Particulate Carbon Fractionation by Specific Surface Area
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Solution Overview
Problem
Existing methods fail to effectively separate particulate carbon materials into fractions with more homogeneous specific surface areas, as they are often agglomerated and have similar densities, making conventional classification methods inadequate.
Innovation Solution
A process involving gravity separation, such as cyclone separation in liquid or gaseous phases, followed by additional classification, allows for the separation of particulate carbon materials into fractions with significantly different specific surface areas, maintaining particle size distribution homogeneity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If classification processes such as screening or air classifying are used to separate particulate carbon materials by size, then separation of fractions is achieved, but the process cannot distinguish between large primary particles and agglomerates of smaller primary particles, resulting in non-homogeneous fractions
Solution Approach 1:
The invention changes the measurement parameter from particle size (which cannot distinguish agglomerates) to specific surface area (which can distinguish primary particles from agglomerates). By using specific surface area as the separation criterion instead of particle size, the process achieves homogeneous fractions with uniform primary particle sizes.
Solution Approach 2:
The invention replaces mechanical classification methods (screening, air classifying) with a gravity-based separation system that uses specific surface area as the differentiating factor. This substitution allows separation based on the intrinsic property of primary particles rather than their agglomerated state.
2Manufacturing precision
If HTC or precipitation processes are used to produce particulate carbon materials, then production is achieved, but desired high specific surface areas cannot be obtained within commercially acceptable limits
Solution Approach 1:
The invention segments the particulate carbon material into fractions with different specific surface areas, separating high surface area primary particles from lower surface area agglomerates. This segmentation allows the high-value fraction to be produced and utilized without requiring complete transformation of the entire production process.
Solution Approach 2:
The invention extracts the high specific surface area fraction from the mixed particulate carbon material produced by HTC or precipitation. By taking out and separating this valuable fraction, the process achieves high-quality material without requiring complete process re-engineering.
3Quantity of substance
If existing separation processes are used, then separation of fractions is achieved, but the processes are inadequate for distinguishing between primary particles and agglomerates, leading to non-homogeneous fractions
Solution Approach 1:
The invention changes the separation parameter from particle size to specific surface area, enabling effective distinction between primary particles and agglomerates. This parameter change transforms the separation process from one that produces heterogeneous fractions to one that produces homogeneous fractions with uniform primary particle characteristics.
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 process enables the production of more homogeneous fractions with higher or lower specific surface areas, suitable for demanding applications, while maintaining particle size distribution, and is cost-effective without complex adaptations.
Implementation Method 1
A process involving gravity separation, using cyclones or classifiers, to split particulate carbon materials into fractions with significantly different specific surface areas
Data Source
AI summary
The present invention relates to a process for separating particulate carbon materials and to the materials obtained thereby as well as to their use.