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Copper-based catalyst as well as preparation method and application thereof

A copper-based catalyst and solvent technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., to achieve the effects of cost reduction, low mass production cost, and high hydrogen production performance

Active Publication Date: 2020-04-24
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hydrogen production rate exceeds RannyNi at 210-230 ° C, and there is almost no carbon monoxide and methane in the gas, and the overall performance is comparable to that of 5% PtC. It solves the problem of a cheap and easy-to-obtain non-precious metal catalyst that efficiently catalyzes the aqueous phase reforming of methanol to produce hydrogen. technical issues

Method used

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  • Copper-based catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1. Dissolve 18mmol zinc nitrate hexahydrate in 50ml methanol, sonicate for 5min, and mark it as solution A;

[0033] 2. Dissolve 72mmol 2-methylimidazole in 50ml methanol, sonicate for 5min, and mark it as solution B;

[0034] 3. Pour liquid B into liquid A, put it in an oil bath at 60°C for 24 hours to obtain a white precipitate, dry the precipitate at 60°C to obtain a ZIF-8 carrier, and dry it at 200°C for 2 hours in air to remove the adsorbed The small molecule organic matter in the zif-8 channel is used to prepare the activated ZIF-8 carrier.

[0035] 4. Take 400mg of the activated ZIF-8 carrier in 12ml of 0.024mmol / ml copper nitrate aqueous solution and stir at room temperature for 24h, centrifuge the obtained precipitate and dry it at 60°C, and reduce it under hydrogen at 200°C for 2h to obtain a copper-based catalyst. Among them, the loading amount of CuOx is 27wt% (27%CuOx / ZnO@CN) (x=0, 0.5 and 1).

Embodiment 2

[0037] The difference from Example 1 is that in step 4, 400 mg of the activated ZIF-8 carrier is stirred in 12 ml of 0.008 mmol / ml copper nitrate aqueous solution for 24 hours at room temperature to obtain 14% CuOx-ZnO@CN (x=0, 0.5 and 1).

Embodiment 3

[0039] The difference from Example 1 is that in step 4, 400 mg of the activated ZIF-8 carrier was stirred in 12 ml of 0.16 mmol / ml copper nitrate aqueous solution for 24 hours at room temperature to prepare 21% CuOx-ZnO@CN (x=0, 0.5 and 1 ).

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Abstract

The invention belongs to the technical field of catalysts, and discloses a copper-based catalyst as well as a preparation method and application thereof. The copper-based catalyst is prepared by the steps: making zinc nitrate and 2-methylimidazole into a solution by using a solvent, mixing, standing in an oil bath at the temperature of 60-80 DEG C, drying the obtained precipitate, and carrying outheat treatment at the temperature of 190-210 DEG C to obtain an activated ZIF-8 carrier; and stirring the activated ZIF-8 carrier in a copper nitrate aqueous solution at normal temperature, carryingout centrifugal precipitation, drying, and carrying out a reduction reaction at the temperature of 200-350 DEG C in the presence of hydrogen to obtain the catalyst. The copper-based catalyst comprisesan active component CuOx, a cocatalyst ZnO and a carrier CN, and CuOx and ZnO are both dispersedly loaded in a CN structure and the product is abbreviated as CuOx / ZnO coated CN, wherein x is the valence state of Cu, and x is equal to 0, 0.5 and 1. The copper-based catalyst is high in hydrogen production performance and can be applied to the field of hydrogen production by methanol aqueous phase reforming.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and more specifically relates to a copper-based catalyst and its preparation method and application. Background technique [0002] Hydrogen energy has become an attractive alternative energy due to its cleanliness, high calorific value, multiple utilization forms, and energy storage. Among them, hydrogen energy fuel cells are the ideal form of using hydrogen energy as power to promote, and the promotion of hydrogen energy requires clean and sustainable hydrogen supply. How to store hydrogen safely and effectively is widely considered to be the most important step in the transition to a hydrogen-powered society. One of the most challenging techniques. If hydrogen is directly stored and transported, there are reasons such as high pressure and large volume. However, the hydrogen production technology through the aqueous phase reforming of liquid fuels releases hydrogen from liquid fuels and uses...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J37/08B01J37/18C01B3/32
CPCB01J27/24B01J37/086B01J37/082B01J37/18C01B3/326C01B2203/1076C01B2203/1223Y02P20/52
Inventor 郑泽锋王铁军仇松柏武平马宇飞秦延林刘雨佳张浅
Owner GUANGDONG UNIV OF TECH
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