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Hydrogen preparation method

A technology of mixed gas and biogas, applied in the field of hydrogen production, can solve the problems of high cost, waste of resources, complicated operation, etc., and achieve the effects of low cost, resource saving and wide sources

Active Publication Date: 2015-05-06
张进勇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, using oil and natural gas to produce hydrogen is complex and costly; on the other hand, under the trend of increasingly scarce oil resources, this hydrogen production method still has the technical problem of waste of resources

Method used

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  • Hydrogen preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] S11: Anaerobic fermentation of biological waste to generate biogas;

[0072] Biological waste includes: plant straw, livestock manure, landfill gas and organic sewage from production and domestic use.

[0073] S12: Use Thiobacillus thiooxidans to desulfurize the biogas, and then use a compressor to increase the pressure of the biogas to 3.5 MPa;

[0074] S13: Perform pressure swing adsorption to remove CO from the boosted biogas at room temperature 2 , and then carry out steam shift reaction in the reformer at 850°C under the nickel-based catalyst to obtain 2 、H 2 and a mixture of water vapor;

[0075] Wherein, in the process of the steam shift reaction, the water-to-carbon ratio is 2.5-3 (mol).

[0076] The chemical reaction that takes place in this step is:

[0077] CH 4 +H 2 O=CO+3H 2 -Q, or CO+H 2 O(g)=CO 2 +H 2 +Q.

[0078] S14: After the mixed gas is subjected to a CO shift reaction under the condition of 2.4 MPa and 320°C under the action of an iron-c...

Embodiment 2

[0082] S21: Anaerobic fermentation of biological waste to generate biogas;

[0083] Biological waste includes: plant straw, livestock manure, landfill gas and organic sewage from production and domestic use.

[0084] S22: Use Thiobacillus thiooxidans to desulfurize the biogas, and then use a compressor to increase the pressure of the biogas to 3.5 MPa;

[0085] S23: Put the boosted biogas at 700°C with Ni-Al 2 o 3 / SiO 2 As a catalyst for carbon dioxide reforming reaction of methane to obtain CO, CO 2 、H 2 and a mixture of water vapor;

[0086] The chemical reaction that takes place in this step is: CH 4 +CO 2 =2CO+2H2 .

[0087] S24: After the mixed gas is subjected to a CO shift reaction under the condition of 2.4 MPa and 320°C under the action of an iron-cobalt catalyst, the temperature of the reacted mixed gas is lowered to 40°C, and pressure swing adsorption is performed, Hydrogen with a purity greater than 99.9% is obtained.

[0088] The chemical reaction in th...

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Abstract

The invention provides a hydrogen preparation method and belongs to the field of preparation of hydrogen. The method comprises the following steps: (1) carrying out anaerobic fermentation on biological wastes to produce biogas; (2), purifying the biogas, pressurizing to 3-4 MPa and carrying out hydrocarbon conversion reaction to obtain a mixed gas containing CO, CO2, H2 and steam; and (3), carrying out CO conversion reaction on the mixed gas under the conditions of 2.2-2.6 MPa and 300-350 DEG C in the presence of an iron-cobalt catalyst, cooling the temperature of the reacted mixed gas to 35-45 DEG C and carrying out pressure swing adsorption to obtain hydrogen. The hydrogen preparation method has the technical effects of low cost and energy resource conservation; the current situation that the preparation of hydrogen in the prior art is too dependent on petroleum and natural gas is improved; the hydrogen preparation method provides a novel preparation method of industrial hydrogen; while the hydrogen preparation is ensured, the development of the biogas industry is also greatly promoted.

Description

technical field [0001] The invention relates to the field of hydrogen production, in particular to a hydrogen production method. Background technique [0002] Hydrogen is the gas with the smallest density known in the world and the substance with the smallest relative molecular mass. The mass of hydrogen is only 1 / 14 of that of air. At 0°C and under a standard atmospheric pressure, the density of hydrogen is 0.0899g / L. Hydrogen is an extremely flammable gas that burns at a volume fraction of 4% to 75% in air. [0003] As the most important industrial gas and special gas, hydrogen has been widely used in petrochemical industry, electronics industry, metallurgical industry, food processing, float glass, fine organic synthesis, aerospace and so on. At the same time, hydrogen is also an ideal secondary energy source (secondary energy refers to energy that must be produced from a primary energy source such as solar energy, coal, etc.). [0004] In general, hydrogen easily combi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/02C01B3/12C01B3/34C01B3/50C10L3/10
CPCY02E50/30
Inventor 张进勇
Owner 张进勇
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