Hydrogen Sulfide Mixture Moisture Control for Corrosion Prevention
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Solution Overview
Problem
Hydrogen sulfide gas filled in containers often experiences moisture concentration issues, leading to corrosion of metal piping and potential safety hazards due to high moisture levels, which existing dehumidification methods struggle to control effectively.
Innovation Solution
A hydrogen sulfide mixture with controlled moisture concentrations (0.001-75 mol ppm in the gaseous phase and 0.01-15 mol ppm in the liquid phase) is filled into containers, using a dehydration process with moisture adsorbents and specific container volume ratios to maintain low moisture levels, preventing corrosion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If high purity hydrogen sulfide is filled into a filling container, then the initial moisture concentration is sufficiently low, but the moisture is concentrated within the filling container during emission, leading to high moisture concentration in the emitted gas
Solution Approach 1:
The patent extracts the moisture from the hydrogen sulfide system by introducing a desiccant substance (calcium sulfate anhydride) that selectively absorbs and removes water molecules from the gas phase, maintaining low moisture concentration throughout the emission process rather than allowing moisture concentration to increase over time
Solution Approach 2:
The patent introduces calcium sulfate anhydride as an intermediary substance that mediates between the hydrogen sulfide and moisture, acting as a buffer that prevents moisture concentration from rising during emission by continuously absorbing water vapor in the gas phase
2Ease of manufacture
If dehumidification agents such as synthetic zeolite are used, then moisture removal is achieved, but the moisture concentration required for corrosion control is unknown and corrosion cannot be effectively controlled
Solution Approach 1:
The patent changes the chemical parameter of the desiccant from synthetic zeolite to calcium sulfate anhydride, which has different adsorption characteristics that enable it to maintain moisture concentration within a specific range (5-50 ppm) that prevents corrosion while remaining compatible with stainless steel piping
Solution Approach 2:
The patent creates a composite system combining hydrogen sulfide with calcium sulfate anhydride particles suspended in the gas phase, forming a functional composite that simultaneously achieves dehumidification and corrosion prevention through the specific chemical properties of calcium sulfate
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 controlled moisture concentrations significantly reduce metal corrosion, allowing the use of stainless steel without expensive corrosion-resistant alloys and ensuring safe handling and emission of hydrogen sulfide gas.
Implementation Method 1
When the hydrogen sulfide gas is emitted from the filling container, liquefied hydrogen sulfide of a liquid phase evaporates to maintain the vapor-liquid equilibrium within the filling container
Implementation Method 2
a removal method by dehumidification agents, such as synthetic zeolite, for example, as a method for removing the moisture in the hydrogen sulfide
Data Source
AI summary
To provide a hydrogen sulfide mixture hardly corroding metals. The hydrogen sulfide mixture contains hydrogen sulfide and water. The hydrogen sulfide mixture is filled into a filling container so that at least one part of the hydrogen sulfide mixture is liquid and the moisture concentration of a gaseous phase is 0.001 mol ppm or more and less than 75 mol ppm.