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Preparation method of loaded cobalt catalyst

A technology for supporting metals and metal cobalt, which is applied in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc. Advanced problems, to achieve uniform doping, simplify the process, reduce production costs

Active Publication Date: 2017-07-07
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: provide a kind of preparation method of supported metal cobalt catalyst, prepare spinel type oxide CoAl by sol-gel method 2 o 4 , and then use the impregnation method to load the above oxides on the surface of sepiolite mineral nanofibers to prepare CoAl 2 o 4 / Sepiolite mineral nanofiber composite material, and then reduce the composite material in a reducing atmosphere to obtain cobalt / CoAl 2 o 4 / Sepiolite Mineral Nanofiber Composite Material That Is CoAl Loaded with Metal Cobalt 2 o 4 The supported metal cobalt catalyst composed of sepiolite mineral nanofiber composite material overcomes the disadvantages of the existing supported metal cobalt catalyst, such as complex preparation process, high reaction energy consumption, poor high temperature stability of the product and easy agglomeration at high temperature

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The first step is to prepare the spinel oxide CoAl 2 o 4 :

[0035] Preparation of spinel-type oxide CoAl by sol-gel method 2 o 4 ,Proceed as follows:

[0036] Weigh the required amount of cobalt nitrate and aluminum nitrate and dissolve it in ethylene glycol, configure it as a solution containing cobalt ions and aluminum ions, stir at a constant temperature of 30°C for 0.5h, then add citric acid to the solution, and then magnetically stir at a constant temperature Stir at a constant temperature of 50°C for 0.5h, wherein the molar ratio of cobalt ions, aluminum ions, ethylene glycol and citric acid is 1:1:10:2, then adjust the pH value to 5.8 with ammonia water, raise the temperature to 60°C and stir for 0.5h , into a colloid, put the colloid in an oven and dry it at 80°C, grind the cooled dry solid until there are no large lumps, put it in a muffle furnace, bake it at 600°C, keep it for 1h, take out the solid after roasting and further Grind to powder to get spine...

Embodiment 2

[0042] The first step is to prepare the spinel oxide CoAl 2 o 4 :

[0043] Preparation of spinel-type oxide CoAl by sol-gel method 2 o 4 ,Proceed as follows:

[0044] Weigh the required amount of cobalt sulfate and aluminum acetate and dissolve them in ethylene glycol, configure them as a solution containing cobalt ions and aluminum ions, stir at a constant temperature of 40°C for 1 hour, then add citric acid to the solution, and then place it on a constant temperature magnetic stirrer Stir at a constant temperature of 50°C for 1h, wherein the molar ratio of cobalt ions, aluminum ions, ethylene glycol and citric acid is 1:1.5:15:3, then adjust the pH value to 6 with ammonia water, raise the temperature to 70°C and stir for 1h, and become Colloid, put the colloid in an oven to dry at 100°C, grind the cooled dry solid until there are no large lumps, put it in a muffle furnace, roast it at 800°C, keep it for 2 hours, take out the roasted solid and grind it into powder shape,...

Embodiment 3

[0050] The first step is to prepare the spinel oxide CoAl 2 o 4 :

[0051] Preparation of spinel-type oxide CoAl by sol-gel method 2 o 4 ,Proceed as follows:

[0052]Weigh the required amount of cobalt chloride and aluminum chloride and dissolve them in ethylene glycol to form a solution containing cobalt ions and aluminum ions, stir at a constant temperature of 50°C for 1.5 hours, then add citric acid to the solution, and then Stir at a constant temperature of 50°C on a magnetic stirrer for 1.5h, wherein the molar ratio of cobalt ions, aluminum ions, ethylene glycol and citric acid is 1:2:20:4, then adjust the pH value to 6.2 with ammonia water, heat up to 80°C and stir After 1.5 hours, it turns into a colloid. Put the colloid in an oven and dry it at 120°C. Grind the cooled dry solid until it has no large lumps, put it in a muffle furnace, and bake it at 1000°C. Keep it warm for 3 hours. Take out the roasted The solid is further ground into powder to obtain the spinel o...

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Abstract

The invention provides a preparation method of a loaded cobalt catalyst, and relates to a cobalt-containing catalyst. The preparation method includes the steps that a spinel-type oxide CoAl2O4 is prepared through a sol-gel method; then, the oxide is loaded on the surface of sepiolite ore nanofiber through an impregnation method, and a CoAl2O4 / sepiolite ore nanofiber composite is obtained; then, the composite is reduced in a reducing atmosphere, and a cobalt / CoAl2O4 / sepiolite ore nanofiber composite, namely, the loaded cobalt catalyst formed by the CoAl2O4 / sepiolite ore nanofiber composite loaded with cobalt is obtained. The defects of an existing loaded cobalt catalyst that the preparation process is complex, the reaction energy consumption is high, and a product is poor in high-temperature stability and prone to agglomeration at a high temperature are overcome.

Description

technical field [0001] The technical scheme of the present invention relates to a catalyst containing cobalt, in particular to a preparation method of a supported metal cobalt catalyst. Background technique [0002] People's research on noble metal catalysts started earlier, and at the same time, they have been researched deeply. Noble metal combustion catalysts including noble metals or supported noble metal oxide catalysts have good low-temperature activity, but noble metals are expensive, which limits their use in the field of catalysis to a certain extent. Metal iron is more abundant and cheaper than cobalt, which is conducive to the formation of low-carbon olefins. However, Fe catalysts have high activity for water gas shift reactions and poor chain growth capabilities. Fe catalysts are prone to carbon deposition and poisoning when the reaction temperature is high. Metal Ni has a tendency to conflict with the loss of hydroxyl compounds and the tendency of methanation d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/75B01J37/03B01J37/08B01J37/04B01J37/18
CPCB01J23/005B01J23/75B01J37/036B01J37/04B01J37/08B01J37/086B01J37/18
Inventor 王菲张婷婷梁金生汤庆国张卉朱毛毛
Owner HEBEI UNIV OF TECH
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