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.

The present invention discloses a hydrogen sulfide reactor vessel with an external heating system that is conductively and removably attached to an exterior portion of the reactor vessel. Also disclosed are processes for producing hydrogen sulfide utilizing the reactor vessel.

The present invention relates to a method for sulfur (S), carbon dioxide (CO2) and hydrogen (H2) recovery from a gaseous stream, the method comprising: providing a first gaseous entry stream and optionally a second gaseous entry stream, both comprising hydrogen sulfide (H2S) and CO2; a sulfur recovery step for recovering sulfur (S) from at least part of the H2S provided with the gaseous entry stream/s) to produce a liquid phase comprising sulfur (S); a CO2 recovery step for recovering at least part of the CO2 provided with the gaseous outlet stream; and an H2 recovery step (10) for recovering at least part of the H2 provided with the gaseous outlet stream.

The present invention discloses a hydrogen sulfide reactor vessel with an external heating system that is conductively and removably attached to an exterior portion of the reactor vessel. Also disclosed are processes for producing hydrogen sulfide utilizing the reactor vessel.

A process for producing hydrogen sulfide from hydrogen and elemental sulfur, comprising: bringing the sulfur into contact with a solid catalyst comprising at least one metal, chosen from metals from groups VIB and VIII of the Periodic Table of the Elements, in metal sulfide form, at a temperature ranging from 120 C. to 160 C.; circulating the mixture of sulfur and catalyst resulting from step (a) in a reaction zone, in which said mixture is brought into contact with hydrogen, the reaction zone having a temperature at the inlet point of the catalyst of greater than or equal to 150 C. and a temperature at the outlet point of the catalyst of less than or equal to 300 C., and a pressure of less than or equal to 3 bar; separating the catalyst and the gaseous effluents containing hydrogen sulfide; and recycling the catalyst to the step of bringing.

The present invention discloses a hydrogen sulfide reactor vessel with an external heating system that is conductively and removably attached to an exterior portion of the reactor vessel. Also disclosed are processes for producing hydrogen sulfide utilizing the reactor vessel.

This present invention relates to a process that can be used to create electricity, hydrogen and sulfuric acid by combining a thermodynamic cycle with electrochemical and chemical reactions

The hydrogen sulfide producing device of the present invention includes a reactor (1-3) having a liquid sulfur filling part (1-2) inside, a mantle heater (1-4) that is a first heating unit for heating liquid sulfur to produce sulfur vapor, and a hydrogen supply pipe (1-5) that is a hydrogen supply member connected to the reactor (1-3), in which an interior of the reactor (1-3) includes a catalyst support member (1-6) provided above the liquid sulfur filling part (1-2) and a heat-insulating member (1-7) provided above the catalyst support member (1-6).

An elemental sulfur recovery unit comprising a thermal unit configured to combust an acid gas feed comprising hydrogen sulfide, an oxygen source, and a fuel gas to create a reaction furnace outlet stream, comprising elemental sulfur, a waste heat boiler configured to capture heat from the reaction furnace outlet stream to create a waste heat boiler effluent, a condenser configured to condense the waste heat boiler effluent to produce a non-condensed gases stream and a condensed stream comprising elemental sulfur, a process gas reheater configured to generate a hot gases stream, a hydrogenation reactor configured to convert the hot gases stream to create a hydrogenation effluent comprising hydrogen sulfide, a process desuperheater configured to cool the hydrogenation effluent to generate a cooled effluent, and an absorber unit configured to absorb the hydrogen sulfide from the cooled effluent to produce a hydrogen sulfide recycle stream and a waste gas stream.

The present invention discloses a hydrogen sulfide reactor vessel with an external heating system that is conductively and removably attached to an exterior portion of the reactor vessel. Also disclosed are processes for producing hydrogen sulfide utilizing the reactor vessel.