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  • 1
    Electronic Resource
    Electronic Resource
    Depressurization of natural gas hydrates in berea sandstone cores (1990)
    Springer
    Journal of inclusion phenomena and macrocyclic chemistry 8 (1990), S. 71-88 
    Details
    ISSN: 1573-1111
    Keywords: Depressurization ; dissociation ; gas hydrate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract D. W. Davidsonet al. [7] were among the first to recognize significant deposits of natural gas clathrate hydrates in the Western Hemisphere. This work discusses the recovery of gas from such deposits, through laboratory measurement and modeling of a depressurization scheme. The work provides a determination of the volume of gas produced and the position of the hydrate interface, as a function of time when a hydrate-containing core is depressurized. A moving boundary model is shown to provide a satisfactory fit to hydrate dissociation measurements. Qualitative information is provided concerning hydrate formation in Berea Sandstone cores.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01131289
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Damage to ZnS films due to nitrogen ion bombardment (1988)
    Springer
    Journal of materials science 23 (1988), S. 2403-2406 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The effect of nitrogen ion bombardment on vacuum-deposited ZnS films was investigated by structural and optical techniques. Films, deposited on freshly cleaved mica, have a wurtzitetype hexagonal lattice. The film thickness is reduced by the sputtering of the surface layers by the bombarding ions. Under severe ion bombardment, thermal spikes may possibly lead to melting and recrystallization.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01111895
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Theory and measurement of hydrate dissociation (1987)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 33 (1987), S. 747-752 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Experimental data on the rate of dissociation of methane hydrates are presented. The data were obtained from hydrate mass loss measurements using an electrobalance. A resistance heater with a known heat flux was used in the dissociation experiments. A mathematical model describing the dissociation process is also presented. The model, based upon first principles, assumes that the water formed during dissociation is blown away by the methane gas produced so that the dissociation process may be regarded as a moving-boundary ablation problem. Agreement between the model and the data is within 10%.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690330507
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Heat and mass transfer during the dissociation of hydrates in porous media (1989)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 35 (1989), S. 1049-1052 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690350620
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Sedimentation of multisized particles in concentrated suspensions (1983)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 29 (1983), S. 1029-1038 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A model is developed for predicting the sedimentation velocity in suspensions of multisized nonflocculating solids, in which the retarding effect of the smaller particles on the setting velocities of the larger ones is taken into account. Tests of the model, and comparisons with other models, demonstrate that it provides improved prediction of data on suspensions comprising both discrete particle size mixtures and continuous size distributions, and that it is applicable to continuous countercurrent solid-liquid operations.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690290623
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    Paper (German National Licenses)
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