Chemistry: analytical and immunological testing – Oxygen containing – Molecular oxygen
Reexamination Certificate
2008-03-17
2011-10-18
Warden, Jill (Department: 1773)
Chemistry: analytical and immunological testing
Oxygen containing
Molecular oxygen
C436S037000
Reexamination Certificate
active
08039265
ABSTRACT:
The oxygen content of metal species in a heterogeneous catalyst is determined using volumetric adsorption measurements. Such measurements are employed to quantify the amount of reduction gas that it takes to reduce metal species of a catalyst sample, and the oxygen content is derived from this amount and the reaction stoichiometry. This method can be applied to mono-metallic and multi-metallic heterogeneous catalysts and has been shown to provide at least 10 times better detection sensitivity than typical TCDs in TPR-TCD methods.
REFERENCES:
patent: 4729824 (1988-03-01), Giner
patent: 5436165 (1995-07-01), Brenner
patent: 6306349 (2001-10-01), Moon et al.
Gruber, Hans, “Chemisorption Studies on Supported Platinum”, The Journal of Physical Chemistry 1962 66 (1), 48-54.
Brooks et al., “Chemisorption of carbon monoxide on metal surfaces by pulse chromatography”, Analytical Chemistry 1969 41 (1), 103-106.
Hoang-Van et al., “Hydrogen-Oxygen Titration and Carbon Monoxide Chemisorptiopn for the Measurement of Supported Palladium Surface Areas”, React. Kinet. Catal. Lett., vol. 13, No. 1, 63-67 (1980).
Szymura, “Effects of Reduction Temperature on H2 Adsorption by Pt on Various Supports”, Strong Metal-Support Interactions. Feb. 10, 1986, 169-181.
Bergeret, G. et al., “Metal Particle Size and Dispersion Measurements,”Handbook of Heterogeneous Catalysis, vol. 2, pp. 439-442, Wiley-VCH (1997).
Morlang, A, et al., “Bimetallic Pt/Pd Diesel Oxidation Catalysts—Structural Characterisation and Catalytic Behaviour,”Applied Catalysis B: Environmental 60, pp. 191-199 (2005).
Baraldi, A., “Real-time X-ray Photoelectron Spectroscopy of Surface Reactions,”Surface Science Report 49, pp. 169-224 (2003).
Hansen, E. et al., “First-Principles Based Kinetic Simulations of Acetic Acid Temperature Programmed Reaction on Pd(111),” J. Phys. Chem. B, 105, pp. 9218-9229 (2001).
Meier, Mike, “Crystallite Size Measurement Using X-Ray Diffraction,” Department of Chemical Engineering and Materials Science, University of California, Davis, Sep. 13, 2004, pp. 1-6.
Webb, Paul A., “Introduction to Chemical Adsorption Analytical Techniques and their Application to Catalysis,” Micromeritics Instrument Corp./MIC Technical Publications, Jan. 2003, pp. 1-12.
Micromeritics Product Brochure, “ChemiSorb Series—Chemisorption Analyzers,” http://www.micromeritics.com/pdf/products/ChemiSorb—Brochure.pdf, pp. 1-8, (2004).
Lassi, Ulla, “Deactivation Correlations of PD/RH Three-Way Catalysts Designed for EURO IV Emission Limits,” University of Oulu Press (dissertation), Feb. 28, 2003, pp. 1-136.
Tsud, N. et al., “CO Adsorption on Palladium Model Catalysts: XPS Pd—Al2O3Interaction Study,” Surface Science 467, pp. 169-176 (2000).
Wertheim, G. K. et al., “Noble and Transition-Metal Clusters: The D Bands of Silver and Palladium,” PhysicalReview B, vol. 33(8), pp. 5384-5390 (1986).
Ottens, A. K. et al., “Real-Time Quantitative Analysis of H2, He, 02and Ar by Quadrupole Ion Trap Mass Spectrometry”, J. Am. Soc. Mass Spectrom 13, pp. 1120-1128 (2002).
Graham, J. D. et al., “Interaction of Hydrogen Chloride with an Ultrathin Ice Film: Observation of Adsorbed and Absorbed States,” J. Phys. Chem., 98, pp. 5974-5983 (1994).
Wang, C-B et al., “Effects of the Addition of Titania on the Thermal Characterization of Alumina-supported Palladium”, Journal of Molecular Catalysis A: Chemical 180, pp. 285-291 (2002).
Patnaik, P., “Dean's Analytical Chemistry Handbook,” 2nd Edition, McGraw Hill Companies 2004, p. 5.47.
Lowell, S. et al. “Characterization of Porous Solids and Powders: Surface Area, Pore Size and Density,” Chapter 16, pp. 283-296, Kluwer Academic Publishers, 2004.
Ragaini, V. et al., “Dispersion Measurement by the Single Introduction Method Coupled With the Back-Sorption Procedure: A Chemisorption and TPD Study of the Different Chemisorbed Hydrogen Species,” Journal of Catalysis 146, pp. 116-125 (1994).
Benson, J. E. et al., “Hydrogen-Oxygen Titration Method for the Measurement of Supported Palladium Surface Areas,” Journal of Catalysis 30, pp. 146-153 (1973).
Leon y Leon, C. A. et al., “Adsorption and Catalytic Properties of Pd/Si02, Cu/Si02and Pd-Cu/Si02Systems—I. Hydrogen, Carbon Monoxide and Oxygen Adsorption on Pd/Si02and Cu/Si02,” Applied Catalysis 69, pp. 269-290 (1991).
Chafik, T. et al., “Heat of Adsorption of Carbon Monoxide on a Pt/Rh/CeO2/Al2O3Three-Way Catalyst Using In-Situ Infrared Spectroscopy At High Temperatures,” Journal of Catalysis 179, pp. 503-514 (1998).
Dropsch, H. et al., “CO Adsorption on Supported Pd Catalysts Studied by Adsorption Microcalorimetry and Temperature Programmed Desorption”, Applied Catalysis A: General 158, pp. 163-183 (1997).
Cai Juan
Fujdala Kyle L.
Larsson Mats I.
Cole Monique
Nanostellar, Inc.
Patterson & Sheridan LLP
Warden Jill
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