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  • catalyst circulation  (3)
  • hydrocarbons  (2)
  • 23.20.-G  (1)
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  • 1
    Digitale Medien
    Digitale Medien
    Reinvestigation of the decay scheme of the short-lived isomeric states in112In (1990)
    Springer
    The European physical journal 336 (1990), S. 291-296 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 23.20.-G ; 23.20.En ; 23.20.Lv
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The two short-lived isomeric states in112In have been reinvestigated by means of the112Cd(d, 2n) and109Ag (α, n) reactions. Measurements of delayed X- andγ-ray, lifetime and TDPAD spectra have been performed. A 6.32(3) keVγ-ray has been identified in the isomeric decay and anM1 multipolarity has been assigned to it on the basis of the measured internal conversion coefficients:α L =196(39) andα tot=231(35). TheE1+M2(δ =+0.24(4)) andE2 multipolarities have been determined for the 263 and 188 keV transitions deexciting the 8−(T 1/2=2.82(2) μs) and 7+ (T 1/2=0.93(2) μs) isomeric states, respectively. A revised isomeric decay scheme is presented.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01292859
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  • 2
    Digitale Medien
    Digitale Medien
    Control of the selectivity in partial oxidation of hydrocarbons (1999)
    Springer
    Reaction kinetics and catalysis letters 66 (1999), S. 47-54 
    Details
    ISSN: 1588-2837
    Schlagwort(e): Partial oxidation ; hydrocarbons ; catalyst circulation
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract A simple kinetic model for the partial oxidation of hydrocarbons on two types of sites was used to study the factors influencing the selectivity to the desired product. It is possible to increase the selectivity significantly by regulating the ratio of the surface concentrations of partial and deep oxidation sites by a periodic temperature treatment.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02475740
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  • 3
    Digitale Medien
    Digitale Medien
    Multiplicity of regimes in a dual-reactor system for partial oxidation of hydrocarbons with the catalyst unsteady state (1999)
    Springer
    Reaction kinetics and catalysis letters 67 (1999), S. 213-218 
    Details
    ISSN: 1588-2837
    Schlagwort(e): Partial oxidation ; hydrocarbons ; catalyst circulation ; multiplicity
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract A mathematical modeling of a dual-reactor system based on a simple kinetic scheme with two types of sites (accounting for deep and partial oxidation) has been performed. It has been shown that it is possible to regulate the state of a catalyst in the reaction zone by varying the rate of the catalyst circulation between the reactors, thus, significantly increasing the reaction selectivity. A region of multiplicity of the process stationary regimes has been found. This region appeared to become smaller with the increase of the catalyst circulation rate.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02475850
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  • 4
    Digitale Medien
    Digitale Medien
    Spatial regulation of the catalyst activity enhancement for catalytic reactions with stop-effect (1999)
    Springer
    Reaction kinetics and catalysis letters 68 (1999), S. 393-398 
    Details
    ISSN: 1588-2837
    Schlagwort(e): Dual-reactor system ; “stop-effect” ; catalyst circulation
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract A kinetic model taking into account two types of active sites has been used for an analysis of factors influencing the rate of a catalytic reaction. It has been shown that the reaction rate can be significantly increased by performing the reaction with the “stop-effect” in a dual-reactor system due to the catalyst circulation between two reactors, one of which is purged with an inert gas.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02475529
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