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Method for hydrogen production

A technology for preparing hydrogen and carbon dioxide, which is applied in the field of hydrogen production and can solve problems such as unfavorable energy efficiency

Inactive Publication Date: 2013-10-02
STAMICARBON ACTING UNDER THE NAME OF MT INNOVATION CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, all commercial CO 2 Capture plants all employ methods based on chemical absorption using amine solvents such as monoethanolamine (MEA) or (methyldiethanolamine) MDEA, which is an important energy-intensive step and thus detrimental to the overall process energy efficiency

Method used

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  • Method for hydrogen production

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Embodiment Construction

[0026] The present invention broadly aims at reducing GHG emissions in a steam reforming process for hydrogen production by separating the resulting carbon dioxide during the process and using it as a heat exchange medium. In particular, the carbon dioxide gas produced in the reforming reaction is purified and heated, wherein heating is preferably performed using heat from a nuclear reactor. The purified and heated carbon dioxide is then used to supply heat to one or more reforming reactors and other process streams.

[0027] Carbon dioxide can also be obtained as a product by the process of the invention. Thus, in another aspect, the invention relates to a method of producing carbon dioxide.

[0028] In particular, in yet another aspect, the invention relates to the production of both hydrogen and carbon dioxide.

[0029] The first step of the method according to the invention is to provide fossil fuel and water vapour. Fossil fuels here are to be understood as carbon-cont...

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Abstract

The invention relates to the production of hydrogen by steam reforming comprising the steps of (i) providing a fossil fuel, preferably methane, and steam, (ii) conducting a steam reforming reaction between the fossil fuel and the steam under heating, wherein a reaction mixture is formed comprising hydrogen and carbon dioxide, (iii) separating hydrogen from the reaction mixture by membrane separation, wherein a permeate is formed comprising hydrogen and a retentate comprising carbon dioxide, (iv) purifying carbon dioxide from the retentate, and (v) using said carbon dioxide as a heat exchange medium to supply heat at least for the steam reforming reaction (ii). The method of the invention can also be used for the production of pressurised carbon dioxide characterised by a high purity. Further, the invention relates to a system for hydrogen production and to the use of pressurised carbon dioxide as heat exchange medium.

Description

technical field [0001] The present invention relates to the field of hydrogen production, and more particularly to the production of hydrogen by steam reforming of hydrocarbons, such as fossil fuels. Background technique [0002] Fossil fuel steam reforming is currently the most common commercial method for hydrogen production. In this process, light hydrocarbons such as methane are reacted with water vapor at 850 to 880 °C and at pressures in the range of 15 to 30 bar to form so-called synthesis gas (syngas), i. 2 ) and carbon monoxide (CO). Carbon monoxide reacts with water vapor to form carbon dioxide (CO 2 ) and hydrogen (water gas shift reaction). [0003] Due to the high processing temperature, the thermal efficiency of the process is about 65 to 75%. In addition, a large amount of greenhouse gases (GHG) such as CO produced together with hydrogen are also emitted 2 . Furthermore, in order to maintain the overall endothermic balance of the steam reforming reaction...

Claims

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Application Information

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IPC IPC(8): C01B3/38C01B3/50C01B31/20C01B32/50
CPCC01B3/38C01B3/505C01B2203/1241C01B2203/127C01B2203/0475C01B2203/0805C01B2203/0233C01B2203/0405C01B3/382C01B3/503C01B2203/041C01B2203/043C01B2203/06C01B2203/0833C01B2203/0844C01B2203/1064C01B2203/1082C01B2203/1235C01B2203/1294C01B2203/142C01B2203/143C01B2203/147
Inventor 加埃塔诺·亚夸涅洛安纳里塔·萨拉迪尼
Owner STAMICARBON ACTING UNDER THE NAME OF MT INNOVATION CENT
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