Reforming hydrogen production method, nano cuprous oxide-zinc oxide composite catalyst and preparation method and cyclic regeneration method of nano cuprous oxide-zinc oxide composite catalyst

A nano-cuprous oxide and composite catalyst technology, applied in metal/metal oxide/metal hydroxide catalysts, catalyst regeneration/reactivation, physical/chemical process catalysts, etc., can solve the potential safety hazards and loss of catalytic activity of hydrogen. , large consumption of hydrogen energy, etc., to achieve the effect of being environmentally friendly, easy to obtain, and avoiding oxidative deactivation

Active Publication Date: 2022-03-18
SHANDONG UNIV OF TECH
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  • Description
  • Claims
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Problems solved by technology

[0003] The above pre-reduction process requires long-term high-temperature insulation and consumes a lot of hydrogen energy, resulting in high production costs
In addition, there are safety hazards in the storage and use of hydrogen
Moreover, copper-based catalysts tend to aggregate copper species at high operating temperatures (>300°C), and then lose their catalytic activity, which cannot meet the needs of certain high-temperature production conditions. Therefore, their thermal stability at high temperatures is improved to important

Method used

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  • Reforming hydrogen production method, nano cuprous oxide-zinc oxide composite catalyst and preparation method and cyclic regeneration method of nano cuprous oxide-zinc oxide composite catalyst
  • Reforming hydrogen production method, nano cuprous oxide-zinc oxide composite catalyst and preparation method and cyclic regeneration method of nano cuprous oxide-zinc oxide composite catalyst
  • Reforming hydrogen production method, nano cuprous oxide-zinc oxide composite catalyst and preparation method and cyclic regeneration method of nano cuprous oxide-zinc oxide composite catalyst

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preparation example Construction

[0059] The present invention provides the preparation method of high-temperature self-activated nano-cuprous oxide-zinc oxide composite catalyst described in the above technical scheme, comprising the following steps:

[0060] mixing the rod-shaped zinc oxide and copper salt solution to obtain a zinc oxide-copper ion dispersion;

[0061] Mixing the stabilizer, reducing agent and water to obtain a stabilizer-reducing agent system;

[0062] The stabilizer-reductant system is added dropwise into the zinc oxide-copper ion dispersion liquid to perform a reduction reaction to obtain a high-temperature self-activating nano cuprous oxide-zinc oxide composite catalyst.

[0063] The invention can prepare the high-temperature self-activating nano-cuprous oxide-zinc oxide composite catalyst at normal temperature and pressure by using commercially available conventional reagent materials. The raw material cost is low, the production cycle is extremely short, and the preparation is simple. ...

Embodiment 1

[0083] Generate rod-shaped zinc oxide by direct precipitation method: Weigh 7.08g of NaOH, dissolve it in deionized water to make the sodium ion concentration reach 4mol / L, and heat it to 70°C in a constant temperature magnetic stirrer, then weigh The zinc acetate dihydrate of 9.72g is dissolved in deionized water to form a zinc acetate dihydrate solution with a zinc ion concentration of 1mol / L. The magnetic stirrer makes it fully stirred to form a transparent solution. The zinc acetate dihydrate solution is mixed with 0.5 drops / L Add drop by drop to the NaOH solution at a rate of 1 second, and the reaction is completed after 1 hour of heat preservation; the reaction vessel is naturally cooled to room temperature, the solution is taken out, centrifuged, washed with distilled water, and dried to obtain rod-shaped zinc oxide.

[0084] According to the mass ratio of copper ions to rod-shaped zinc oxide of 1:9, prepare a 0.2mol / L copper sulfate pentahydrate solution, add 2.7g of th...

Embodiment 2

[0088] Generate rod-shaped zinc oxide by direct precipitation method: Weigh 7.08g of NaOH, dissolve it in deionized water to make the sodium ion concentration reach 4mol / L, and heat it to 70°C in a constant temperature magnetic stirrer, then weigh The zinc nitrate hexahydrate of 13.16g is dissolved in deionized water to form a zinc nitrate hexahydrate solution with a zinc ion concentration of 1mol / L. A magnetic stirrer makes it fully stirred to form a transparent solution. The zinc nitrate hexahydrate solution is mixed with 0.5 drops / L Add drop by drop to the NaOH solution at a rate of 1 second, and the reaction is completed after 1 hour of heat preservation; the reaction vessel is naturally cooled to room temperature, the solution is taken out, centrifuged, washed with distilled water, and dried to obtain rod-shaped zinc oxide.

[0089] According to the mass ratio of copper ions to rod-shaped zinc oxide of 1:9, prepare a 0.2mol / L copper chloride dihydrate solution, add 2.7g of...

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Abstract

The invention provides a method for hydrogen production through methanol steam reforming, a high-temperature self-activated nano cuprous oxide-zinc oxide composite catalyst and a preparation method and a cyclic regeneration method thereof, and relates to the technical field of hydrogen production. The high-temperature self-activated nano cuprous oxide-zinc oxide composite catalyst is adopted for hydrogen production through methanol steam reforming, the preparation cost is low, methanol serves as a hydrogen carrier, hydrogen pre-reduction is not needed, safety is higher, the hydrogen production efficiency is high, and high thermal stability is kept at the high temperature of 500 DEG C or above.

Description

technical field [0001] The invention relates to the technical field of hydrogen production, in particular to a method for hydrogen production by steam reforming of methanol, a high-temperature self-activated nano-cuprous oxide-zinc oxide composite catalyst, a preparation method thereof, and a recycling regeneration method. Background technique [0002] CuO / ZnO / Al is the currently widely used methanol steam reforming catalyst for hydrogen production 2 o 3 Although the catalyst has high low-temperature activity and good hydrogen selectivity, its stability is poor, and it needs to carry out H 2 Pre-reduction step. FornariAC et al prepared CuO-ZnO-Al by sol-gel method 2 o 3 Catalyst (FornariA C, Neto R M, Lenzi G G, et al.Utilization of sol-gel CuO-ZnO-Al 2 o 3 catalysts in the methanolsteam reforming for hydrogen production[J]. The Canadian Journal of Chemical Engineering, 2017, 95.), although it is active at low temperature and has good hydrogen selectivity, but its sta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/32B01J23/80B01J35/02B01J38/02B01J38/48
CPCC01B3/326B01J23/002B01J23/80B01J35/023B01J38/02B01J38/48C01B2203/0233C01B2203/1223C01B2203/1076C01B2203/1082Y02P20/584
Inventor 付鹏王爱霞郑庆琪魏鹏范庆文张玉春
Owner SHANDONG UNIV OF TECH
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