METHOD FOR QUALITY IMPROVEMENT OF NATURAL GAS WITH HIGH CONTENT OF HYDROGEN SULPHIDE Russian patent published in 2014 - IPC C01B3/34 C01B3/38 

FIELD: oil and gas industry.

SUBSTANCE: invention is related to a treatment method of natural gas with high content of hydrogen sulphide. The quality improvement method for superacid natural gas with a hydrogen sulphide content equal to or higher than 60 v% with hydrogen production includes the flowing stages: a) delivery of superacid natural gas to the reformer functioning at a temperature within the range of 900-1500°C and under atmospheric pressure or under pressure a little bit less than the atmospheric one, in order to produce a mixture consisting in essence of carbon disulphide (CS₂) and hydrogen (H₂); b) cooling of the reaction products, separation of carbon disulphide from the remaining reaction mixture containing hydrogen and extraction of hydrogen; c) combustion of carbon disulphide with acid-containing gas at high temperature in order to produce a gas mixture consisting in essence of CO₂ and SO₂; d) delivery of at least a part of hot gases formed in result of carbon disulphide combustion to the reforming stage as a heat source to maintain the endothermic reaction at the stage (a); and e) delivery of gaseous products of carbon disulphide combustion with products received at the stage (d) as intermediate products for downstream chemical synthesis or for their removal by means of injection to specific geologic structures.

EFFECT: production of useful products, in particular, of hydrogen, out of natural gas extracted from superacid gas fields.

7 cl, 1 dwg, 1 ex