Gradient Adsorbent Bed Zoning for High-Purity Gas Separation
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Solution Overview
Problem
Conventional adsorption-based gas separation systems face inefficiencies in separation efficiency and recovery at larger scales, particularly in the renewable energy sector, due to inadequate consideration of adsorption kinetics and vessel configurations.
Innovation Solution
The system modulates concentration gradients in adsorbent beds to create distinct zones for enhanced component recovery and purity, utilizing vertically oriented beds and controlled gas flow to form enrichment, transition, recycle, and by-product zones, with selective recycling and partial vacuum techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If standard vessel sizes with small inlet and outlet orifices are used, then system plumbing is simplified, but separation efficiency decreases
Solution Approach 1:
The adsorption bed is divided into multiple segments with different orifice sizes. The first adsorption bed has a first set of orifices and the second adsorption bed has a second set of orifices, allowing different flow characteristics in different zones to simultaneously simplify plumbing and improve separation efficiency
Solution Approach 2:
Different regions of the adsorption system have different orifice configurations tailored to local requirements. The first adsorption bed uses first orifices optimized for its function while the second adsorption bed uses second orifices optimized for its function, improving overall separation efficiency without complicating the entire system
2Ease of operation
If standard vessel sizes are employed, then system deployment is easier, but recovery at higher purity in fewer stages decreases
Solution Approach 1:
The system dynamically switches between different operational modes (adsorption and desorption) and uses variable flow rates through different orifice configurations to achieve high purity recovery in fewer stages while maintaining ease of deployment
Solution Approach 2:
The system changes operational parameters including flow rates, pressure differentials, and temperature to optimize recovery efficiency. The different orifice sizes allow for parameter adjustments that improve recovery without complicating deployment
3Device complexity
If adsorption kinetics are not considered in vessel configuration, then system design is simpler, but separation performance at larger scales decreases
Solution Approach 1:
The system design incorporates preliminary consideration of adsorption kinetics by configuring different orifice sizes in different beds to match the kinetic characteristics of the adsorbent-material interactions, improving separation performance without significantly complicating design
Solution Approach 2:
The system uses multiple adsorption beds with replicated structures but different orifice configurations to model and optimize kinetic behavior, achieving improved performance while maintaining design simplicity through modular replication
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 significantly increases the recovery and purity of target components, achieving high concentrations of up to 99.9% in the product gas, while reducing the transition zone volume and optimizing gas distribution within the adsorbent beds.
Implementation Method 1
nonuniform adsorption of a gas component in a quantity of adsorbent
Implementation Method 2
exposing the isolated segment to a partial vacuum to obtain a gas product
Implementation Method 3
the resulting intermediate gas can be provided as an input with time-varying concentration of the components into a second bed of adsorbent
Data Source
AI summary
The present disclosure relates to separation methods, apparatuses, and systems for obtaining a gas product from a gas mixture. A component of a gas mixture may be nonuniformly adsorbing on a quantity of adsorbent and a portion of the quantity of adsorbent isolated and exposed to a partial vacuum to obtain the gas product.