Spherical Activated Carbon Catalyst with Surface Oxidation
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Solution Overview
Problem
Conventional catalyst systems based on finely divided activated carbon suffer from inadequate performance characteristics, including low porosity, high pressure drops, and difficulty in recycling due to mechanical instability and poor catalyst loading, leading to suboptimal catalytic activity and increased costs.
Innovation Solution
A catalyst system utilizing spherical activated carbon subjected to surface oxidation before loading with a catalytically active component, followed by reduction, to enhance mechanical stability and catalytic activity, allowing for improved loading and durability of the catalyst.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If conventional finely divided activated carbon is used as catalyst carrier, then high surface area is achieved, but mechanical stability deteriorates and pressure drops increase
Solution Approach 1:
The patent applies spheroidality by transforming the catalyst carrier from finely divided irregular particles to spherical granules with diameter of 0.5-5 mm. This spherical shape provides mechanical stability while maintaining high surface area through controlled porosity, resolving the contradiction between surface area and mechanical stability.
Solution Approach 2:
The patent utilizes porous spherical activated carbon with controlled pore structure to maintain high surface area while achieving mechanical stability. The porous structure provides extensive catalytic surface area within the spherical granules, preventing the need for fine division that would compromise mechanical stability.
2Ease of manufacture
If conventional activated carbon is used without surface oxidation, then simple preparation is maintained, but catalyst loading efficiency deteriorates
Solution Approach 1:
The patent applies preliminary action by performing surface oxidation on the spherical activated carbon before catalyst loading. This pre-treatment creates oxygen-containing functional groups on the surface that enhance catalyst anchoring and loading efficiency, while the oxidation step is integrated into the preparation process to maintain overall simplicity.
3Productivity
If spherical activated carbon is used with surface oxidation and reduction, then catalytic activity is enhanced, but process complexity increases
Solution Approach 1:
The patent applies parameter changes by modifying the surface chemical state through oxidation and reduction treatments. These parameter changes (surface oxidation state, porosity structure) enhance catalytic activity by creating favorable surface conditions for catalyst anchoring and reaction, while the treatments use standard chemical processes to limit complexity increase.
4Speed
If finely divided activated carbon is used, then high porosity is achieved, but pressure drops increase and recycling becomes difficult
Solution Approach 1:
The patent applies spheroidality by using spherical granules with diameter of 0.5-5 mm instead of finely divided particles. This spherical shape with controlled size distribution maintains adequate mass transfer through the porous structure while significantly reducing pressure drops and enabling easy recycling by filtration or sedimentation.
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
The spherical activated carbon catalyst system achieves enhanced catalytic activity, improved mechanical stability, and reduced pressure drops, enabling efficient and cost-effective catalytic processes with simplified recycling and handling.
Implementation Method 1
a spherical activated carbon employed as catalyst carrier is subjected to an oxidation, in particular a surface oxidation
Implementation Method 2
the activated carbon thus obtained, which is preferably in the form of a multiplicity of spherical particles of activated carbon, is contacted, in particular wetted and/or loaded and/or covered, with an optionally dissolved and/or dispersed catalytically active component
Implementation Method 3
wherein subsequently any solvent and/or dispersant medium used for dissolving and/or dispersing any catalytically active component in excess and/or not taken up by the activated carbon can be removed and/or separated off
Data Source
AI summary
The invention relates to a method for producing a catalyst system having at least one catalytically active component, wherein the catalytically active component comprises at least one metal, wherein first a spherical activated carbon used as a catalyst carrier is subjected to an oxidation. Subsequently, the catalytically active component is applied, optionally followed by a reduction of the catalyst system obtained in said manner.