Moving Solid Sorbent for Hydrogen Isotope Separation
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Solution Overview
Problem
Existing methods for separating hydrogen isotopes, such as cryogenic distillation and chromatographic processes, face challenges in scalability, cost, and complexity, particularly in achieving high throughputs and purities, and often require large inventories of hydrogen and expensive equipment.
Innovation Solution
A method and device utilizing a moving solid sorbent, alternately contacted with a gas stream at different temperatures to selectively absorb and desorb hydrogen isotopes, allowing for continuous operation and efficient separation of hydrogen isotopes from inert gases like helium, using sorbents like palladium, vanadium, or titanium to differentiate isotope absorption and desorption based on temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If cryogenic distillation is used to separate hydrogen isotopes, then separation purity can be achieved, but the equipment complexity and hydrogen inventory requirements increase significantly
Solution Approach 1:
The invention changes the operating parameters from cryogenic temperatures to ambient or elevated temperatures by using chemical reaction (hydrogenation) and thermal decomposition. This parameter change eliminates the need for complex cryogenic cooling systems while achieving the same separation effect through selective chemical absorption at different temperatures
Solution Approach 2:
The invention replaces the mechanical cryogenic distillation system with a chemical process system involving hydrogenation reactions and thermal decomposition. This substitution eliminates complex mechanical cooling equipment and large hydrogen inventories required for cryogenic operation
2Manufacturing precision
If permeator processes with membranes are used, then separation can be achieved, but the system becomes complex and sensitive to contamination
Solution Approach 1:
The invention uses a solid sorbent material that can be regenerated through thermal decomposition, replacing expensive and sensitive membrane materials. The sorbent can be cyclically used and regenerated, making the system more robust and less sensitive to contamination while reducing overall system complexity
3Manufacturing precision
If chromatographic methods are used for isotope separation, then separation can be achieved, but scalability to high throughputs is limited
Solution Approach 1:
The invention employs periodic thermal cycling of the sorbent bed, alternating between hydrogenation (absorption) and decomposition (desorption) phases. This periodic action enables continuous operation with high throughput while maintaining separation purity, overcoming the scalability limitations of traditional chromatographic methods
Solution Approach 2:
The invention achieves continuous operation by implementing a cyclic process where fresh gas is continuously fed during the absorption phase and enriched gas is continuously produced during the decomposition phase. This continuous useful action enables high throughput while maintaining separation effectiveness
4Manufacturing precision
If thermal cycling absorption process is used, then separation efficiency improves, but equipment complexity and operational complexity increase
Solution Approach 1:
The invention divides the thermal cycling process into distinct spatial zones within the sorbent bed: a cold zone for absorption and a hot zone for decomposition. This segmentation allows simultaneous occurrence of different process stages, improving separation efficiency while simplifying operational control through natural thermal gradients
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 enables continuous, efficient, and scalable separation of hydrogen isotopes with reduced hydrogen inventory, achieving high purities and throughputs while minimizing equipment costs and complexity, suitable for applications in fusion systems and nuclear installations.
Implementation Method 1
at least one first temperature, at which absorption of the gaseous components of the gas stream onto the sorbent occurs
Implementation Method 2
at least two second temperatures, different from the first temperature and from each other, at each of which desorption of one of the hydrogen isotopes from the gaseous components of the gas stream onto the sorbent occurs
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The invention relates to a method and a device (110) for enriching or depleting at least one hydrogen isotope in a gas stream. The method comprises the steps of: a) providing a gas stream which has as gaseous components at least two different hydrogen isotopes or at least one of the hydrogen isotopes and an inert gas; b) providing a moving solid which comprises at least one sorbent, wherein the sorbent is selected such that the gaseous components of the gas stream differ from one another in a degree of absorption by the sorbent;and c) Alternating contact of the moving solid and the gas stream i) at at least one first temperature, at which the absorption of the gaseous components of the gas stream onto the sorbent takes place, and ii) at at least two second temperatures, different from the first temperature and from each other, at which desorption of one of the hydrogen isotopes from the gaseous components of the gas stream onto the sorbent takes place; until a desired degree of enrichment or depletion of at least one of the hydrogen isotopes is achieved.;