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  • Chemical Engineering  (1)
  • Gas separation  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Ag+ contained complex membrane for the separation of C4 olefin/paraffin mixture (1994)
    Springer
    Journal of polymer research 1 (1994), S. 35-41 
    Details
    ISSN: 1572-8935
    Keywords: Olefin/paraffin separation ; Permeation ; Gas separation ; Complex membrane ; Facilitating effect
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The C4 olefin/paraffin mixture was separated by means of the PE modified reversible complexing membrane, polyethylene-g-acrylic acid-Ag+(PE-g-AA-Ag+). The olefin could be transported to the other side of the membrane by silver facilitating phenomenon owing to the formation of (Ag-olefin)+ complex. The SEM-EDX spectrum showed a homogeneous silver ion distribution across the dense complex membrane's cross-section at higher than about 60% grafting. The gas permeation properties measured by a gas chromatographic method implied a silver ions facilitating effect towards olefin. At 30°C and 111.7% grafting, the complex membrane exhibited a trans-2-butene/isobutane selectivity of 12.5 and a cis-2-butene/isobutane selectivity of 9.2. The permeation activation energy of the C4 olefins became lower than that of C4 paraffin as a result of the silver ions facilitated effect. The cis-2-butene has a significant higher complex equilibrium constant than that of the trans-2-butene in complexing with the complex membrane.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01378592
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  • 2
    Electronic Resource
    Electronic Resource
    Numerical model for the vacuum pyrolysis of scrap tires in batch reactors (1995)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 41 (1995), S. 1500-1512 
    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 quantitative model for scrap tire pyrolysis in a batch scale reactor developed comprises the following basic phenomena: conduction inside tire particles; conduction, convection, and radiation between the feedstock particles or between the fluids and the particles; tire pyrolysis reaction; exothermicity and endothermicity caused by tire decomposition and volatilization; and the variation of the composition and the thermal properties of tire particles. This model was used to predict the transient temperature and density distributions in the bed of particles, the volatile product evolution rate, the mass change, the energy consumption during the pyrolysis process, and the pressure histoiy in a tire pyrolysis reactor with a load of 1 kg. The model predictions agree well with independent experimental data.
    Additional Material: 15 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690410614
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