# US 7,611,685 B2 · Method for hydrogen sulphide and/or mercaptans decomposition

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- Number: US 7,611,685 B2
- Document ID: US7611685B2
- Status: Granted
- Kind: B2
- Application number: 10/594,647
- Filed: 2005-03-31
- Published: 2007-12-20
- Granted: 2009-11-03
- Earliest claimed: 2004-04-01
- Assignees: Institu Kataliza Imeni G. K. Boreskova Sibirskogo Otdeleniya Rossiiskoi Akademii Nauk
- Inventors: Anatolii Nikolaevich Startsev; Anastasia Viktorovna Pashigreva; Olga Valeryevna Voroshina; Ivan Ivanovich Zakharov; Valentin Nikolaevich Parmon
- Web page: https://patentgrep.com/patent/US7611685B2

## CPC

- C01B 17/0495: {by dissociation of hydrogen sulfide into the elements}
- B01D 53/485: {containing only one sulfur compound other than sulfur oxides or hydrogen sulfide}
- B01D 53/52: Hydrogen sulfide
- C01B 3/04: by decomposition of inorganic compounds (reversible storage of hydrogen C01B3/0018)
- B01D 2257/306: Organic sulfur compounds, e.g. mercaptans
- Y02E 60/36: Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
- Y02P 20/584: Recycling of catalysts
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

The inventive method for hydrogen sulphide and/or mercaptans decomposition consists in passing hydrogen sulphide and/or mercaptan-containing gas at a temperature less than 200° C. through a hard material layer (catalyst) which decomposes said hydrogen sulphide or mercaptans in such a way that hydrogen or hydrocarbons are released and sulphur-containing compounds are formed on a material surface. Said hard material is placed in a liquid medium layer. Said invention makes it possible to use a hard material (catalyst) without a periodical regeneration thereof.

## Claims

### Claim 1

A method for producing hydrogen and sulphur from a gas containing hydrogen sulphide and/or a mercaptan, said method comprising passing said gas at a temperature lower than 150° C. through a layer of a solid material capable of decomposing hydrogen sulphide and/or mercaptans with isolation of hydrogen or hydrocarbons and formation of sulfur-containing compounds on the surface of the material, characterized in that said solid material is placed in a layer of a liquid phase substance which is capable of dissolving intermediate reaction products and/or sulphur forming on the surface of the solid material.

### Claim 2 (depends on 1)

The method as claimed in claim 1, wherein said gas is passed at a temperature of 75° C. or below.

### Claim 3 (depends on 1)

The method as claimed in claim 1, wherein said liquid phase substance is selected from the group consisting of hydrocarbons, carbon disulphide, water, organic acids, inorganic acids, surfactant solutions and mixtures thereof.