Sulfur Recovery Unit to Convert Hydrogen Sulfide to Elemental Sulfur
AssigneeSaudi Arabian Oil Company
InventorsBader Inad Alotaibi, Abdullah Alarifi, Ahmad Almousa, Abdullah Alhumaid
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Abstract
A sulfur recovery unit (SRU) and method including converting hydrogen sulfide to elemental sulfur via the SRU having a reaction furnace and three catalytic reactors including a first catalytic reactor, a second catalytic reactor, and a third catalytic reactor disposed operationally in series, wherein catalyst in the first catalytic reactor consists of alumina catalyst, and wherein catalyst in the second catalytic reactor consists of a first layer of alumina catalyst, a second layer of hydrogenation catalyst, and a third layer of titania catalyst.
Claims20
A method of operating a sulfur recovery unit (SRU), comprising:
- feeding acid gas comprising hydrogen sulfide to a reaction furnace of the SRU, wherein the SRU has a thermal stage having the reaction furnace and a catalytic section having catalytic stages consisting of three catalytic stages;
- and
- converting, via the SRU, the hydrogen sulfide into elemental sulfur and recovering the elemental sulfur, wherein converting the hydrogen sulfide into elemental sulfur via the SRU comprises converting the hydrogen sulfide into elemental sulfur in the reaction furnace and in the catalytic stages, wherein the catalytic stages include catalytic reactors consisting of a first catalytic reactor, a second catalytic reactor, and a third catalytic reactor disposed operationally in series, wherein catalyst in the first catalytic reactor consists of alumina catalyst, and wherein catalyst in the second catalytic reactor consists of a first layer of alumina catalyst, a second layer of hydrogenation catalyst, and a third layer of titania catalyst.
A method of operating a sulfur recovery unit (SRU), comprising:
- feeding acid gas comprising hydrogen sulfide to a reaction furnace of the SRU, wherein the SRU comprises a thermal section comprising the reaction furnace and a catalytic section having catalytic reactors consisting of a first catalytic reactor, a second catalytic reactor, and a third catalytic reactor operationally disposed in series, wherein the thermal section discharges hydrogen sulfide and sulfur dioxide to the catalytic section, wherein catalyst in the first catalytic reactor consists of alumina catalyst, and wherein catalyst in the second catalytic reactor consists of a first layer of catalyst that is alumina catalyst, a second layer of catalyst that is hydrogenation catalyst, and a third layer of catalyst that is titania catalyst;
- and
- converting, via the SRU, the hydrogen sulfide into elemental sulfur and recovering the elemental sulfur, wherein the hydrogen sulfide is converted into elemental sulfur in both the reaction furnace and the catalytic section.
A sulfur recovery unit (SRU) comprising:
- a thermal section comprising a reaction furnace to receive feed comprising hydrogen sulfide and perform an oxidation reaction that converts hydrogen sulfide into sulfur dioxide and a Claus reaction that converts hydrogen sulfide and sulfur dioxide into elemental sulfur;
- and
- a catalytic section to receive hydrogen sulfide and sulfur dioxide from the thermal section and perform the Claus reaction, wherein the catalytic section has catalytic stages consisting of a first catalytic stage, a second catalytic stage, and a third catalytic stage disposed operationally in series, wherein the first catalytic stage has a first catalytic reactor to directly receive the hydrogen sulfide and sulfur dioxide from the thermal section, wherein catalyst in the first catalytic reactor consists of alumina catalyst, wherein the first catalytic reactor is configured to perform the Claus reaction via the alumina catalyst, wherein the second catalytic stage has a second catalytic reactor, wherein catalyst in the second catalytic reactor consists of a first layer of alumina catalyst, a second layer of hydrogenation catalyst, and a third layer of titania catalyst disposed operationally in series.
Dependencies are inferred from the claim text.