Continuous Graphene Reactor Flow Shear Control
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Solution Overview
Problem
Batch processes for manufacturing graphenic compounds, such as graphene oxide, suffer from batch-to-batch variability, long processing times, and difficulties in scaling, leading to inconsistent product quality and stability issues.
Innovation Solution
The implementation of continuous or semi-continuous flow processes in reactors with controlled shearing conditions allows for precise control over reactor conditions, reducing manufacturing times and improving the consistency and quality of graphenic products.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If batch processes are used to manufacture graphenic compounds, then the manufacturing process is simple to implement, but batch-to-batch variability leads to inconsistent product quality
Solution Approach 1:
The patent transitions from batch processing to continuous flow processing, where the reaction proceeds continuously through a flow reactor system. This eliminates the start-stop nature of batch processes and maintains continuous reaction conditions, thereby ensuring consistent product quality across production while maintaining ease of manufacture through a streamlined continuous system.
2Ease of manufacture
If batch processes are used to manufacture graphenic compounds, then the process setup is straightforward, but processing times are long and productivity is low
Solution Approach 1:
The continuous flow reactor enables uninterrupted processing where reactants continuously flow through the reaction zone, eliminating the idle time between batches. This continuous operation dramatically increases manufacturing throughput while the modular nature of the flow system keeps the setup straightforward and manageable.
3Productivity
If batch processes are scaled up to increase production, then larger quantities can be produced, but stability issues and phase separation occur
Solution Approach 1:
The continuous flow system divides the reaction into controlled segments along the flow path, with each section maintaining optimal mixing and reaction conditions. This segmentation prevents the large-scale heterogeneity and phase separation problems that occur when batch processes are simply scaled up, while still achieving high production quantities through continuous operation.
Solution Approach 2:
The patent utilizes flow rate, residence time, and shear rate as controllable parameters in the continuous flow reactor to optimize the reaction conditions. By precisely controlling these parameters, the system maintains suspension stability and prevents phase separation while achieving high throughput production.
4Productivity
If strongly oxidative conditions are used in batch processes, then graphenic compounds are produced, but sheet size is significantly reduced to submicron dimensions
Solution Approach 1:
The continuous flow reactor allows precise control of oxidation parameters including oxidant concentration, contact time, and shear rate. By optimizing these parameters in the flow system, the patent achieves efficient oxidation while maintaining larger graphenic sheet sizes compared to traditional batch processes, avoiding excessive fragmentation.
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
These processes significantly reduce manufacturing times, enhance product consistency, and improve quality control of graphenic products, enabling the production of larger, high-quality graphenic sheets with controlled characteristics.
Implementation Method 1
processes provided herein facilitate greater control of reactor conditions, including shearing conditions
Data Source
AI summary
Provided herein are high throughput continuous or semi-continuous reactors and processes for manufacturing graphenic materials, such as graphene. Such processes are suitable for manufacturing graphenic materials at rates that are up to hundreds of times faster than conventional techniques, and have little batch-to-batch variation. Also provided herein are graphenic compositions of matter, including large, high quality and/or highly uniform graphene.