Vertical Upward Plasma Flame Fluidized Bed Reactor for Nanomaterials
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Solution Overview
Problem
Current methods for producing metal oxide nanowires are not commercially viable due to limitations in scalability, contamination, and control over nanostructure formation, with existing techniques only allowing for small quantities and requiring expensive precursors and specialized equipment.
Innovation Solution
A reactor system featuring a fluidized bed reactor with a vertically oriented upward plasma or hydrocarbon flame, a cyclone for separation, and a dust removal unit, enabling the production of over one hundred grams of metal oxide nanomaterials per minute without the need for substrates or expensive sheath gases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If flame based synthesis techniques are used to produce nanomaterials at commercial scale, then production quantity is improved, but control over nanostructure formation deteriorates
Solution Approach 1:
The patent changes the flame orientation parameter from conventional horizontal/downward to vertical upward configuration. This parameter change enables both high productivity (over 100 grams per minute) and good control over nanowire formation, resolving the contradiction between production quantity and manufacturing precision.
Solution Approach 2:
The patent creates different local conditions within the flame reactor: the vertical upward flame provides a stable reaction zone with controlled temperature gradient, while the fluidized bed provides uniform particle distribution. This local quality differentiation enables simultaneous high production and precise nanostructure control.
2Ease of manufacture
If downward plasma flame is used to produce metal oxide nanowires, then substrate-free production is achieved, but residence time deteriorates due to fast particle movement
Solution Approach 1:
The patent inverts the conventional downward plasma flame configuration to a vertical upward flame. This inversion slows down particle movement through the reaction zone, increasing residence time while maintaining substrate-free production. The upward flame configuration allows particles to be carried more gently through the reaction zone, resolving the contradiction between ease of manufacture and residence time.
3Productivity
If additional powder feeders are used to increase production rate, then productivity is improved, but gas flow increases causing drag that reduces residence time
Solution Approach 1:
The patent transitions from horizontal/downward flame geometry to vertical upward flame geometry, adding a vertical dimension to the reaction zone. This dimensional change allows multiple powder feeders to operate simultaneously without increasing horizontal gas flow velocity, thereby maintaining residence time while improving productivity through increased powder feed capacity.
4Manufacturing precision
If liquid phase methods are used for nanowire synthesis, then nanowire formation is achieved, but scalability deteriorates and contamination increases
Solution Approach 1:
The patent replaces liquid phase synthesis methods with a gas phase flame-based synthesis system. This substitution eliminates the need for liquid solvents and multi-step processing, enabling both precise nanowire formation and scalable production. The gas phase reaction provides clean synthesis without contamination while allowing continuous processing for high productivity.
5Manufacturing precision
If gas phase techniques with catalyst clusters are used, then nanowire formation is achieved, but scalability deteriorates due to substrate requirement
Solution Approach 1:
The patent extracts the substrate requirement from the synthesis process by using a fluidized bed of metal particles instead of fixed catalyst clusters on substrates. This extraction enables nanowire formation without substrates, allowing scalable production through continuous powder feeding and collection, while maintaining controlled nanowire formation through the flame reaction zone.
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 system achieves scalable and cost-effective production of nanowires with predictable structures, significantly increasing the quantity of nanomaterials produced while minimizing contamination and operational costs.
Implementation Method 1
designed to maintain an essentially vertical upward plasma flame
Implementation Method 2
a hydrocarbon flame
Implementation Method 3
A reactor system featuring a fluidized bed reactor
Implementation Method 4
a cyclone for separation
Data Source
AI summary
The present development is a reactor system for the production of nanostructures. The reactor system comprises a conical reactor body designed to maintain an upwardly directed vertical plasma flame and hydrocarbon flame. The reactor system further includes a metal powder feed that feeds into the plasma flame, a cyclone and a dust removal unit. The system is designed to produce up to 100 grams of metal oxide nanomaterials per minute.