Process for the production of activated coke for simultaneous desulfurization and denitrification
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United States of America Patent
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Nov 24, 1998
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app pub date -
Aug 11, 1997
filing date -
Nov 19, 1993
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Abstract
Disclosed is a process for the production of high-strength activated coke for desulfurization and denitrification. The process comprises forming a mixture of plural coals of different caking properties and a binder, said mixture containing said coal of higher caking property in an amount of 10-50 wt. %, subjecting the thus-formed mixture to oxidization treatment in an atmosphere having an oxygen concentration of 1-18 vol. % and a temperature of 50.degree.-250.degree. C., subjecting the thus-treated mixture to carbonization treatment under conditions of an oxygen concentration not higher than 8 vol. %, a heating efficiency of 10.degree.-50.degree. C./min and a final temperature 600.degree.-900.degree. C., and then subjecting again the thus-carbonized mixture to oxidation treatment at an oxygen concentration of 3-18 vol. % and a temperature of 200.degree.-600.degree. C. By treating the resultant high-strength activated coke for desulfurization and denitrification further with concentrated sulfuric acid, a coke which is inherently equipped with high denitrification activity can be obtained.
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