Process of conversion sulfur compounds to elemental sulfur by using direct reduction and oxidation catalysts in Claus units
OwnerMahin Rameshni, Stephen L. Santoinventors
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Abstract
Processes are for the conversion of the sulfur compounds to elemental sulfur through different catalytic stages after the reaction furnace of the Claus unit with air or oxygen. The steps are: 1—Conventional Claus thermal or catalytic stage; 2—Oxygen Scavenger catalytic stage to capture excess oxygen from the reaction furnace and to perform Claus reaction; a Selective Reduction stage that converts SO2 to elemental sulfur; and 4—Selective Oxidation stage that converts H2S to elemental sulfur. The tail gas flows to the incineration and stack and to the incineration plus caustic scrubber for achieving zero emissions.
Claims20
A process for the production of sulfur from sulfur compounds containing acid gases streams, the process comprising the following 4 steps:
- A—step 1) The process comprises a thermal stage(s) (reaction furnace stages) of the Claus Unit with air, enriched air or oxygen enrichment operation;
- B—step 2) The process comprises at least one catalytic stages containing oxygen scavenger catalyst to capture the excess oxygen from the first step, plus at least one Claus catalysts to perform the Claus reaction;
- C—step 3) The process comprises at least one catalytic stage containing the reduction catalyst for conversion of SO2 to sulfur and;
- D—step 4) The process comprises at least one catalytic stage containing the oxidation catalyst for conversion of H2S to sulfur by mixing air, enriched air or oxygen to the process gas entering the reactor.
Dependencies are inferred from the claim text.