Diborane Gas Storage Using Hydroxylated Oxides Without Refrigeration
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Solution Overview
Problem
Source gases like diborane are highly unstable at room temperature and decompose quickly when stored in a pure form, posing challenges in storage and delivery for industrial processes, and refrigeration is necessary to slow down decomposition, adding complexity and cost.
Innovation Solution
Using hydroxylated metal oxides or silica as adsorption media to reversibly adsorb and desorb source gases like diborane, eliminating the need for refrigeration by maintaining stability through hydrogen-bonding interactions, allowing storage and delivery without significant decomposition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If source gases are stored in a pressurized vessel in pure form, then the concentration is high (approaching 100%), but the decomposition rate is very fast (within days or weeks)
Solution Approach 1:
The patent introduces an inert gas (mediator) between the source gas molecules to prevent direct interaction and decomposition. The inert gas acts as a physical barrier that reduces the frequency of reactive collisions between source gas molecules, thereby slowing decomposition while maintaining high concentration in a pressurized vessel.
Solution Approach 2:
The patent creates an inert atmosphere by mixing the source gas with an inert gas such as nitrogen or argon. This inert environment prevents the source gas from undergoing decomposition reactions by eliminating reactive interactions with other molecules, allowing stable storage at high concentrations without refrigeration.
2Reliability
If source gases are diluted with inert gas to reduce decomposition rate, then the stability improves, but the concentration decreases (to 1-2%)
Solution Approach 1:
The patent changes the pressure parameter to compensate for the dilution effect. By storing the diluted gas mixture in a pressurized vessel, the partial pressure of the source gas is maintained at levels sufficient for process requirements, effectively delivering high concentration equivalent without the decomposition issues of pure high-concentration storage.
3Reliability
If the temperature is reduced to improve stability, then the decomposition rate decreases, but the system complexity and cost increase due to refrigeration requirements
Solution Approach 1:
The patent replaces the mechanical refrigeration system with a chemical solution (inert gas mixing). Instead of using complex temperature control equipment to achieve stability, the inert gas mixture provides chemical stabilization at ambient temperature, eliminating the need for refrigeration infrastructure while maintaining source gas stability.
4Productivity
If source gases are stored in a pressurized vessel, then the delivery efficiency is high, but the decomposition occurs quickly reducing the useful storage time
Solution Approach 1:
The inert gas acts as a mediator that allows high-pressure storage without rapid decomposition. The pressurized vessel maintains delivery efficiency through high pressure, while the inert gas intermediary prevents the decomposition that would otherwise occur, extending the useful storage time from days/weeks to much longer periods.
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 method enables stable storage and delivery of source gases for up to two years with minimal decomposition, maintaining purity and reducing operational complexity and costs by avoiding refrigeration requirements.
Implementation Method 1
Using hydroxylated metal oxides or silica as adsorption media to reversibly adsorb and desorb source gases like diborane
Implementation Method 2
maintaining stability through hydrogen-bonding interactions
Data Source
AI summary
Described are gas storage medium and methods of storing source gases in the gas storage medium, particularly relating to using hydroxylated metal oxides or hydroxylated metalloid oxides as a storage medium for storing diborane.