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  • 1
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 35 (1989), S. 1115-1124 
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The continuous-lumping method is a refinement of continuous thermodynamics which does not depend upon the continuous-mixture hypothesis. The method utilizes a generalized Fourier series expansion of a functional formulation of the equilibrium relations obtained by embedding the classical discrete equilibrium equations into generalized function space. The resulting method provides an effective means of reducing the number of parameters needed to describe a many-component, complex mixture; furthermore, the method provides a straightforward means of converting the equilibrium equations to the new parameterized form. The error associated with the reduction in number of parameters can be easily estimated using the ratio convergence test for mathematical series. The theory of the method is first presented and the method is then used in an example calculation to illustrate the advantages of the method over pseudocomponent lumping and continuous thermodynamics. The method is useful particularly for mixtures described by chromatographic data.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    International Journal of Chemical Kinetics 11 (1979), S. 635-648 
    ISSN: 0538-8066
    Keywords: Chemistry ; Physical Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Rate constants for the reaction HO2 + NO2(+ M) = HO2NO2(+ M) have been obtained from direct observations of the HO2 radical using the technique of molecular modulation ultraviolet spectrometry. HO2 was generated by periodic photolysis of Cl2 in the presence of excess H2 and O2, and k1 was determined from the measured concentrations and lifetime of HO2 with NO2 present. k1 increased with pressure in the range of 40-600 Torr, and a simple energy transfer model gave the following limiting second- and third-order rate constants at 283 K: k1∞ = 1.5 ± 0.5 × 10-12 cm3/molec·sec and k1III = 2.5 ± 0.5 × 10-31 cm6/molec·sec. The ultraviolet absorption spectrum of peroxynitric acid was also recorded in the range of 195-265 nm; it showed a broad feature with a maximum at 200 nm, σmax = 4.4 × 10-18 cm2.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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