Halocarbon Capture Sleeve for Supercritical Fluid Extraction
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Solution Overview
Problem
Current methods for capturing and re-manufacturing halocarbon volatile anaesthetic agents are inefficient, leading to high environmental and financial costs due to the use of expensive pressure-tolerant canisters and the release of ozone-depleting chlorofluorocarbons, which also contribute to greenhouse gas emissions.
Innovation Solution
A system using a pressure-intolerant sleeve containing filter material for capturing halocarbons, which is then transferred to a pressure-tolerant housing for supercritical fluid extraction, along with a method for recycling carbon dioxide and using supercritical carbon dioxide for chromatography and fractional distillation to separate and purify the agents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pressure-tolerant canisters are used for capturing and storing halocarbon anaesthetic agents, then the reliability and safety of the capture system is improved, but the manufacturing cost and device complexity increase significantly
Solution Approach 1:
The system is divided into two distinct components: a pressure-intolerant capture canister for collecting anaesthetic agents at atmospheric pressure, and a separate pressure-tolerant extraction vessel for supercritical fluid extraction. This segmentation allows the capture canister to be manufactured cheaply without pressure requirements, while the expensive pressure-tolerant components are only used where absolutely necessary for the extraction process.
Solution Approach 2:
The pressure-tolerant functionality is extracted from the capture canister and placed into a separate extraction vessel. The capture canister is designed to be pressure-intolerant and is emptied into the pressure-tolerant extraction vessel, which then performs the supercritical fluid extraction. This separation eliminates the need for the capture canister to withstand high pressures.
2Productivity
If supercritical fluid extraction is used to recover halocarbon agents, then the purification efficiency and recovery rate are improved, but the energy consumption and process complexity increase
Solution Approach 1:
The system utilizes changes in pressure and temperature parameters to achieve supercritical fluid extraction. By controlling these parameters, the supercritical fluid (typically CO2) can selectively dissolve and extract halocarbon agents from the capture canister, achieving high purification efficiency while allowing for energy recovery during the depressurization phase.
Solution Approach 2:
The process exploits phase transitions of the supercritical fluid between supercritical, liquid, and gaseous states. During extraction, the fluid is maintained in a supercritical state for optimal solubility. During separation and recovery, pressure and temperature changes induce phase transitions that facilitate product recovery and fluid recycling, reducing overall energy consumption.
3Ease of manufacture
If halocarbon anaesthetic agents are released into the environment, then the financial cost of disposal is reduced, but severe environmental harm including ozone depletion and greenhouse gas emissions occurs
Solution Approach 1:
The system converts what would be harmful waste emissions into valuable recoverable products. By capturing and recovering halocarbon anaesthetic agents through supercritical fluid extraction, the system prevents environmental harm while simultaneously creating a beneficial outcome through agent recovery and potential reuse, thereby eliminating both disposal costs and environmental damage.
Solution Approach 2:
Instead of discarding used anaesthetic agents into the environment, the system implements a recovery process where agents are captured from waste streams, purified through supercritical fluid extraction, and made available for reuse. This transforms a waste disposal problem into a resource recovery opportunity.
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 reduces the cost of canister manufacturing, conserves CO2, and effectively recovers halocarbon anaesthetic agents, minimizing environmental impact by reducing ozone depletion and greenhouse gas emissions.
Implementation Method 1
A system using a pressure-intolerant sleeve containing filter material for capturing halocarbons, which is then transferred to a pressure-tolerant housing for supercritical fluid extraction
Implementation Method 2
recycling carbon dioxide and using supercritical carbon dioxide for chromatography and fractional distillation
Implementation Method 3
using supercritical carbon dioxide for chromatography and fractional distillation to separate and purify the agents
Data Source
AI summary
An anaesthetic halocarbon capture system is provided. The system includes a pressure-intolerant sleeve containing filter material for capturing one or more types of anaesthetic halocarbon prior to supercritical fluid extraction, and a pressure-tolerant housing into which the sleeve can be inserted so as to permit exposure of the sleeve contents to pressures required for supercritical fluid extraction.