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Preparation method of dual-scale porous perovskite for chemical-looping hydrogen production

A dual-scale, porous calcium technology, applied in the field of materials, can solve the problem of uncontrollable product pore size and other problems, and achieve the effects of enhanced surface reaction kinetics, uniform heating, and low optical thickness

Inactive Publication Date: 2021-05-28
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method also cannot control the pore size of the product.

Method used

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  • Preparation method of dual-scale porous perovskite for chemical-looping hydrogen production
  • Preparation method of dual-scale porous perovskite for chemical-looping hydrogen production
  • Preparation method of dual-scale porous perovskite for chemical-looping hydrogen production

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with specific examples.

[0029] The invention provides a method for preparing a dual-scale porous perovskite for chemical chain hydrogen production, comprising the following steps:

[0030] Step 1. Pretreatment of polyurethane sponge:

[0031] First put the polyurethane sponge in a NaOH solution with a mass fraction of 10%, and soak it in a water bath at a constant temperature of 40°C for 24 hours to improve the adhesion between the polyurethane sponge and the slurry solution, and make the slurry and the polyurethane sponge The adsorption is stronger.

[0032] Step 2. Preparation of ABO 3 Type perovskite powder:

[0033] Using the solid-state reaction method, mix the carbonate of the A-site element with the oxide of the B-site element, add absolute ethanol to adjust the weight, ball mill for 24 hours, then take it out and dry it at 70°C for 24 hours, and then grind it to 100 mesh. get ABO 3 type ...

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Abstract

The invention discloses a preparation method of dual-scale porous perovskite for chemical looping hydrogen production. The preparation method comprises the following steps: step 1, pretreating polyurethane sponge; step 2, mixing the carbonate of the A-site element with the oxide of the B-site element, adding absolute ethyl alcohol to adjust the weight, carrying out ball milling for 24 hours, then taking out, drying, and grinding to 100 meshes to obtain ABO3 type perovskite powder; preparing slurry according to a mass ratio of ABO3 type perovskite to water of 2: 1, and adding a binder PVA solution to obtain a slurry solution; and step 3, immersing the pretreated polyurethane sponge in the slurry solution for 24 hours, taking out the polyurethane sponge, extruding the polyurethane sponge to remove the redundant slurry solution, drying the polyurethane sponge body coated with the slurry, and sintering at 950 DEG C for 5 hours to obtain the dual-scale porous perovskite. According to the invention, dual-scale porous perovskite can be prepared, and effective volume radiation absorption is improved while perovskite surface reaction kinetics is enhanced.

Description

technical field [0001] The invention belongs to the field of materials, and relates to a method for preparing perovskite, in particular to a method for preparing double-scale porous perovskite for chemical chain hydrogen production. Background technique [0002] ABOs 3 Type perovskite has a stable crystal structure, unique electromagnetic properties, and activities such as redox and hydrogenolysis based on oxygen transport. The porous perovskite material itself has a high specific surface area and excellent gas adsorption and desorption characteristics. When inside the heat absorber, the temperature required by the perovskite material can be reached through solar thermal radiation, so as to realize the transfer and transportation of oxygen. Use porous materials with oxygen permeability to carry out H 2 O or CO 2 The thermochemical cracking of the fuel, so as to realize the synthetic production of fuel, CO 2 Digestion or O 2 Many options, such as the generation of solar ...

Claims

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Application Information

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IPC IPC(8): C01G51/00
CPCC01G51/006C01G51/66C01P2002/72C01P2004/03C01P2004/61
Inventor 王沛魏荣阔张汉卿刘天添
Owner HOHAI UNIV