| 摘要 |
An improved process is provided for the removal of sulfur oxides from gas or vapor media containing oxygen and H2O by contacting the media with a catalytically-active carbonaceous char. The improvement is provided by the use of a catalytically-active carbonaceous char prepared by low-temperature carbonization and oxidation of a bituminous coal or bituminous material at temperatures below 700 DEG C., followed by contact of the carbonized, oxidized char with one or more nitrogen-containing compounds at a temperature which is stable at, or is increasing to, temperatures less than 700 DEG C., and then increasing the temperature of the resultant material to or above 700 DEG C.
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