A process for recovering sulfur in a sulfur recovery unit comprising the steps of reacting hydrogen sulfide and oxygen in the reaction furnace at a minimum reaction temperature to produce a reaction effluent; reducing the temperature of the reaction effluent from the minimum reaction temperature to a boiler section outlet temperature to produce a cooled effluent, the cooled effluent comprises hydrogen sulfide, sulfur dioxide, and sulfur-containing contaminants; reacting the hydrogen sulfide, sulfur dioxide, and sulfur-containing contaminants in the catalytic extension to produce a boiler catalytic effluent; reducing the boiler catalytic effluent temperature such that the elemental sulfur condenses to form liquid sulfur and a gases stream; reacting the hydrogen sulfide and sulfur-containing contaminants with the oxygen to produce an oxidizer outlet stream comprises sulfur dioxide; and separating the sulfur dioxide in the scrubbing unit to produce a recycle stream and an effluent gases, the recycle stream comprises sulfur dioxide.

A method of treating Atrial Fibrillation or a pre-Atrial Fibrillation condition in a mammal, preferably a human, comprising administering a therapeutically effective amount of one of organic or inorganic sulfide, organic or inorganic nitrite, both organic or inorganic sulfide and organic or inorganic nitrite, or pharmacologically acceptable salts, solvates, esters, amides, clathrates, stereoisomers, enantiomers, prodrugs or analogs thereof, or a combination thereof.

An acid gas purification system is described herein that includes a primary membrane system with a CO.sub.2- and H.sub.2S-enriched permeate stream effluent and a hydrocarbon stream effluent; a first compression stage arranged to receive the CO.sub.2- and H.sub.2S-enriched permeate stream and produce a compressed stream; and a cryogenic separation system to receive the compressed stream, the cryogenic separation system including a cooler followed by a fractionator, wherein the fractionator produces a CO.sub.2- and H.sub.2S liquid stream and a hydrocarbon gas stream.

A method of sulfur enriching an acid gas stream in an acid gas enrichment system includes: (i) feeding an acid gas stream to a contactor, the acid gas stream comprising hydrogen sulfide (H2S), carbon dioxide (CO2), and hydrocarbons; (ii) separating the acid gas stream in the contactor to create a carbon dioxide rich stream and a purified acid gas stream; (iii) feeding the purified acid gas stream to a regenerator fluidly connected to the contactor; (iv) separating the purified acid gas stream in the regenerator to create a hydrogen sulfide rich stream and a hydrogen sulfide lean stream, the hydrogen sulfide rich stream having a concentration of hydrogen sulfide; and (v) periodically feeding at least a portion of the hydrogen sulfide rich stream exiting the regenerator to the acid gas stream entering the contactor.

A process for simultaneous removal of hydrogen sulfide (H.sub.2S ) and heavy metals from mixture includes charging a contaminated aqueous composition containing heavy metal ions to a reactor. The process also includes passing a H.sub.2S -containing gas composition via a plurality of gas spargers through the contaminated aqueous composition present in the reactor to form a H.sub.2S-containing contaminated aqueous composition and a purified gas composition. The process further includes reacting the H.sub.2S from the H.sub.2S -containing contaminated aqueous composition with the heavy metal ions in the H.sub.2S -containing contaminated aqueous composition to form a metal sulfide precipitate in a metal-sulfide-containing contaminated aqueous composition. In addition, the process includes at least partially introducing the metal-sulfide-containing contaminated aqueous composition to a solid-liquid separator and removing the metal sulfide precipitate from the metal-sulfide-containing contaminated aqueous composition to form a purified aqueous composition.

Systems and methods for removing hydrogen sulfide from an ammonia stream in the NH3 purification and liquefaction stage of a conventional two-column sour water stripping system using an adsorbent bed.

The present invention relates to a method for the catalytic conversion in vapor phase of disulfide oil into methane and hydrogen sulfide, comprising the step of contacting disulfide oil, eventually in the presence of water, with a supported transition metal catalyst.

A power generation system includes a hydrogen sulfide separator, a hydrocarbon fractionator, a hydrogen sulfide processor, a methane processor, and a hydrogen power generator. The hydrogen sulfide separator separates a gaseous flowback stream into a stream including hydrogen sulfide and a stream including hydrocarbons. The hydrocarbon fractionator fractionates hydrocarbons into methane, ethane and natural gas. The hydrogen sulfide processor converts hydrogen sulfide into hydrogen and sulfur, and the methane processor converts methane into hydrogen and carbon. The hydrogen power generator reacts hydrogen with oxygen to generate electricity. A method for generating electricity from a gaseous flowback includes separating a gaseous flowback stream into a stream including hydrogen sulfide and a stream including hydrocarbons, fractionating hydrocarbons into methane, ethane and natural gas, converting hydrogen sulfide into hydrogen and sulfur, converting methane into hydrogen and carbon, and reacting hydrogen with oxygen to generate electricity.

Method and apparatus pertaining to the production of hydrogen sulfide using sodium salts recycle. Sodium sulfate is reacted with a carbon containing stream to produce sodium sulfide and carbon dioxide. The sodium sulfide is blended with elemental sulfur and water. The blend is subjected to elevated temperatures and pressures to result in the production of hydrogen sulfide and sodium sulfate. A mixing apparatus, such as a bubble column reactor, has been found to be especially useful. The hydrogen sulfide can be used for removing metal from effluents.

Systems and methods for removing hydrogen sulfide from an ammonia stream in the NH3 purification and liquefaction stage of a conventional two-column sour water stripping system using an adsorbent bed.