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Method for producing hydrogen and apparatus for supplying hydrogen

A manufacturing method and hydrogen supply technology, applied in gas generating devices, chemical instruments and methods, hydrogen, etc., capable of solving problems such as reduced activity of metallic iron

Inactive Publication Date: 2005-08-31
UCHIYA THERMOSTAT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, only the redox of iron (Fe→FeO(Fe 3 o 4 ) → Fe) is used for the reaction method, but the reaction requires a high temperature of, for example, 600°C or higher. If oxidation and reduction are repeated, metallic iron will agglomerate, causing so-called sintering, and there is a disadvantage that the activity of metallic iron decreases rapidly.

Method used

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  • Method for producing hydrogen and apparatus for supplying hydrogen
  • Method for producing hydrogen and apparatus for supplying hydrogen
  • Method for producing hydrogen and apparatus for supplying hydrogen

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] figure 1 The outline of the reaction system of the iron compound used in this example is shown. The device shown in Fig. 1 is an atmospheric fixed bed flow-through reaction device, and a part of the reaction gas is collected and measured by a gas chromatograph.

[0032] The iron compound contained in the reaction container was prepared by the following coprecipitation method (urea method). That is, iron (III) nitrate nonahydrate (Fe(NO 3 ) 3 9H 2 O: manufactured by Wako Pure Chemical Industries, Ltd.) 0.194 mol, rhodium chloride (RhCl 3 ·3H 2 O: manufactured by Wako Pure Chemical Industries, Ltd.) 0.006 mol, 10 mol of urea (NH 2 (CO)NH 2 : Wako Pure Chemical Industries, Ltd.) was dissolved. The mixed solution was heated to 90° C. while stirring, and kept at this temperature for 3 hours. After the reaction was completed, it was allowed to stand for 16 hours to allow precipitation, and suction filtration was performed. The precipitate was dried at 80°C for 24 ho...

Embodiment 2

[0039] Embodiment 2 is the same as embodiment 1, using figure 1 In the normal-pressure fixed-bed flow-through reaction device shown, a part of the reaction gas is collected and measured with a gas chromatograph.

[0040] The iron compound contained in the reaction container was prepared by the following coprecipitation method (urea method). That is, iron (III) nitrate nonahydrate (Fe(NO 3 ) 3 9H 2 O: manufactured by Wako Pure Chemical Industries, Ltd.) 0.188 mol, rhodium chloride (RhCl) as a chloride of the first metal (platinum group) added 3 ·3H 2 O: manufactured by Wako Pure Chemical Industries, Ltd.) 0.006 mol, aluminum nitrate (Al(NO 3 ) 3 9H 2 O: manufactured by Wako Pure Chemical Industries, Ltd.) 0.006 mol, 10 mol of urea (NH 2 (CO)NH 2 : Wako Pure Chemical Industries, Ltd.) was dissolved. The mixed solution was heated to 90° C. while stirring, and kept at this temperature for 3 hours. After the reaction was completed, it was allowed to stand for 16 hours to...

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Abstract

A method for producing hydrogen by contacting water, steam or gas containing steam with iron or iron oxide, wherein the iron or iron oxide is added with at least one metal of Rh, Ir, Ru, Pd, Pt and Os and at least one metal of Ti, Zr, V, Nb, Cr, Mo, Al, Ga, Mg, Sc, Ni and Cu. The method provides a medium for producing hydrogen which is capable of producing hydrogen at relatively low temperature and at a great generation rate, is free from the decrease of activity, and is resistance to repeated oxidation and reduction, which leads to the decomposition of water and production of hydrogen with good efficiency.

Description

technical field [0001] The invention relates to the technology of decomposing water to efficiently produce hydrogen. Background technique [0002] Partial oxidation and steam reforming of petroleum and natural gas produce a large amount of carbon dioxide during hydrogen synthesis. Therefore, as a method that does not generate carbon dioxide, the UT-3 cycle using solar heat and the method disclosed in JP-A-07-267601 have been proposed. However, this method requires a large system when utilizing solar heat, and the cost is very high along with it. [0003] In addition, as a means of safely storing and transporting hydrogen, there are many proposals to use hydrogen-absorbing alloys instead of high-pressure pumps. However, hydrogen adsorption to hydrogen-absorbing alloys requires high hydrogen pressure, and it cannot be used in air and water vapor atmospheres, and the price is very high. question. [0004] In the case of fuel cells using hydrogen and air as raw materials, gen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J7/02B01J8/00C01B3/06C01B3/10B01J8/02
CPCB01J7/02B01J8/0285C01B3/06C01B3/061C01B3/10B01J8/025B01J2208/00212B01J8/006Y02E60/36B01J2208/00495
Inventor 大塚潔竹中壮中村清纯饭塚和幸
Owner UCHIYA THERMOSTAT