Plasma Reactor Flow-Forming Elements for Stable High Throughput
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Solution Overview
Problem
Existing plasma reactors struggle to maintain stable, non-thermal plasmas at high gas throughputs and velocities, leading to plasma breakdown and inefficient energy use due to excessive heating and gas flow interference.
Innovation Solution
A plasma reactor with flow-forming elements that create a reduced velocity zone within the gas stream, allowing for stable plasma production and low thermal load on the reactor, combined with microwave excitation for efficient energy input and high gas velocities up to several meters per second.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high gas throughputs and high gas flow velocities are achieved, then productivity is improved, but the plasma becomes unstable and breaks down
Solution Approach 1:
The patent applies local quality by creating a flow-reduced zone with lower velocity within the high-velocity gas stream. This localized modification allows the plasma to remain stable in the low-velocity region while the overall system maintains high throughput. The flow-forming element generates a recirculation pattern that produces this protected zone where plasma can exist without being disrupted by the main high-speed flow.
2Temperature
If thermal plasma jets are used to achieve high gas temperatures, then gas reactions are enhanced, but energy consumption increases significantly
Solution Approach 1:
The patent changes the fundamental parameter of plasma temperature from thermal (high gas temperature) to non-thermal (low gas temperature with excited species). Instead of heating the bulk gas to several thousand Kelvin, the invention maintains the gas at or near ambient temperature while creating a plasma with highly energetic electrons and excited molecules that can drive chemical reactions efficiently without the energy waste of bulk heating.
3Productivity
If gas flow velocity is increased to improve throughput, then productivity increases, but the plasma is pushed out of the chamber and extinguished
Solution Approach 1:
The patent creates a localized flow-reduced zone where the gas velocity is significantly lower than the main stream velocity. This local modification of flow conditions allows the plasma to be maintained in this protected region even while the overall system operates at high throughput. The recirculation pattern generated by the flow-forming element ensures that fresh gas is continuously supplied to this low-velocity zone without the plasma being blown out.
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 solution enables stable, long-term operation with high gas throughputs and efficient energy use, achieving high degrees of conversion and yields in gas reactions, particularly for poorly reactive gases like CO2 and nitrogen, while minimizing thermal stress on the reactor.
Implementation Method 1
a flow of gases or a flow of gasifiable substances is guided through a plasma, especially a plasma that is excited by microwaves
Implementation Method 2
Gases may flow through a device comprising a plasma reactor, particularly a cylindrical plasma reactor, to which microwaves are fed via coupling points, whereupon gas reactions may occur due to high excitation of the gases by the plasma
Data Source
AI summary
A device for carrying out gas reactions, comprising a plasma reactor with a through-flow of gases which has a, particularly cylindrical, plasma chamber, wherein flow-forming elements for forming a flow of gases are arranged before and/or in and/or after the plasma reactor in order to form a gas stream within the plasma chamber such that at least one, particularly central, zone in the gas flow is formed which is flow-reduced. A method for carrying out gas reactions is also provided.