| 摘要 |
<p>Oxidative and reductive methods for the destruction of an ammonia-bearing gas stream, potentially containing minor but significant quantities of hydrogen sulfide, in a conventional Claus sulfur recovery tail gas treating unit are described, using controlled rates and compositions of combustion gases in order to obtain the temperatures necessary for the desired destruction of unwanted combustibles. The oxidative process may comprise thermal oxidation of ammonia, while the reductive process includes introduction of a hydrocarbon-containing gas for combustion. The waste stream generated may then be passed through a hydrogenation reactor to convert SO2 and Sx to H2S by catalytic hydrogenation, to convert COS and CS2 to CO2 and H2S, and to convert CO to CO2 and H2. The H2S generated may then be recovered.</p> |
