A method for the preparation of a porous catalyst
By preparing highly permeable porous catalysts, the problems of small catalyst specific surface area and difficulty in gas or liquid entry were solved, achieving full contact between the catalyst and reactants, and improving catalytic efficiency and reaction stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHAANXI ZHIXIN CHUANGJIA TECHNOLOGY CO LTD
- Filing Date
- 2025-01-28
- Publication Date
- 2026-07-31
AI Technical Summary
In existing hydrogen production and storage technologies, the catalyst has a small specific surface area, making it difficult for gas or liquid to enter the catalyst, resulting in low catalytic efficiency and fluctuations.
A highly permeable porous catalyst was prepared by mixing the catalyst with a dispersant, solvent, and binder, followed by ball milling, sponge adsorption, drying in a drying kiln, and then calcining at high temperature to form a honeycomb structure.
This increases the specific surface area of the catalyst, ensuring sufficient contact between the gas or liquid and the catalyst, thereby improving catalytic efficiency and stabilizing the reaction process.
Smart Images
Figure CN122479822A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of new energy, specifically to the field of hydrogen production and storage technology, and specifically relates to the preparation method of porous catalysts for hydrogen production by metal cracking steam and hydrogen storage by organic liquids. Background Technology
[0002] With the development of society and economy, traditional fossil energy has been consumed in large quantities, resulting in massive carbon emissions and the greenhouse effect. How to reduce carbon emissions and achieve carbon neutrality has become a major challenge facing the world today. Hydrogen energy is an important clean energy source that meets the needs of sustainable development and environmental friendliness for human society, and its development has entered a period of rapid growth. However, there are still many constraints in the production, storage and transportation of hydrogen. Many laboratory products and technologies encounter process instability during industrialization, causing good technologies to be slow to be transformed.
[0003] In the field of hydrogen production, CN 115010086 A discloses a cracking agent for hydrogen production, its preparation method, and a method for using it to produce hydrogen, wherein the cracking agent is produced by compression molding; CN 115818568 A discloses a cracking agent for producing hydrogen from cracked water vapor, its preparation, use, and reactivation method, wherein the cracking agent is produced by compression molding at 4-5 atmospheres; CN 117466246 A discloses a cracking agent for hydrogen production and its preparation method, wherein the cracking agent is produced by high-temperature calcination at 1000°C-1600°C. Regarding hydrogen storage technology, CN 115318281 A discloses a supported dehydrogenation catalyst for heterocyclic compound dehydrogenation and its preparation method; CN 115337870 A discloses a conical rotating packed bed dehydrogenation reactor suitable for organic liquid hydrogen storage; CN 115254141 A discloses a catalyst with micro-precious metal loading, its preparation method, and its application; CN114700075 A discloses a preparation method of a multi-component catalyst, the multi-component catalyst, and its application; CN 114733530A discloses a hydrogenation catalyst for an organic liquid hydrogen storage support, its preparation method, and its application. The cracking agents or catalysts obtained by the above methods have the following disadvantages in industrial production: 1. The contact area between the gas or liquid and the catalyst is small; 2. Gases or liquids do not easily penetrate the interior of the catalyst; 3. The catalyst efficiency is not high, and the catalytic performance fluctuates. Summary of the Invention
[0004] To address the shortcomings of existing technologies, this invention provides a method for preparing a highly permeable porous catalyst, the specific scheme of which is as follows: A method for preparing a porous catalyst, comprising a catalyst, a dispersant, a solvent, a binder, and a sponge; wherein the amount of dispersant added is 0.3-2 wt% of the catalyst mass, the amount of solvent added is 25-80 wt% of the catalyst mass, and the amount of binder added is 0-20 wt% of the catalyst mass; the preparation method is as follows: Step 1. Weigh a certain amount of catalyst, add the appropriate proportion of dispersant and solvent, put it into a high-speed ball mill and ball mill it to a certain fineness, pass it through an 80-mesh sieve, and obtain an aqueous suspension A of the catalyst; Step 2. Add the appropriate proportion of binder to suspension A and stir evenly to obtain suspension B; Step 3. Use a sponge to absorb suspension B. Place the sponge with the absorbed suspension B into a tray and send it into a drying kiln to dry into a sponge cake at 100-180 degrees Celsius. Step 4. Calcine the sponge cake from Step 3 at 250-900 degrees Celsius. After the sponge burns off, a catalyst product with high permeability is obtained.
[0005] As mentioned above, the catalyst is one of the following: metal cracking steam hydrogen production catalyst, organic liquid hydrogenation catalyst, organic liquid dehydrogenation catalyst, and other gas-liquid reaction catalyst.
[0006] The dispersant is one of sodium tripolyphosphate, potassium tripolyphosphate, sodium metasilicate, water glass, sodium polyacrylate, polycarboxylic acid, polyether, or amino dispersant.
[0007] The solvent is one of water, alcohol solvents, ether solvents, alcohol-ether solvents, or alkane solvents.
[0008] The adhesive is one of sodium carboxymethyl cellulose, polyvinyl butyral, polyvinyl acetate emulsion, styrene-acrylic emulsion, silicone-acrylic emulsion, acrylic emulsion, polyester emulsion, or epoxy emulsion.
[0009] The sponge is a common porous material with water absorption properties.
