The present invention relates to a method for removing sulphur dioxide from gaseous effluent, wherein a mixture of gaseous outlet gasses or gaseous effluent includes sulphur dioxide and carbon monoxide, and wherein, to perform a catalytic reduction, a catalyst is used to catalyze a reaction between carbon monoxide and sulphur dioxide to produce carbon dioxide and sulphur.

A process and apparatus for recovering sulphur from a hydrogen sulphide containing gas stream are disclosed. A gas stream containing hydrogen sulphide gas is passed into an apparatus having a first thermal-reaction-region and a first catalytic region and reacting a portion of the hydrogen sulphide gas to sulphur dioxide and water and reacting a further portion to form sulphur vapor and water vapor to form a resultant-gas-mixture of water vapor, sulphur vapor, sulphur dioxide and hydrogen sulphide and passing a portion to the first catalytic-region whereby at least a portion of the hydrogen sulphide is reacted in the presence of a catalyst to form further sulphur vapor and water vapor and condensing at least a portion of sulphur vapor to form liquid sulphur and passing at least a portion of the liquid sulphur to a sulphur pit.

Compositions and methods for the removal of hydrogen sulfide, vapor phase thiols, carbonyl sulfide, and combinations thereof, from gas/vapor streams are provided through the utilization of a regenerable formulated media. The compositions may include a bound complex treated-activated carbon media (BCT-AC media). The compositions and methods provide advantages over current known technologies by reducing the number of required process steps and resulting reduction in capital and operating costs, as well as elimination of aqueous phase processes that are expensive to operate and generate unwanted waste by products. Additionally, the compositions and methods provided remove hydrogen sulfide as recoverable elemental sulfur and are ideally suited for gas/vapor phase applications where carbon dioxide may be present as it has no process or economic impact on the compositions or methods.

A method to recover sulfur comprising the steps of feeding an acid gas stream to a combustion furnace, condensing the cooled furnace stream to produce a first gas stream, feeding the first gas stream to a first adsorber comprises a molecular sieve, feeding the first hot dry gas stream to a first catalytic reactor, cooling the first catalytic outlet stream in a first condenser, feeding the second gas stream to a second adsorber, feeding the second hot dry gas stream to a second catalytic reactor, cooling the second catalytic outlet stream in a second condenser, introducing the third gas stream to a third adsorber, feeding the third hot dry gas stream to a third catalytic reactor to produce a third catalytic outlet stream, and cooling the third catalytic outlet stream in a third condenser to produce a third sulfur stream and a tail gas stream.

A method to recover sulfur comprising the steps of feeding an acid gas stream to a combustion furnace, condensing the cooled furnace stream to produce a first gas stream, feeding the first gas stream to a first adsorber comprises a molecular sieve, feeding the first hot dry gas stream to a first catalytic reactor, cooling the first catalytic outlet stream in a first condenser, feeding the second gas stream to a second adsorber, feeding the second hot dry gas stream to a second catalytic reactor, cooling the second catalytic outlet stream in a second condenser, introducing the third gas stream to a third adsorber, feeding the third hot dry gas stream to a third catalytic reactor to produce a third catalytic outlet stream, and cooling the third catalytic outlet stream in a third condenser to produce a third sulfur stream and a tail gas stream.

A method to recover sulfur comprising the steps of feeding an acid gas stream to a combustion furnace, condensing the cooled furnace stream to produce a first gas stream, feeding the first gas stream to a first adsorber comprises a molecular sieve, feeding the first hot dry gas stream to a first catalytic reactor, cooling the first catalytic outlet stream in a first condenser, feeding the second gas stream to a second adsorber, feeding the second hot dry gas stream to a second catalytic reactor, cooling the second catalytic outlet stream in a second condenser, introducing the third gas stream to a third adsorber, feeding the third hot dry gas stream to a third catalytic reactor to produce a third catalytic outlet stream, and cooling the third catalytic outlet stream in a third condenser to produce a third sulfur stream and a tail gas stream.

A process for removing sulfur from a gas containing sulfur compounds as H2S, SO2, COS, CS2 . . . , in a quantity of up to 15% wt; particularly gases emanating from the Claus process: A first hydrogenation of the sulfur compounds into H2S, the hydrogenation gas being used to regenerate a deactivated bed of oxidation catalyst, both being carried out at 200-500 C. After sulfur removal, the resulting gas undergoes a second hydrogenation step and then a direct oxidation step, said step being operated under the dew point of sulfur to trap the formed sulfur in the catalyst. In the further cycle, the gas streams are switched so as to regenerate the catalyst in run which is deactivated.

A process for production of elemental sulfur from a feedstock gas including from 15% to 100 vol % H2S and a stream of sulfuric acid, the process including: a) providing a Claus reaction furnace feed stream substoichiometric oxygen with respect to the Claus reaction, b) directing to a reaction furnace zone operating at elevated temperature such as above 900 C., c) directing to a sulfuric acid evaporation zone downstream said reaction furnace zone, d) cooling to provide a cooled Claus converter feed gas, e) directing to contact a material catalytically active in the Claus reaction, f) withdrawing a Claus tail gas and elemental sulfur, g) directing to a Claus tail gas treatment plant, with the associated benefit of a process involving injection of sulfuric acid in a sulfuric acid evaporation zone allowing high temperature combustion of said feedstock gas, including impurities, without cooling from evaporation and decomposition of sulfuric acid.