Method of preparing hydrogen by reforming methanol-water steam

A steam reforming and methanol technology, applied in chemical instruments and methods, hydrogen, inorganic chemistry, etc., can solve the problems of unresolved reaction heat supply, pollution, inability to meet mobile hydrogen production, and large device volume. Achieve the effect of mobile on-site hydrogen production, easy mobile on-site hydrogen production, and less environmental pollution

Active Publication Date: 2007-09-12
SOUTHWEST RES & DESIGN INST OF CHEM IND
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Problems solved by technology

Although this process solves the environmental pollution caused by the vent gas, it does not solve the pollution caused by the reaction heat supply problem.
[0003] At the same time, the development of hydrogen fuel vehicles and fuel cells needs to provide mobile hydrogen production devices, but the traditional methanol steam reforming hydrogen production process is troublesome due to the use of coal or oil combustion for heating, and these fuels bring great harm to the air. pollution, and more equipment is needed to solve the pollution problem, which makes the whole device relatively large in size, which cannot well meet the needs of mobile hydrogen production
[0004] In addition, the traditional methanol steam reforming hydrogen production plant with a production capacity of 1000Nm3 / h consumes 0.6t / h of coal for combustion and heating, which consumes a lot of energy

Method used

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  • Method of preparing hydrogen by reforming methanol-water steam

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Embodiment

[0028] The process flow of the method for preparing hydrogen by steam reforming of methanol in this embodiment is as shown in Figure 1, and the method is as follows:

[0029] The raw material methanol 1 and soft water 2 are passed into the device at a molar ratio of 1:1.6, preheated to 90°C through the heat exchanger 6, vaporized in the vaporizer 3, and then overheated in the superheater 4 to reach a reaction temperature of 230°C. The reforming reaction is carried out in the device 5, using CuO / ZnO / Al 2 o 3 Catalyst, the reaction pressure is 0.85Mpa, the gas after the reaction is heat-exchanged by the heat exchanger 6 to obtain a reformed mixed gas; the reformed mixed gas enters the pressure swing adsorption system 7 for purification and separation, and two parts of the product hydrogen 10 and the purge gas are obtained;

[0030] In the hydrogen production process of methanol steam reforming in this embodiment, the three steps of vaporization, superheating and reforming react...

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Abstract

This invention discloses a method for reforming methyl alcohol vapour to prepare hydrogen including: preheating, vapouring to 230-280deg.C raw materials of methyl alcohol and water in the mol ratio of 1 :1-1.6, then carrying out catalyzing and reforming reaction in a reactor to be mixed and puried characterizing that : a, when starting, the method utilizes methyl alcohol as the heat-supply material and utilizes the discharge gas in reforming and puring alcohol and its vapour after starting up, b, the alcohol and its discharge gas supply heat by independent burning sprayers of alcohol and discharge gas in a heating furnace, c, waste gas after combustion is discharged after adsorption and purification, which replaces traditional coal and oil as the heat supply fuel.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, in particular to a method for preparing hydrogen by steam reforming of methanol. Background technique [0002] The rapid development of hydrogen fuel vehicles and fuel cells makes hydrogen an important clean energy. At present, a large amount of hydrogen comes from coal, natural gas and petroleum. Since the storage and transportation of hydrogen has always been a difficult problem, industries with relatively small hydrogen consumption need other hydrogen production processes to achieve. Hydrogen production by methanol steam reforming has the characteristics of less investment and small equipment footprint, which is favored by users. However, methanol steam reforming reaction is a strong endothermic reaction. This process requires continuous heat supply from an external heat source to maintain the reaction. carried out. The traditional methanol steam reforming hydrogen production proce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/32
Inventor 张晓阳胡志彪凌华招刘京林黄宏李倩刘婷
Owner SOUTHWEST RES & DESIGN INST OF CHEM IND
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