Glass Foam Catalyst Support Eliminates Coating Layer
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Solution Overview
Problem
Current catalytic systems require heavy preparation conditions and the use of a coating layer, which complicates the process and increases energy input, and existing supported catalysts do not allow for the direct adsorption of metal nanoparticles without a coating layer.
Innovation Solution
A process for preparing supported metal nanoparticles with at least 90% of the metal in the 0 oxidation state on a glass foam support without the need for a coating layer, involving the separate preparation of glass foam and metal nanoparticles, which are then contacted and dried, allowing for controlled adsorption and eliminating the need for calcination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a coating layer is used to support metal nanoparticles, then the metal species can be fixed more effectively, but the preparation process becomes more complex and requires additional steps
Solution Approach 1:
The invention extracts and eliminates the coating layer from the catalytic system, demonstrating that glass foam supports can directly support metal nanoparticles without requiring an intermediate coating layer, thus simplifying the preparation process while maintaining effective metal fixation
Solution Approach 2:
The invention uses composite glass foam materials with specific compositions (containing PbO, ZnO, and other oxides) that provide inherent properties for direct metal nanoparticle support, combining the functions of both the original coating layer and the support structure into a single integrated material
2Reliability
If heavy preparation conditions and coating layers are used, then metal nanoparticles can be stabilized, but energy input and process complexity increase
Solution Approach 1:
The invention changes the chemical composition parameters of the glass foam support by incorporating specific metal oxides (PbO, ZnO, etc.) that provide stabilizing properties, allowing metal nanoparticles to be stabilized under milder preparation conditions without requiring high energy input
Solution Approach 2:
The glass foam support acts as an intermediary material that directly interacts with and stabilizes metal nanoparticles through its inherent chemical properties, eliminating the need for additional coating layers and reducing the overall energy requirements for catalyst preparation
3Ease of operation
If monolith supports with parallel channels are used, then implementation is facilitated and pressure losses are limited, but radial material and heat exchanges are poor
Solution Approach 1:
The invention employs glass foam material with a three-dimensional porous network structure that enables efficient radial material and heat exchanges while maintaining low pressure losses, combining the advantages of monolith implementation ease with improved mass and heat transfer properties
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method simplifies the catalyst preparation, reduces energy input, and enables direct adsorption of metal nanoparticles on the glass foam support, facilitating the use of the catalyst in catalytic processes without additional steps or layers.
Implementation Method 1
metal nanoparticles consisting of at least 90% of a metal in the oxidation state 0 adsorbed on said support
Data Source
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AI summary
Supported metal nanoparticles for catalysis. (NO FIGURE) The present invention relates to a material which comprises a glass-foam substrate onto which metal nanoparticles are adsorbed, said nanoparticles being made up of at least 90 % of one metal in oxidised state 0, the method for preparing same and the use thereof as a catalyst. The glass foam has a density of less than 1 g/cm3. The material does not comprise a coating layer between the glass foam and the metal nanoparticles. The material is obtained by a method which comprises a step of placing metal nanoparticles made up of at least 90 % of a metal in oxidation state 0, in which the metal is in oxidation state 0 in suspension in a solvent, in contact with a glass foam. The material can be used to catalyse various chemical reactions such as gas-phase reduction reactions in the presence of hydrogen, gas-phase oxidation in the presence of oxygen or ozone, gas-phase reactions in the presence of carbon dioxide or monoxide, and the breakdown of nitrous oxide.