ISSN:
0001-1541
Keywords:
Chemistry
;
Chemical Engineering
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
Reaction mechanism and rates were determined from 803 to 1,073 K for the carbochlorination of Al2O3 and of Al, Si and Fe-mixed oxides using Cl2 and C slurried in a stirred melt of NaCl - AlCl3. Alumina chlorination rates of 0.33-2.0 × 10-8 kmol/s were obtained using C:melt weight ratios between 1:21 and 1:42. The reaction rate was proportional to C loading at temperatures below 923 K, while gas-liquid mass transfer was rate-controlling at higher temperatures. Carbochlorination of the combined oxides in coal fly ash at 923 K and oxide conversions less than about 50% was also gas-liquid mass-transfer-controlled. At higher conversions, dissolution became the rate-controlling factor. A 40% (molar) AlCl3 melt was more effective than a 48% AlCl3 melt for the selective chlorination of Al2O3 over SiO2.
Additional Material:
8 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/aic.690340705
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