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Cu-Co bimetal spinel type catalyst, preparation thereof and application of Cu-Co bimetal spinel type catalyst in methane production through dichloromethane reductive dechlorination

A spinel type, catalyst technology, used in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc., can solve the problem of reducing catalytic activity and stability, catalyst overheating, Catalyst sintering and other problems, to achieve the effect of accelerating electron transfer rate, excellent performance and mild conditions

Pending Publication Date: 2022-05-06
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a large amount of heat will be released during the methanation reaction, which will easily cause local overheating of the catalyst to generate hot spots, resulting in catalyst sintering, reducing catalytic activity and stability.

Method used

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  • Cu-Co bimetal spinel type catalyst, preparation thereof and application of Cu-Co bimetal spinel type catalyst in methane production through dichloromethane reductive dechlorination
  • Cu-Co bimetal spinel type catalyst, preparation thereof and application of Cu-Co bimetal spinel type catalyst in methane production through dichloromethane reductive dechlorination
  • Cu-Co bimetal spinel type catalyst, preparation thereof and application of Cu-Co bimetal spinel type catalyst in methane production through dichloromethane reductive dechlorination

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Preparation of bimetallic spinel catalysts:

[0035] (1) 0.145g Cu(NO 3 ) 2 ·3H 2 O, 0.349g Co(NO 3 ) 2 ·6H 2 O, 0.360g of urea and 0.1333g of NH 4 F was dissolved in 72 mL of deionized water, and solution A was obtained after complete dissolution.

[0036] (2) Place solution A on a magnetic stirrer and stir for 30 minutes, transfer it to a 100mL high-temperature reaction kettle, and tighten it;

[0037] (3) Place the tightened high-temperature reactor in an oven, and conduct a hydrothermal reaction at 150°C for 6 hours to obtain a solution B after the reaction;

[0038] (4) Solution B was washed 6 times alternately with deionized water and ethanol, and the centrifugation speed was 8000r / min, and the centrifugation time was 5min to obtain solid I;

[0039] (5) Dry the solid I in an oven at 70° C. for 24 h, and transfer the dried solid I to a crucible.

[0040] (6) Place the crucible in a muffle furnace and calcinate at 350°C for 3 hours, with a heating rate of ...

Embodiment 2

[0046] The difference from Example 1 is that the temperature of the hydrothermal reaction in step (3) is 140° C., and the obtained material is named catalyst 2, and the reaction results are listed in Table 1.

Embodiment 3

[0048] The difference from Example 1 is that the temperature of the hydrothermal reaction in step (3) is 170° C., and the obtained material is named catalyst 3, and the reaction results are listed in Table 1.

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Abstract

The invention discloses a Cu-Co bimetallic spinel type catalyst, a preparation method thereof and application of the Cu-Co bimetallic spinel type catalyst in methane production through dichloromethane reductive dechlorination. CuCo2O4 bimetallic spinel is of a rod-like nano-structure with bulges on the surface, and the preparation method of the catalyst comprises the following steps: (1) dissolving nitrate, urea and NH4F in deionized water, and carrying out hydrothermal reaction at 150 DEG C for 6 hours to obtain a Cu-Co spinel precursor; and (2) calcining in a muffle furnace at 350 DEG C at different heating rates for 3 hours to directly obtain the catalyst. The obtained catalyst is subjected to an electrocatalytic reduction dichloromethane dechlorination methane production reaction at normal temperature and normal pressure, efficient dichloromethane dechlorination methane production can be achieved, and the catalyst has high environmental and energy significance. In addition, the methane preparation method provided by the invention is simple to operate, and can safely and conveniently prepare pure gas-phase methane.

Description

technical field [0001] The invention belongs to the field of catalytic reduction dechlorination, and in particular relates to the preparation of a Cu-Co bimetallic spinel catalyst and its application in the reduction and dechlorination of methylene chloride to produce methane. Background technique [0002] Methane is a very important fuel and the main component of natural gas, accounting for about 87% of natural gas. It can be used not only as a fuel but also as a solar cell, a carbon source for vapor-phase chemical deposition of amorphous silicon films, and methane as a raw material for pharmaceutical and chemical synthesis. At present, the synthesis of methane at home and abroad is mainly based on high-temperature methanation technology. However, a large amount of heat will be released during the methanation reaction, which will easily cause local overheating of the catalyst to generate hot spots, resulting in catalyst sintering, reducing catalytic activity and stability....

Claims

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Application Information

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IPC IPC(8): B01J23/75B01J35/02B01J37/10C25B3/03C25B3/25C25B11/077
CPCB01J23/005B01J23/75B01J37/10C25B3/03C25B3/25C25B11/0771B01J35/50
Inventor 李新勇王婧范诗迎杨静
Owner DALIAN UNIV OF TECH