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Set-Up For Production Of Hydrogen Gas By Thermo-Chemical Decomposition Of Water Using Steel Plant Slag And Waste Materials

a technology of thermo-chemical decomposition and water, applied in the direction of molten salt/metal gasification, energy input, chemistry apparatus and processes, etc., can solve the problems of significant higher cost of hydrogen produced using this method, and most commercial hydrogen production processes are not considered renewable, so as to achieve simple and cost-effective effects

Inactive Publication Date: 2011-02-03
TATA STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This method effectively generates hydrogen gas with high efficiency, producing approximately 10 liters per kg of slag, achieving a hydrogen yield of >35% using waste heat, and demonstrates a cost-effective and distributed approach to hydrogen production.

Problems solved by technology

However, most of the commercial hydrogen production processes are not considered as renewable as these technologies merely shift the source of pollution from a distributed one (like cars, households for example) to a more concentrated source like a hydrogen producing plants or thermal power plants.
The cost of hydrogen produced using this method is significantly higher and hence, it is used only in specialty applications like semiconductor manufacture.

Method used

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  • Set-Up For Production Of Hydrogen Gas By Thermo-Chemical Decomposition Of Water Using Steel Plant Slag And Waste Materials
  • Set-Up For Production Of Hydrogen Gas By Thermo-Chemical Decomposition Of Water Using Steel Plant Slag And Waste Materials
  • Set-Up For Production Of Hydrogen Gas By Thermo-Chemical Decomposition Of Water Using Steel Plant Slag And Waste Materials

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Embodiment Construction

[0020]A novel method is developed for production of hydrogen gas by water and slag reactions in presence of carbonaceous waste materials and catalytic fluxes. The overall reaction of hydrogen gas formation is:

[0021]Where A is amount of water added in the system, x is amount of C available in the flux, y is FeO in the slag and z formation of CO2 by reaction between CO and water. In this novel process, slag not only provides sensible heat for endothermic water decomposition reaction but also arrest the reverse reactions between hydrogen and oxygen gas. The Fe and lower oxides of Fe in the slag react with oxygen gas in the product gas mix and form Fe2O3 and thereby reduce the thermodynamic activity of oxygen. Different types of wastes, which can act as a deoxidizer, can be used as a flux to improve the production of hydrogen gas.

Thermal Decomposition of Pure Water in Presence of Slag:

[0022]The sensible heat of molten slag can be used for the thermo-chemical decomposition of water. In t...

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Abstract

A system for producing hydrogen gas by the thermo-chemical decomposition of water, comprising a graphite crucible containing molten slag, a reaction hood disposed over the crucible, a water line for spraying water on the molten slag, and a steel tube for collecting and transferring the produced hydrogen gas from the hood to a condenser tank.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application is a divisional application of co-pending U.S. application Ser. No. 11 / 922,955, filed on Dec. 27, 2007, which is the United States national stage filing under 35 U.S.C. §371 of International Application No. PCT / 1N2006 / 000198, filed on Jun. 13, 2006, both of which are incorporated by reference herein in their entirety.BACKGROUND OF THE INVENTION[0002]1. Field of Invention[0003]This invention relates to a novel method of generating hydrogen gas from water.[0004]2. Description of Related Art[0005]Hydrogen is emerging as the favorite alternative to fossil fuels. Presently, hydrogen is primarily used as a feedstock, intermediate chemical, or, on a much smaller scale, a specialty chemical. Only a small portion of the hydrogen produced today is used as an energy carrier, mostly by the Aerospace industries. Automotive industries are developing new models that run on either hydrogen based internal combustion engines (ICEs), or gas...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C01B3/02
CPCC10J2300/1615C10J3/04Y02E60/364C10J3/57C01B3/042C01B3/061Y02P20/129Y02E60/36C01B3/02C01B3/14
Inventor BHATTACHARJEE, DEBASHISHMUKHARJEE, T.TATHAVADKAR, VILAS
Owner TATA STEEL