Reactor system and method thereof for degassing sulfur

1 . A method of degassing hydrogen sulfide in a liquid sulfur, the method comprising:

providing through a first inlet of a reactor a first stream including the liquid sulfur, wherein the first stream comprises no more than about 600 ppm, by weight, hydrogen sulfide;

providing through a second inlet of the reactor a second stream of oxygen-containing gas with about 0.0001% to about 2%, by weight, nitrogen and no more than about 28 vol. % oxygen;

generating an off-gas stream from the reactor;

passing the off-gas stream from the reactor to a sulfur recovery zone;

removing at least a portion of sulfur compounds in the off-gas stream to generate a tail gas stream;

treating the tail gas stream in a tail gas treatment zone to generate a treated tail gas stream comprising carbon dioxide and water;

purifying the carbon dioxide in the treated tail gas stream in a carbon dioxide conditioning zone to produce a stream comprising carbon dioxide; and

providing carbon dioxide from the stream to the second inlet,

wherein the second stream comprises a stream comprising carbon dioxide from the carbon dioxide conditioning zone and a stream comprising oxygen from the sulfur recovery zone.

2 . The method of claim 1 , wherein the first stream comprises no more than about 400 ppm, by weight, hydrogen sulfide.

3 . The method of claim 1 , wherein the second stream comprises a Claus tail gas stream from the sulfur recovery zone.

4 . The method of claim 1 , wherein the second stream comprises oxygen and carbon dioxide.

5 . The method of claim 1 , wherein the second stream comprises no more than about 1%, by weight, nitrogen.

6 . The method of claim 1 , wherein the second stream comprises about 0.0001% to about 0.001%, by weight, nitrogen.