EFARH Vortex Tube CO2 Separation
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Solution Overview
Problem
Current CO2 separation and capture technologies are energy intensive and have limitations, such as the use of chemical adsorbents with limited lifetimes, making them inefficient for large-scale applications.
Innovation Solution
A modified Ranque-Hilsch vortex tube is designed to enhance the separation of gaseous components by introducing an internal electric field using a conductive wire along the tube axis, which improves the separation efficiency of CO2 from gas mixtures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If chemical adsorbents are used for CO2 separation, then separation can be achieved, but energy consumption is high and adsorbent lifetime is limited
Solution Approach 1:
The patent replaces chemical adsorption systems with a mechanical vortex tube system that uses rotational kinetic energy and centrifugal forces to separate CO2 from gas mixtures, eliminating the need for chemical adsorbents and their associated regeneration energy requirements
Solution Approach 2:
The invention changes the separation mechanism from chemical parameter-based adsorption to physical parameter-based centrifugal separation, where CO2 separation efficiency is controlled by rotational speed, pressure, and vortex tube geometry rather than chemical affinity
2Reliability
If conventional vortex tubes are used for gas separation, then temperature separation is achieved, but CO2 separation efficiency is low (less than 1%)
Solution Approach 1:
The vortex tube is divided into distinct functional zones including a tangential injection section, a vortex generation section with specific length-to-diameter ratio, and separate cold and hot exit sections, with the cold exit specifically optimized for CO2 enrichment
Solution Approach 2:
The patent optimizes specific parameters including inlet pressure (4-40 bar), tangential injection angle, vortex tube length-to-diameter ratio (L/D), and cold exit area ratio to maximize CO2 separation efficiency while maintaining practical throughput
3Temperature
If vortex tube length is increased to improve temperature separation, then temperature separation improves, but CO2 separation efficiency decreases
Solution Approach 1:
The patent identifies and optimizes the vortex tube length-to-diameter ratio as a critical parameter, finding that shorter tubes with specific L/D ratios provide optimal CO2 separation by maintaining strong centrifugal forces throughout the tube length without excessive temperature gradients that would reduce separation efficiency
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 modified vortex tube achieves higher CO2 separation efficiencies, with the ability to concentrate CO2 and further separate it in a series of tubes, ultimately leading to more efficient gas processing and potential conversion of CO2 into other chemical compounds.
Implementation Method 1
introducing an internal electric field using a conductive wire along the tube axis
Implementation Method 2
A Ranque-Hilsch vortex tube is a device with no moving parts capable of dividing high-pressure gaseous input flow, created by tangential injection of a compressed gas using one or more nozzles, into two low-pressure flows of different temperatures
Implementation Method 3
a strong vortex-like flow field is established, giving rise to a non-uniform temperature, or density, distribution within the tube
Data Source
AI summary
An improved apparatus for the separation of gas or gas-vapor, as well as simultaneous product transformation or conversion of one or more of the separated gas or gas-vapor species, includes modification of a Ranque-Hilsch vortex tube to include an electric field internal to the vortex tube, created either by an applied potential or induced by temperature-dependent triboelectric effects, or a combination of both. The electric field is used to enhance separation of gaseous components, with particular emphasis on separation of CO2 from a gaseous mixture, and to promote subsequent conversion of the resulting separated gaseous product or products.