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Hydrogen production catalyst system, hydrogen production system comprising same and applications of hydrogen production catalyst system

A catalytic system and system technology, applied in the fields of energy and environment, can solve the problems of difficulty in control, increase the cost of hydrogen production, and reduce the hydrogen production efficiency of the reaction system, etc.

Active Publication Date: 2017-09-05
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] In the field of hydrogen production, it is important to point out that for most hydrogen production reactions, whether natural dehydrogenase or synthetic catalytic materials are used as hydrogen production catalysts, or in the laboratory or industrial hydrogen production process , it is necessary to completely remove the oxygen in the reaction system in advance, mainly because oxygen will react with hydrogen on the surface of the catalyst to generate water or hydroxide (2H 2 +O 2 →2H 2 O), thereby greatly reducing the hydrogen production efficiency of the reaction system
Therefore, in order to improve the efficiency of hydrogen production, the reaction system must be kept sealed at all times during the hydrogen production process, and air or oxygen cannot be mixed in. As the hydrogen production reaction proceeds, the generated oxygen needs to be continuously discharged, which requires additional Vacuum equipment or equipment for storing inert gas (passing inert gas to discharge oxygen), which will not only increase the cost of hydrogen production, but also make the reaction operation more complicated and difficult to control, which is not conducive to industrialization and application

Method used

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  • Hydrogen production catalyst system, hydrogen production system comprising same and applications of hydrogen production catalyst system
  • Hydrogen production catalyst system, hydrogen production system comprising same and applications of hydrogen production catalyst system
  • Hydrogen production catalyst system, hydrogen production system comprising same and applications of hydrogen production catalyst system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0107] Examples 1-18 take Ag / MgO catalyst and formaldehyde aqueous solution as biomass solution as an example to illustrate the hydrogen production effect of the present invention, the morphology and structure of Ag / MgO catalyst are as follows figure 1 As shown, the specific surface area of ​​the catalyst is 80m 2 / g, the Ag loading is 0.8wt%. figure 1 a–d are the HAADF-STEM images of Ag / MgO (the embedded image is monodisperse Ag nanoparticles), showing the uniform distribution of Ag nanoparticles on the surface of MgO; figure 1 e is the HR-TEM picture of Ag / MgO (the embedded picture is the selected area electron diffraction pattern), showing the Ag(111) crystal plane and the MgO(200) crystal plane; Figure f is the XRD spectrum of Ag / MgO, showing the Ag and MgO diffraction peaks. HAADF-STEM refers to High Angle Annular Dark Field Image-Scanning Transmission Electron Microscopy, HR-TEM refers to High Power Transmission Electron Microscopy, and XRD refers to X-ray Diffraction....

Embodiment 2-13

[0110] The results of the oxygen pressure, dissolved oxygen content and hydrogen production in Examples 2-13 are shown in Table 1.

[0111] serial number Gas phase oxygen pressure / MPa Dissolved Oxygen Content / micromolar Hydrogen production / μmol Example 2 0.00 0 0 Example 3 0.01 0.39 96.0 Example 4 0.02 1.24 273.6 Example 5 0.03 1.43 309.7 Example 6 0.04 2.34 460.4 Example 7 0.06 3.77 691.2 Example 8 0.07 4.75 803.1 Example 9 0.10 6.50 1116.5 Example 10 0.20 13.0 734.3 Example 11 0.30 19.5 1095.0 Example 12 0.41 26.0 1180.6 Example 13 0.51 32.5 1254.1

Embodiment 2

[0112] Examples 2-13 studied the effects of different oxygen pressures / concentrations in the hydrogen production system on the Ag / MgO catalyzed formaldehyde aqueous solution to produce hydrogen. Reaction conditions: room temperature (25 ℃), formaldehyde concentration is 1mol / L, volume is 5 milliliters, Ag loading capacity is 0.8wt%, and Ag / MgO quality is 20 milligrams; For the reaction of embodiment 2-10, reaction time is 6 Hour, for the reaction of embodiment 11-13, the reaction time is 2 hours. As can be seen from Examples 2-13, when the oxygen pressure is 0 (embodiment 2), there is almost no hydrogen production, and when the oxygen pressure rises from 0 to 0.51 MPa, the hydrogen production also increases linearly, indicating that oxygen It has a decisive influence on the production of hydrogen. At the same time, by controlling the oxygen pressure, we can also control the rate and total amount of hydrogen produced. from image 3 It can be seen that in the process of hydro...

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Abstract

The invention provides a hydrogen production catalyst system, a hydrogen production system comprising the same and applications of the hydrogen production catalyst system. The hydrogen production catalyst system comprises a metal nano catalyst and a biomass water solution. The metal nano catalyst catalyzes the biomass water solution to produce hydrogen. The hydrogen production efficiency and hydrogen production capacity of the catalyst system are controlled by the amount of oxygen. The hydrogen production efficiency of the catalyst system is increased, when the pressure or concentration of oxygen in the hydrogen production reaction system increases. For the first time, oxygen molecules are used to control the production speed of hydrogen. Moreover, the hydrogen production method is efficient, clean, and environmentally friendly, and is easy to control; and the equipment is simple. At a low temperature (not lower than 0 DEG C), water hydrolysis and biomass hydrolysis can be realized at the same time, the energy consumption is greatly reduced, an energy-consumption-free reaction condition can be almost realized, and the catalytic method is sustainable and has a wide application prospect. At the same time, the catalyst system can be applied to fields such as hydrogen production, energy and chemical industry, battery, water treatment, paint, functional textile, indoor air purification and formaldehyde removing, petrochemical engineering, carbon-hydrogen bond activation, pharmacy, hydrogen-containing water preparation, and the like.

Description

technical field [0001] The invention relates to the fields of energy and environment, in particular to a hydrogen production catalytic system, a hydrogen production system comprising the catalytic system and applications thereof. Background technique [0002] With the development of social economy and science and technology, human beings pay more and more attention to energy and environmental issues. Developing clean and efficient new energy and solving the problems of energy shortage and environmental pollution have gradually become the core mission of today's social development. Hydrogen has a high combustion value, is non-toxic and odorless, and the combustion products are environmentally friendly, and it is a renewable energy source. Hydrogen energy is bound to play an important role in meeting the world's future sustainable energy needs. [0003] The most abundant hydrogen-containing substance on the earth is water, followed by various fossil fuels such as coal, oil, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/04C01B3/32
CPCB01D53/8668D06M11/44D06M11/83D06M13/342D06M15/03C01B3/042C01B3/326B01J23/28B01J23/30B01J23/58B01J23/66B01J23/78B01J27/22B01J29/0325B01J29/44B01J37/088B01J37/16D06M2101/10D06M2101/06D06M2101/32C01B2203/0277C01B2203/1082C01B2203/107C01B2203/1094C01B2203/1041C01B2203/1058C01B2203/1064C01B2203/1052B01D2256/22B01D2256/16B01D2259/4508B01J35/397Y02E60/36
Inventor 李仁宏闫晓庆范杰祝晓辉吴碧灵
Owner ZHEJIANG SCI-TECH UNIV
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