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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Catalysis letters 55 (1998), S. 201-206 
    ISSN: 1572-879X
    Keywords: K–V–I catalyst ; diesel particulate ; catalytic combustion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract A K–V–I‐containing catalyst for low‐temperature combustion of carbonaceous materials was studied so as to check its potential in diesel particulate removal. X‐ray diffraction (XRD) and scanning electron microscopy (SEM‐EDS) showed that its main constituting compounds are KVO3, KI and K4V2O7. Differential scanning calorimetry (DSC) and temperature‐programmed oxidation (TPO) tests enlightened that the catalyst is active well below 400 °C (peak combustion temperature: Tp= 380 °C). Thermal treatments carried out at this temperature with dry or humid air did not entail detrimental effects on the catalyst performance. Similar treatments at higher temperatures (600 and 750 °C) resulted in a modification of the catalyst composition and in a slight decrease of its activity (Tp increases of about 60 °C). These last treatments caused the progressive loss of active components due to either evaporation of eutectic liquid formed at about 450 °C or production of gaseous iodine through a reaction between KI and KVO3, which also gave rise to the formation of K4V2O7. However, the consequent deactivation was moderate owing to the high intrinsic activity displayed by the formed potassium pyrovanadate.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 19 (1973), S. 916-922 
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Measurements were made of mass transfer coefficients with gas and liquid phase controlling resistance using a concurrent flow packed column with a wide range of operating conditions and four types of packing.Mass transfer coefficients were much larger than those obtainable in countercurrent towers.The results were correlated with dissipated energy values. The correlations obtained can be used to determine absorption efficiency. Experimental results show that the use of a high velocity concurrent flow column is particularly suitable when mass transfer is controlled by the liquid phase resistance with chemical reaction in the liquid.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 24 (1978), S. 1087-1104 
    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: 5 Ill.
    Type of Medium: Electronic Resource
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