[0010] Compared with the prior art, the present invention can achieve the following technical effects: 1. This invention can effectively increase the specific surface area of the catalyst; 2. The catalyst prepared by the method of the present invention has a honeycomb structure with good air permeability, which allows the catalytic active components to fully contact and react with the gas or liquid, effectively improving the catalytic efficiency; 3. The method for preparing a highly permeable porous catalyst provided by the present invention allows the catalyst to be manufactured according to the shape requirements of the equipment, fully meeting the process requirements and improving the stability of the catalytic reaction process.
[0011] Attached image description: Figure 1 This is a diagram showing the appearance of the catalyst of the present invention. Detailed Implementation
[0012] The embodiments of the present invention will be described in detail below with reference to the examples. The following examples are only used to illustrate the present invention and should not be regarded as limiting the scope of the present invention.
[0013] Example 1: 100g catalyst, 1g sodium tripolyphosphate dispersant, 35g water, 20g polyvinyl acetate emulsion binder, and EVA medium-density foamed sponge.
[0014] Its preparation method is as follows: Step 1. Add the catalyst, sodium tripolyphosphate, and water to a high-speed ball mill and ball mill for 8 minutes. Then pass the mixture through an 80-mesh sieve to obtain an aqueous suspension A of the catalyst. Step 2. Add polyvinyl acetate emulsion to suspension A and stir until homogeneous to obtain suspension B; Step 3. Use a sponge to absorb suspension B. Place the sponge with the absorbed suspension B into a tray and send it into a drying kiln to dry into a sponge cake at 100-180 degrees Celsius. Step 4. Calcine the sponge cake from Step 3 at 350-400 degrees Celsius. After the sponge burns off, a highly permeable catalyst product is obtained.
[0015] Example 2: 100g catalyst, 1g Sima Chemical PC-67 dispersant, 50g ethanol, 0.2g sodium carboxymethyl cellulose binder, and EVA medium-density foamed sponge.
[0016] Its preparation method is as follows: Step 1. Add the catalyst, PC-67, sodium carboxymethyl cellulose, and ethanol to a high-speed ball mill and ball mill for 8 minutes. Then pass the mixture through an 80-mesh sieve to obtain an ethanol suspension A of the catalyst. Step 2. Use a sponge to absorb suspension A. Place the sponge with the absorbed suspension A into a tray and send it into a drying kiln to dry into a sponge cake at 80-120 degrees Celsius. Step 3. Calcine the sponge cake from Step 2 at 350-400 degrees Celsius. After the sponge burns off, a catalyst product with high permeability is obtained.
[0017] Example 3: 100g catalyst, 1g Sima Chemical PC-67 dispersant, 50g ethanol, 0.5g polyvinyl butyral binder, and EVA medium-density foam sponge.
[0018] Its preparation method is as follows: Step 1. Add the catalyst, PC-67, polyvinyl butyral, and ethanol to a high-speed ball mill and ball mill for 8 minutes. Then pass the mixture through an 80-mesh sieve to obtain an ethanol suspension A of the catalyst. Step 2. Use a sponge to absorb suspension A. Place the sponge with the absorbed suspension A into a tray and send it into a drying kiln to dry into a sponge cake at 80-120 degrees Celsius. Step 3. Calcine the sponge cake from Step 2 at 350-400 degrees Celsius. After the sponge burns off, a catalyst product with high permeability is obtained.
Claims
1. A method for preparing a porous catalyst, characterized in that... It includes a catalyst, solvent, dispersant, binder, and sponge; wherein the amount of dispersant added is 0.3-2 wt% of the catalyst mass, the amount of solvent added is 25-80 wt% of the catalyst mass, and the amount of binder added is 0-20 wt% of the catalyst mass; the preparation method is as follows: Step 1. Weigh a certain amount of catalyst, add the appropriate proportion of dispersant and solvent, put it into a high-speed ball mill and ball mill it to a certain fineness, pass it through an 80-mesh sieve, and obtain the catalyst solvent suspension A; Step 2. Add the appropriate proportion of binder to suspension A and stir evenly to obtain suspension B; Step 3. Use a sponge to absorb suspension B. Place the sponge with the absorbed suspension B into a tray and send it into a drying kiln to dry into a sponge cake at 100-180 degrees Celsius. Step 4. Calcine the sponge cake from Step 3 at 250-900 degrees Celsius. After the sponge burns off, the porous catalyst product is obtained.
2. The method for preparing a porous catalyst according to claim 1, characterized in that, The catalyst is one of the following: metal cracking steam hydrogen production catalyst, organic liquid hydrogenation catalyst, organic liquid dehydrogenation catalyst, and other gas-liquid reaction catalysts.
3. The method for preparing a porous catalyst according to claim 1, characterized in that, The dispersant is one of sodium tripolyphosphate, potassium tripolyphosphate, sodium metasilicate, water glass, sodium polyacrylate, polycarboxylic acid, polyether, or amino dispersant.
4. The method for preparing a porous catalyst according to claim 1, characterized in that, The solvent is one of deionized water, alcohol solvents, ether solvents, alcohol-ether solvents, or alkane solvents.
5. The method for preparing a porous catalyst according to claim 1, characterized in that, The adhesive is one of sodium carboxymethyl cellulose, polyvinyl butyral, polyvinyl acetate emulsion, styrene-acrylic emulsion, silicone-acrylic emulsion, acrylic emulsion, polyester emulsion, or epoxy emulsion.
6. The method for preparing a porous catalyst according to claim 1, characterized in that, The sponge is a common porous material with water absorption properties.