Argon Refining via Intermittent Catalyst Feed Control
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Solution Overview
Problem
The challenge lies in refining argon gas with fluctuating concentrations of hydrogen, oxygen, and carbon monoxide impurities, where precise control of oxygen and hydrogen addition is required to achieve high-purity argon gas, while existing methods are energy-intensive and costly due to the need for metal towers and complex regeneration processes.
Innovation Solution
A method involving the intermittent addition of oxygen or hydrogen to the argon gas in a catalyst tower, monitored at the outlet, allows for proportional removal of impurities without the need for metal towers, simplifying equipment and reducing costs by using a single catalyst tower and avoiding surplus gas removal reactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If excess hydrogen and oxygen are added to carry out catalytic reaction to remove impurities, then the impurities (hydrogen, oxygen, carbon monoxide) are converted into water and carbon dioxide, but surplus hydrogen or oxygen remains after the reaction requiring additional removal steps
Solution Approach 1:
The patent employs feedback control by monitoring the composition of waste argon gas and adjusting the addition amounts of hydrogen and oxygen in real-time. This ensures that the catalytic reaction converts impurities completely without generating surplus hydrogen or oxygen, thereby eliminating the need for additional removal steps and simplifying the overall process
Solution Approach 2:
The patent changes the parameters of hydrogen and oxygen addition from fixed excess amounts to dynamically adjusted amounts based on the actual impurity composition. By matching the addition amounts to the stoichiometric requirements of the catalytic reaction, the system achieves complete conversion of impurities without surplus gas generation
2Manufacturing precision
If exact stoichiometric amounts of hydrogen and oxygen are added according to chemical formulas, then complete conversion of impurities is achieved, but it is very difficult to adjust additive amounts in correspondence with fluctuating impurity amounts
Solution Approach 1:
The system uses feedback control to automatically adjust the addition amounts of hydrogen and oxygen based on real-time monitoring of impurity levels. This eliminates the operational difficulty of manually calculating and adjusting stoichiometric amounts while maintaining precise conversion of impurities
Solution Approach 2:
The system performs self-adjustment by using the monitored impurity composition to automatically determine the required hydrogen and oxygen addition amounts. This self-service mechanism maintains precise stoichiometric conversion without requiring external manual intervention
3Quantity of substance
If excess hydrogen is added and copper oxide is used to convert surplus hydrogen and carbon monoxide, then impurities are removed, but the process requires high temperature (320°C) and additional equipment
Solution Approach 1:
The patent ensures continuous complete conversion of impurities by adding the exact stoichiometric amounts of hydrogen and oxygen from the beginning. This eliminates the need for subsequent high-temperature treatment steps, thereby reducing energy consumption continuously throughout the process
Solution Approach 2:
The patent changes the temperature parameter from high (320°C) to low by preventing surplus gas formation through precise stoichiometric control. This parameter change eliminates the need for high-temperature equipment and reduces energy consumption
4Manufacturing precision
If metal towers are used to remove surplus oxygen or hydrogen, then high-purity argon gas is achieved, but equipment cost and complexity increase
Solution Approach 1:
The patent achieves continuous complete conversion of all impurities through precise stoichiometric control of hydrogen and oxygen addition. This eliminates the need for metal towers and their associated regeneration processes, simplifying equipment structure while maintaining high purity
Solution Approach 2:
The patent extracts or eliminates the metal tower component from the system by achieving complete impurity conversion through stoichiometric control. This removal of unnecessary equipment simplifies the overall system structure and reduces complexity
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 operation of the refining apparatus, decreases energy consumption, and lowers equipment costs by eliminating the need for metal towers and complex regeneration processes, ensuring continuous refinement of argon gas with high purity.
Implementation Method 1
converting the hydrogen and the carbon monoxide into water and carbon dioxide by a catalytic reaction
Implementation Method 2
converted into a material which can be readily adsorbed by the adsorbent, e.g., water and carbon dioxide
Data Source
AI summary
A method is provided for refining an argon gas, in which oxygen is added to the argon gas containing hydrogen, carbon monoxide (CO), and oxygen as impurities so that the hydrogen and the CO are converted into water and carbon dioxide in a catalyst tower, or hydrogen is added to the argon gas so that the oxygen is converted into the water; the method including: monitoring the hydrogen, the CO, and the oxygen on an outlet side of the catalyst tower; and at least one of adding the oxygen to the argon gas when any one of the hydrogen and the CO is detected on the outlet side of the catalyst tower, and adding the hydrogen when the oxygen is detected, wherein the oxygen or the hydrogen to be added is intermittently added to the catalyst tower relative to continuous supply of the argon gas to the catalyst tower.