Argon Recovery via Compression Heat Catalysis
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Solution Overview
Problem
Current methods for recovering and purifying argon gas from silicon single crystal manufacturing apparatuses are complex and costly, requiring high-pressure facilities and energy-intensive processes, which complicate the removal of impurity gases like nitrogen, oxygen, and carbon monoxide from large air volumes.
Innovation Solution
A two-stage compressor with integrated catalysts uses compression heat for catalytic reactions to convert oxygen and carbon monoxide into water and carbon dioxide, followed by adsorption in an ordinary-temperature adsorption tower, removing impurities with minimal energy input and avoiding the need for external cooling devices or high-pressure systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional purification methods are used, then impurity gases can be removed from argon gas, but the facility becomes complex and costs increase
Solution Approach 1:
The patent combines the catalytic conversion function and adsorption function into a single integrated device. The adsorption device contains both the catalytic conversion unit (with catalyst layer) and the adsorption unit (with adsorbent layer) in sequence, allowing impurity gases to be converted and adsorbed in one pass without requiring separate high-pressure facilities and cooling devices
Solution Approach 2:
The adsorption device serves multiple functions simultaneously: it acts as a catalytic converter for CO and O2, an adsorbent for removing converted gases and nitrogen, and a purification system for producing high-purity argon. This multi-functionality eliminates the need for separate dedicated facilities for each function
2Reliability
If high-pressure facilities and cooling devices are used, then purification process can be completed, but energy consumption increases
Solution Approach 1:
The catalytic conversion unit utilizes the heat generated during catalytic reactions (oxidation of CO and O2) to maintain the reaction temperature, eliminating the need for external heating or cooling devices. The system is self-sustaining through the exothermic nature of the catalytic reactions
Solution Approach 2:
The patent extracts and removes the energy-intensive high-pressure facility and cooling device from the purification system. By using atmospheric pressure operation and the self-heating catalytic conversion, the system eliminates these energy-consuming components while maintaining effective impurity removal
3Reliability
If conventional adsorption methods are used, then nitrogen can be removed, but adsorbent life is shortened due to moisture adsorption
Solution Approach 1:
The catalytic conversion unit is positioned before the adsorption unit in the gas flow path. This preliminary conversion of CO and O2 into CO2 and H2O, followed by adsorption of these converted gases in the same device, prevents moisture from accumulating and degrading the adsorbent over time
Solution Approach 2:
The catalytic conversion unit acts as an intermediary between the incoming argon gas and the adsorption unit. It converts potentially harmful gases (CO, O2) into forms that can be effectively adsorbed, protecting the adsorbent from direct exposure to substances that would cause rapid degradation
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 approach stabilizes the removal of impurities from large argon gas volumes with a simple, low-cost facility, prolonging adsorbent life and reducing operational and construction costs while maintaining high-purity argon gas production.
Implementation Method 1
converting the oxygen into water and converting the carbon monoxide into carbon dioxide by a catalytic reaction
Implementation Method 2
removing the water, the carbon dioxide, and the nitrogen
Implementation Method 3
the catalytic reaction is carried out with compression heat alone
Data Source
AI summary
An argon gas recovering and purifying method including: introducing waste argon gas containing nitrogen, oxygen, and carbon monoxide from silicon single crystal manufacturing apparatus into waste argon gas storage tank; removing solid matters in pretreatment facility which removes the solid matters in waste argon gas; converting oxygen into water and converting carbon monoxide into carbon dioxide by catalytic reaction; removing the water, the carbon dioxide, and the nitrogen to obtain recovered gas, in the argon gas recovering and purifying method and an argon gas recovering and purifying apparatus, the catalytic reaction is carried out with compression heat alone by arranging a catalyst in a two-stage compressor, and the water is removed by a dryer in advance and then the nitrogen and the carbon dioxide are adsorbed and removed in an ordinary-temperature adsorption tower at the step of obtaining the recovered gas.