Composite catalyst with hollow core-shell structure and preparation method thereof
A composite catalyst and core-shell structure technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of composite catalyst structure collapse and low utilization rate of CaO problem, to achieve the effect of easy control of synthesis conditions, increase of methane conversion rate and increase of H2 concentration
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Example Embodiment
[0033] The present invention also provides a method of preparing a hollow core shell structure composite catalyst comprising the steps of:
[0034] 1) Mix the calcium salt, aluminum salt, citric acid and water to obtain a gel;
[0035]2) The gel is sequentially dried, calcined, carbonated to obtain a carbonated adsorption component;
[0036] 3) Mix the carbonated adsorption component, ethanol, surfactant, and silicon salt to obtain emulsion, hydrolyzate the emulsion, to extract, to obtain a first filter residue;
[0037] 4) After mixing the first filter, the surfactant, the etchant, and water, and the filtration is filtered, and the second filter residue is obtained.
[0038] 5) After mixing the second filter, the surfactant, the nickel salt, and water, and the reflected filter residue was dried, calcined, and obtained the hollow nuclear shell structure composite catalyst.
[0039] Step 1) The calcium salt preferably comprises one or more of nitrate, calcium acetate, calcium sulfate
Example Embodiment
[0054] Example 1
[0055] The molar ratio of 1: 0.03: 5 is dissolved in deionized water, and the concentration of calcium ions in the obtained solution is 0.3 mol / L, and the solution is stirred at 80 ° C for 7 h to form a gel. The resulting gel was dried at 125 ° C for 18 h, then the adsorption component was obtained at 850 ° C for 1.5 h, and the adsorption component was in CO. 2 The atmosphere was tested for 5 h at 750 ° C for 5 h to obtain a carbonated adsorption component.
[0056] The carbonated adsorption group was dispersed in ethanol (the mass concentration of ethanol) was added, and the ammonia water was added to 10 to obtain a mixture. Add hexadalkyltrimel bromide and orthodoxy ester mix well to the mixture, and the concentration of n-hexamethyltrimethylammonium bromide is 2.5 mmol / L in the emulsion, emulsion. The concentration of calcium ions is 0.3 mol / L, the molar ratio of calcium ions and silicon ions is 1: 0.02. The emulsion was hydrolyzed at 30 ° C for 5 h,
Example Embodiment
[0059] Example 2
[0060] The molar ratio of 1: 0.1: 1.5 was dissolved in deionized water, and the concentration of calcium ions in the obtained solution was 1 mol / L, and the solution was stirred at 60 ° C for 8 h to form condensation. Glue, the resulting gel was dried at 100 ° C for 24 h, then baked for 3 h at 750 ° C to obtain an adsorption component, and the adsorption component was in CO. 2 The atmosphere was tested for 4 h at 720 ° C for 4 h to obtain a carbonated adsorption component.
[0061] The carbonated adsorption group was dispersed in ethanol (the mass concentration of ethanol was 96%), and the ammonia water was added to 10 to obtain a mixture. The addition of hexadalkyltrimel bromine and orthodoxy ester is mixed into the mixture, and the concentration of n-hexamethyltrimethylammonium bromide is 4 mmol / L in emulsion, emulsion. The concentration of calcium ions was 0.5 mol / L, the molar ratio of calcium ions and silicon ions was 1: 0.07. The emulsion was hydrol
PUM
Property | Measurement | Unit |
---|---|---|
Concentration | aaaaa | aaaaa |
Particle size | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap