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Preparation method of composite catalyst applied to photo-thermal-coupled methanol steam reforming for hydrogen production

A composite catalyst, photothermal coupling technology, applied in catalyst activation/preparation, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc. Hydrogen, high-performance effects

Inactive Publication Date: 2021-03-05
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the advancement of the industrialization of methanol to hydrogen production, methanol steam reforming under purely thermal conditions has increasingly exposed performance bottlenecks and energy consumption problems, so this is not a green development path

Method used

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  • Preparation method of composite catalyst applied to photo-thermal-coupled methanol steam reforming for hydrogen production
  • Preparation method of composite catalyst applied to photo-thermal-coupled methanol steam reforming for hydrogen production
  • Preparation method of composite catalyst applied to photo-thermal-coupled methanol steam reforming for hydrogen production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Example 1: Cu / TiO 2 -CeO 2 preparation of

[0038] Preparation of binary porous carrier TiO by sol-gel method 2 -CeO 2 .

[0039] (1) Dissolve 3.2 g of surfactant polyether F127 in 60 ml of ethanol, and stir magnetically at 40° C. for 30 minutes to form solution 1;

[0040] (2) 7ml of tetrabutyl titanate, 4.6ml of glacial acetic acid, 1.6ml of nitric acid and cerium nitrate hexahydrate (0.01-0.04mol) corresponding to different molar ratios (Ti / Ce) were added to the first solution in sequence and added at 40 Stir magnetically at ℃ for 2 hours, during which a wet gel is formed;

[0041] (3) Place the wet gel in a petri dish, and age it for 12 hours at a temperature of 40° C. and a humidity of 40%, during which a dry gel is formed;

[0042] (4) Dry the aged sample at 100°C for 12 hours;

[0043] (5) The dried product was calcined at 450°C at a heating rate of 1°C / min for 5h, and cooled to room temperature at 2°C / min, and ground to obtain the final binary porous carr...

Embodiment 2

[0049] Example 2: Cu / TiO 2 -CeO 2 Thermocatalytic Performance Test of Composite Porous Oxide Catalysts

[0050] Such as figure 1 As shown, take 8 mg of catalyst loaded on the glass fiber membrane, and place it in a special reaction tube. During the reaction process, methanol / water vapor is continuously delivered in front of the reaction tube, the reactor is set to the required temperature, and the light-transmitting hole is covered. At this time, the composite catalyst only performs methanol reforming hydrogen production under purely thermal conditions at the desired temperature. The reaction conditions are methanol:water=1:1.2, the sampling speed is 4uL / min, and the gas at the outlet of the reactor is sent to a gas chromatograph for detection. Such as Figure 5 As shown, the hydrogen production rate is 22.0mmol / h / g at 275°C and 58.6mmol / h / g at 300°C. Demonstration of Cu / TiO under thermal conditions 2 -CeO 2 The composite oxide catalyst has thermocatalytic properties. ...

Embodiment 3

[0051] Example 3: Cu / TiO 2 -CeO 2 Photothermal Coupling Catalytic Performance Test of Composite Porous Oxide Catalysts

[0052] Take 8 mg of catalyst loaded on the glass fiber membrane, and place it in a special reaction tube. During the reaction process, the methanol / water vapor is continuously transported in front of the reaction tube, the reactor is set to the required temperature, and the xenon lamp is turned on to irradiate sunlight. The special-shaped holes on the wall are introduced into the surface of the catalyst. At this time, the composite catalyst absorbs high-energy photons at the required temperature to perform photothermal coupling reforming to produce hydrogen. The reaction conditions are methanol: water = 1:1.2, the sampling speed is 4uL / min, and the gas at the outlet of the reactor is sent to a gas chromatograph for detection. The hydrogen production rate was 48.1 mmol / h / g at 275°C and 78.8 mmol / h / g at 300°C. Compared with the thermocatalytic hydrogen pr...

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Abstract

The invention discloses a preparation method of a composite catalyst applied to photo-thermal-coupled methanol steam reforming for hydrogen production. The composite catalyst can simultaneously absorbheat radiation generated by hearth heating and ultraviolet-visible light irradiated by an external xenon lamp in a photo-thermal reactor. According to the invention, on one hand, heat radiation is utilized to reach a temperature required by thermal catalysis, and desired methanol and water are absorbed; and on the other hand, high-energy photons are used for exciting separation of photo-induced electron hole pairs, so oxidation reduction of reactants is accelerated, more intermediate products are generated, methanol and water are catalyzed to undergo a reforming reaction under the combined action of heat radiation and light absorption, and photo-thermal-coupled methanol steam reforming for hydrogen production is achieved. Besides, the prepared photo-thermal synergistic catalyst has a porous structure and can relieve the problem of high-temperature sintering in long-term reaction, so the stability of a reforming hydrogen production process is improved. The photo-thermal-coupled methanol steam reforming for hydrogen production realizes the synergistic utilization of heat radiation and sunlight, the performance of photo-thermal-coupled methanol steam reforming for hydrogen productionis better than the performance of a hydrogen production reaction under pure heat radiation, and the requirement for long-term efficient operation can be met.

Description

technical field [0001] The invention relates to a preparation method of a photothermal coupling methanol steam reforming hydrogen production composite catalyst, which belongs to the technical field of composite material preparation. Background technique [0002] Since the last century, the excessive consumption of fossil fuels has caused a large amount of greenhouse gases to enter the atmosphere, which has further led to global warming and the global energy crisis. Realizing the sustainable development of human society needs to balance the relationship between energy utilization, economic development and environmental protection, so it is urgent to explore a green development path that can achieve rapid economic development and effectively protect the environment. The total amount of solar energy is huge, widely distributed, without transportation and inexhaustible, it is the most important renewable clean energy. However, the energy density of solar energy is low, and its ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83B01J35/10B01J37/03B01J37/08B01J37/02C01B3/32
CPCB01J23/83B01J23/002B01J37/036B01J37/082B01J37/0201B01J37/088C01B3/326B01J2523/00C01B2203/0233C01B2203/1076B01J35/39B01J35/615B01J2523/17B01J2523/3712B01J2523/47
Inventor 鲍创刘向雷
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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