO{sub 2}. The mechanism of the catalytic oxidation reaction was investigated by comparing the CO catalytic oxidation data in the absence and presence of oxygen. The reaction which was found to be first order with respect to CO is probably proceeded by adsorption mechanism where the reactants are adsorbed on the surface of the catalyst with breaking O-O bonds, then CO pick up the dissociated O atommore » forming CO{sub 2}.« less

Authors:
 [1];  [2];  [3];  [2]
  1. Central Metallurgical Research and Development Institute (CMRDI), P.O. Box 87, Helwan, Cairo (Egypt). E-mail: khaledsaad@cmrdi.sci.eg
  2. Materials Chemistry Department, Faculty of Science, Beni Suef University (Egypt)
  3. Central Metallurgical Research and Development Institute (CMRDI), P.O. Box 87, Helwan, Cairo (Egypt)
Publication Date:
OSTI Identifier:
21000623
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 42; Journal Issue: 4; Other Information: DOI: 10.1016/j.materresbull.2006.07.009; PII: S0025-5408(06)00296-0; Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ADSORPTION; CARBON DIOXIDE; CARBON MONOXIDE; CATALYSTS; CHEMICAL PREPARATION; COPRECIPITATION; FERRITES; IRON OXIDES; MICROSTRUCTURE; NANOSTRUCTURES; OXIDATION; POWDERS; QUADRUPOLES

Citation Formats

Abdel Halim, K.S., Khedr, M.H., Nasr, M.I., and El-Mansy, A.M. Factors affecting CO oxidation over nanosized Fe{sub 2}O{sub 3}. United States: N. p., 2007. Web. doi:10.1016/j.materresbull.2006.07.009.
Abdel Halim, K.S., Khedr, M.H., Nasr, M.I., & El-Mansy, A.M. Factors affecting CO oxidation over nanosized Fe{sub 2}O{sub 3}. United States. doi:10.1016/j.materresbull.2006.07.009.
Abdel Halim, K.S., Khedr, M.H., Nasr, M.I., and El-Mansy, A.M. Thu . "Factors affecting CO oxidation over nanosized Fe{sub 2}O{sub 3}". United States. doi:10.1016/j.materresbull.2006.07.009.
@article{osti_21000623,
title = {Factors affecting CO oxidation over nanosized Fe{sub 2}O{sub 3}},
author = {Abdel Halim, K.S. and Khedr, M.H. and Nasr, M.I. and El-Mansy, A.M.},
abstractNote = {Nanocrystallite iron oxide powders with different crystallite sizes were prepared by co-precipitation route. The prepared powders with crystallite size 75, 100 and 150 nm together with commercial iron oxide (250 nm) were tested for the catalytic oxidation of CO to CO{sub 2}. The influence of different factors as crystallite size, catalytic temperature and weight of catalyst on the rate of catalytic reaction was investigated using advanced quadrupole mass gas analyzer system. It can be reported that the rate of conversion of CO to CO{sub 2} increased by increasing catalytic temperature and decreasing crystallite size of the prepared powders. The experimental results show that nanocrystallite iron oxide powders with crystallite size 75 nm can be recommended as a promising catalyst for CO oxidation at 500 deg. C where 98% of CO is converted to CO{sub 2}. The mechanism of the catalytic oxidation reaction was investigated by comparing the CO catalytic oxidation data in the absence and presence of oxygen. The reaction which was found to be first order with respect to CO is probably proceeded by adsorption mechanism where the reactants are adsorbed on the surface of the catalyst with breaking O-O bonds, then CO pick up the dissociated O atom forming CO{sub 2}.},
doi = {10.1016/j.materresbull.2006.07.009},
journal = {Materials Research Bulletin},
number = 4,
volume = 42,
place = {United States},
year = {Thu Apr 12 00:00:00 EDT 2007},
month = {Thu Apr 12 00:00:00 EDT 2007}
}