Oxidation reduction method of cobalt-manganese composite oxide applied to low-concentration propane combustion reaction, product of oxidation reduction method and application of product

A composite oxide and combustion reaction technology, applied in combustion methods, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., to achieve good performance

Active Publication Date: 2018-01-19
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Examples

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Embodiment 1

[0025] Weigh 3.16 g potassium permanganate (KMnO 4 ) was dissolved in 100 mL of water, stirred at room temperature until dissolved; another 5 g of cobalt acetate (C 4 h 8 CoO 4 4H 2 O) Dissolve in 100 mL deionized water and stir at room temperature until dissolved. After the above two solutions were dissolved respectively, the cobalt acetate solution was added dropwise to the potassium permanganate solution, and stirred at 50 °C for 2 h to obtain a mixed solution.

[0026] Measure 1.3 mL of 85% (mass fraction) formic acid solution and dissolve it in 50 mL of deionized water. After mixing evenly, add the formic acid solution dropwise to the above mixed solution under stirring, and continue stirring at 50°C for 2 h. After vacuum filtration, the filter cake was washed several times with deionized water and absolute ethanol, and then placed in a blast drying oven at 50 °C for 12 h to dry. After being ground, it was roasted in a muffle furnace, and the temperature was raised ...

Embodiment 2

[0028] The amount of cobalt acetate in Example 1 was adjusted to 15 g, and other preparation conditions were the same as in Example 1 to obtain Sample 2.

Embodiment 3

[0030] The calcination temperature in Example 2 was changed from 300°C to 400°C, and other conditions were the same as in Example 2 to obtain Sample 3.

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Abstract

The invention discloses an oxidation reduction method of cobalt-manganese composite oxide applied to low-concentration propane combustion reaction, a product of the oxidation reduction method and application of the product. The method comprises the steps of continuing adding a 0.6mol/L formic acid solution into a potassium permanganate solution and a cobalt acetate solution at 50-80 DEG C under mixing and stirring conditions, continuing to stir for a period of time, and carrying out suction filtration, washing, drying and roasting, so as to obtain cobalt-manganese oxide. The obtained oxide isapplied to propane catalytic combustion reaction, the initiation temperature is 110 DEG C, and the oxide presents very good activity. According to the oxidation reduction method, by adding reducing agents with different strengths into a strong oxidant, namely the potassium permanganate solution in batches, potassium permanganate is gradually reduced, and the oxide is gradually formed, so that forming of different crustal surfaces is conveniently adjusted and controlled, the required oxide surface is exposed, and the catalysis to different reactions is realized. The method has the advantages ofnovel thought, controllability, adjustability and simple preparation process and is applicable to the preparation process of manganese-base composite oxide.

Description

technical field [0001] The invention belongs to the field of material preparation, and in particular relates to a redox method of cobalt-manganese composite oxide applied to low-concentration propane combustion reaction and its product and application. Background technique [0002] Due to the abundant resources and low price, metal oxides can be used in many fields, and their gradual replacement of precious metals has been extensively studied. Taking the field of catalysis as an example, transition metal oxides such as cobalt (Co), copper (Cu), manganese (Mn), iron (Fe), nickel (Ni), etc. play an increasingly important role. Compared with single metal oxides, complex transition metal oxides have better properties and are the focus of current research. [0003] Among many composite metal oxides, manganese oxide has various crystal structures and valence states, and has outstanding performance in catalytic combustion reactions. Therefore, the preparation and application of m...

Claims

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Application Information

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IPC IPC(8): B01J23/889F23G7/07
Inventor 何丹农袁静赵昆峰高振源蔡婷杨玲张涛金彩虹
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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