CONVERSION OF HYDROGEN SULPHIDE INTO HYDROGEN Russian patent published in 2015 - IPC B01D53/86 

FIELD: chemistry.

SUBSTANCE: invention relates to recovering hydrogen from gases. A reactor and a method of producing hydrogen from a gas stream containing hydrogen sulphide or hydrogen sulphide and carbon dioxide, according to which: a stream of said gas is fed into the chamber of a vertical reactor, wherein said reactor chamber comprises an external cylindrical shell which defines a reaction chamber, and said reaction chamber includes a heating area, a membrane and a sulphur condenser, and said reactor comprises: an inlet opening for inputting the gas stream into the reaction chamber; a heating area located in the reaction chamber and adapted for contact with said gas stream, wherein said heating area contains a catalyst selected from a group which includes azurite, malachite and a metal containing 75% nickel and 25% chromium; a membrane, which is a ceramic membrane, located in the reaction chamber, wherein said ceramic membrane is permeable to hydrogen but impermeable to hydrogen sulphide and sulphur vapour, and the passage of the stream is determined by the content of the membrane, which is linked to a first outlet opening; a sulphur condenser located in the reaction chamber below the membrane and linked to a second outlet opening; a gas outlet opening, which is linked to the reaction chamber; reacting hydrogen sulphide or, optionally, hydrogen sulphide and carbon dioxide in the heating area at 400-700°C, where hydrogen sulphide conversion is at least 95%, to obtain hydrogen and sulphur vapour and optionally water in the reaction chamber; continuously and immediately removing hydrogen through said membrane and removing the obtained hydrogen through the first outlet opening; continuously condensing sulphur vapour on the sulphur condenser to obtain sulphur in liquid form, which is removed through the second outlet opening; and removing the spent gas in the reactor from the reaction chamber through the gas outlet opening, wherein said spent gas in the reactor is substantially free of hydrogen sulphide and sulphur.

EFFECT: high efficiency of recovering hydrogen.

17 cl, 5 dwg, 1 tbl, 4 ex