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Type of Document	Dissertation
Author	Vasilakos, Nikolaos Petrou
URN	etd-09192006-130811
Persistent URL	http://resolver.caltech.edu/CaltechETD:etd-09192006-130811
Title	Coal desulfurization by selective chlorinolysis
Degree	PhD
Option	Chemical Engineering
Advisory Committee	Advisor Name Title William Harrison Corcoran Committee Chair
Keywords	none
Date of Defense	1980-10-30
Availability	restricted
Abstract The desulfurization of coal by selective oxidation under slurry-phase chlorination conditions was investigated. Chemical reaction was found to be the rate-controlling step in carbon-tetrachloride chorination at 25°C for coal particles less than 150 µ in diameter. For larger particle sizes, a transition from chemical to intraparticlemass-transfer control was observed. The nitrogen-surface area of the coal decreased significantly as a result of the chlorination reaction. The reaction mechanism and the desulfurization patterns of chlorinolysis were studied under model-reaction and coal-chlorination conditions. Possible complete desulfurization schemes were considered. The role of solvents both in increasing the efficiency of the coal treatment and in providing alternative paths for coal beneficiation processes was also examined. The results of this study were interpreted within the frame of the solubility-parameter theory, utilizing the new experimental technique of solubility-parameter spectroscopy.
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