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A method for producing hydrogen and sulphuric acid

A sulfuric acid, hydrogen technology, applied in chemical instruments and methods, hydrogen production, hydrogen, etc., can solve problems such as concentration that is not mentioned

Inactive Publication Date: 2009-11-18
OUTOTEC OYJ
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In JP 8071365 it is mentioned that this sulfuric acid will be concentrated but there is no mention of how to do it

Method used

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  • A method for producing hydrogen and sulphuric acid
  • A method for producing hydrogen and sulphuric acid
  • A method for producing hydrogen and sulphuric acid

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Embodiment Construction

[0064] A major disadvantage in the prior art methods is the huge energy requirement for the decomposition of sulfuric acid, since it consumes roughly over 60% of the thermal energy for hydrogen production, while only less than 40% is consumed in the decomposition of water. The methods described in the cited Japanese Patent Publication avoid the decomposition of sulfuric acid, however, production according to them must be carried out in connection with a sulfuric acid plant because the sulfuric acid produced as it is is not a commodity.

[0065] The invention according to the method reveals a new possibility to independently and cost-effectively produce both hydrogen and concentrated sulfuric acid (100%). In fact, the acid content of this concentrated sulfuric acid is between 97-100 wt%, although it is mentioned in this specification as 100 wt%. It is also possible to produce oleum by this method.

[0066] Some preferred process alternatives have been described according to th...

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Abstract

The invention relates to a method for producing gaseous hydrogen and strong sulphuric acid (97 - 100 wt-%) simultaneously from sulphur dioxide gas and water. Sulphur dioxide gas stream is divided into two separate sub-streams, the first sub-stream is routed for water decomposition in a partial thermochemical cycle of the hydrogen and sulphuric acid production and the second sub-stream is fed to the oxidation of the sulphur dioxide to sulphur trioxide.

Description

field of invention [0001] The invention relates to a method for simultaneously generating hydrogen and concentrated sulfuric acid from sulfur-containing raw materials. Background of the invention [0002] The increase in global energy demand and the need to control greenhouse gas emissions can lead to the introduction of a new and versatile energy carrier - hydrogen. Most of today's energy production comes from hydrocarbons: petroleum (18%), coal (30%) and natural gas (48%), only about 4% comes from electrolysis of water. The lack of exploration of fossil resources has long left only water and possibly renewable biomass as sustainable candidates for hydrogen production. [0003] Research on thermochemical water splitting cycles began about 40 years ago, and since then hundreds of technical papers have been published on them. More than 200 thermochemical cycles have been reported, and many of them have been quantitatively evaluated by computer model simulations. Search pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/06C01B17/74C01B17/88
CPCC01B3/065C01B17/76C01B17/74C01B17/54C01B17/508Y02E60/362Y02E60/36
Inventor W-C·劳泽M·加西克H·佩尔托拉P·塔斯基宁
Owner OUTOTEC OYJ
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