Magnesium nickel-petroleum coke activated carbon composite hydrogen storage material and preparation method thereof

A technology of coke activated carbon and hydrogen storage material, which is applied in the field of magnesium nickel-petroleum coke activated carbon composite hydrogen storage material and its preparation, and can solve the problems of restricting practical use, plastic deformation failure of the reaction bed, and low density.

Pending Publication Date: 2021-05-11
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its high thermal stability and poor hydrogen absorption and desorption kinetics restrict its practical use.
At the same time, the method of filling a single hydrogen storage alloy will cause the expansion stress of the alloy in the bed to increase with the number of cycles, which will result in a profit aggregation effect and cause the reaction bed to fail due to plastic deformation.
[0004] In view of the above problems, the mixed filling of heat-conducting materials such as foam metal and hydrogen storage alloys is a conventional method to improve the heat transfer rate of hydrogen absorption and desorption of hydrogen storage alloys, but the overall mass hydrogen storage density is greatly reduced.
Carbon materials, especially carbon nanotubes, have the characteristics of low density, low cost, high thermal conductivity, etc., and can also effectively increase the rate of hydrogen absorption and desorption. However, there are still great difficulties in the preparation of nanomaterials with complex processes, high costs, and completely uniform loading.

Method used

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  • Magnesium nickel-petroleum coke activated carbon composite hydrogen storage material and preparation method thereof
  • Magnesium nickel-petroleum coke activated carbon composite hydrogen storage material and preparation method thereof
  • Magnesium nickel-petroleum coke activated carbon composite hydrogen storage material and preparation method thereof

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Effect test

Embodiment 1

[0039] A kind of preparation method of magnesium nickel-petroleum coke activated carbon composite hydrogen storage material, see figure 1 ,include:

[0040] Step 1: Petroleum coke activated carbon preparation:

[0041] 11) Take high-sulfur petroleum coke with a mass ratio of 1:3 and mix it with KOH, put it into a tube furnace for chemical activation and high-temperature carbonization under the protection of high-purity nitrogen: raise the temperature to 400°C at a heating rate of 5°C / min Keep it for 1h for chemical activation, then raise it to 800°C and keep it for 1h for high-temperature carbonization, and cool it to room temperature for later use;

[0042] 12) Add 1mol / L HCl solution to the mixture to adjust pH=7;

[0043] 13) Grinding the activated carbon to an average particle size of 100 μm after drying;

[0044] Step 2: Preparation of Mg-Ni hydrogen storage alloy:

[0045] 21) Put Mg powder and Ni powder with a mass ratio of 84:16 in a ball mill, and conduct ball mil...

Embodiment 2

[0057] A preparation method of a magnesium-nickel-petroleum coke activated carbon composite hydrogen storage material, comprising:

[0058] Step 1, step 2 are all identical with step 1-2 in embodiment 1;

[0059] Step 3: Loading of Composite Hydrogen Storage Material:

[0060] 31) Put petroleum coke activated carbon and Mg-Ni hydrogen storage alloy with a mass ratio of 1:9 on a shaker in a glove box, vibrate and mix in an argon atmosphere for 0.h, and then place it in a muffle furnace protected by an argon atmosphere High temperature sintering, the sintering temperature is 1500°C, and the time is 1h;

[0061] 32) Place the sintered composite hydrogen storage material in a hydrogenation reactor for activation treatment. The hydrogenation temperature is 220°C, the hydrogen pressure is 2Mpa, and the hydrogen absorption and desorption time is set at 10 minutes. A total of 5 hydrogen absorption and desorption cycles are performed, and the surface powder is discarded;

[0062] 33)...

Embodiment 3

[0064] A preparation method of a magnesium-nickel-petroleum coke activated carbon composite hydrogen storage material, comprising:

[0065] Step 1, step 2 are all identical with step 1-2 in embodiment 1;

[0066] Step 3: Loading of Composite Hydrogen Storage Material:

[0067] 31) Put petroleum coke activated carbon and Mg-Ni hydrogen storage alloy with a mass ratio of 1:4 on a shaker in a glove box, vibrate and mix in an argon atmosphere for 1 hour, and then place it on a muffle furnace protected by an argon atmosphere at high temperature Sintering, the sintering temperature is 1500°C, and the time is 2h;

[0068] 32) Place the sintered composite hydrogen storage material in a hydrogenation reactor for activation treatment, the hydrogenation temperature is 250°C, the hydrogen pressure is 1Mpa, the hydrogen absorption and desorption time is set at 10min, a total of 5 hydrogen absorption and desorption cycles are performed, and the surface powder is discarded;

[0069] 33) Pu...

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Abstract

The invention relates to a magnesium nickel-petroleum coke activated carbon composite hydrogen storage material and a preparation method thereof, and belongs to the technical field of hydrogen storage alloy materials. The method comprises the following steps: 1, preparing petroleum coke activated carbon; 2, preparing Mg-Ni hydrogen storage alloy; and 3, loading the composite hydrogen storage material: 31) uniformly mixing the petroleum coke activated carbon prepared in the step 1 with the Mg-Ni hydrogen storage alloy prepared in the step 2, and then placing the mixture on a muffle furnace protected by an argon atmosphere for high-temperature sintering; 32) placing the sintered composite hydrogen storage material in a hydrogenation reactor for activating treatment; and (33) putting the activated composite hydrogen storage material into a tablet press, and extruding the composite hydrogen storage material into a cylindrical shape. The spherical cage effect can be generated by means of dense apertures and gaps of the petroleum coke activated carbon, discrete aggregation of the pulverized hydrogen storage alloy is efficiently limited, and the magnesium nickel-petroleum coke activated carbon composite hydrogen storage material has the advantages of being high in hydrogen storage capacity, high in hydrogen absorption and desorption rate, low in strain accumulation and the like.

Description

technical field [0001] The invention relates to the technical field of hydrogen storage alloy materials, and specifically provides a magnesium nickel-petroleum coke activated carbon composite hydrogen storage material and a preparation method thereof. Background technique [0002] Energy is an important basis for the survival of human society. The fossil fuels currently used in large quantities are non-renewable and seriously polluting, which has brought different degrees of energy challenges to countries around the world. Finding alternatives to renewable and clean energy has become an inevitable trend of economic development. Among them , hydrogen energy is considered to be one of the most promising energy sources in the future. Many countries are stepping up research and development and implementation of hydrogen energy technology. Therefore, research on hydrogen energy technology is very important for efficient energy conversion, solving energy crises, and reducing enviro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/00
CPCC01B3/0078Y02E60/32
Inventor 常景彩董泽正马春元吴浩然李一帆孙悦
Owner SHANDONG UNIV
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