Halocarbon Recycling via Supercritical Fluid Extraction
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Solution Overview
Problem
Current methods for capturing and recycling halocarbons, particularly volatile anaesthetic agents, are inefficient and result in environmental pollution, as they either require costly disposal of activated charcoal canisters or release harmful substances into the atmosphere, and existing systems are not viable for widespread medical use due to safety concerns and inefficiencies.
Innovation Solution
A method involving the use of supercritical fluids, such as carbon dioxide or nitrous oxide, to dissolve and separate halocarbons from capture materials like aerogels, allowing for continuous recycling and reuse of halocarbons without the need for steam purification and fractional distillation, while also stabilizing nitrous oxide through catalysts to prevent runaway reactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If activated charcoal canisters are used to capture halocarbons, then halocarbon capture is achieved, but costly disposal is required and environmental pollution occurs
Solution Approach 1:
The patent changes the physical-chemical parameters of the capture medium from activated charcoal to hydrophobic porous materials that enable selective adsorption of halocarbons while allowing water rejection. This parameter change in material properties enables continuous operation without frequent disposal, resolving the contradiction between capture effectiveness and disposal cost
Solution Approach 2:
The invention implements a recovery system where halocarbons adsorbed on the hydrophobic porous material are desorbed using heated inert gas, purified through condensation and fractionation, and returned to clinical use. This closed-loop recovery eliminates disposal costs and environmental pollution while maintaining continuous capture capability
2Manufacturing precision
If steam purification and fractional distillation are used to separate halocarbons, then purification is achieved, but process complexity and operational costs increase
Solution Approach 1:
The patent utilizes phase transitions of halocarbons from gaseous to liquid state through controlled condensation at specific temperatures. This natural phase change enables separation and purification without complex equipment, replacing steam purification and fractional distillation with a simpler condensation-based system that maintains high purity while reducing operational complexity
Solution Approach 2:
The invention replaces complex mechanical separation systems (steam purification and fractional distillation equipment) with a thermodynamic-based condensation system. By substituting mechanical complexity with controlled temperature and pressure changes, the system achieves equivalent or superior purification with simpler apparatus and lower operational costs
3Productivity
If nitrous oxide is used as supercritical fluid, then recycling efficiency is improved, but runaway reactions occur without catalysts
Solution Approach 1:
The patent introduces catalysts as intermediary substances that facilitate the decomposition of nitrous oxide at lower temperatures and pressures. These catalysts act as mediators between nitrous oxide and the halocarbon separation process, enabling the desired productivity improvements while maintaining reaction stability by preventing uncontrolled runaway reactions through controlled catalytic pathways
4Object-generated harmful factors
If conventional capture methods are used, then halocarbon removal is achieved, but environmental pollution and waste generation occur
Solution Approach 1:
The invention converts the harmful waste stream of discarded activated charcoal and released halocarbons into a beneficial closed-loop system. By using hydrophobic porous materials that can be regenerated and by recovering halocarbons through condensation, the system transforms what was previously harmful emissions and waste into reusable resources, eliminating both environmental pollution and substance loss
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 efficient, continuous recycling of halocarbons, reducing environmental impact by minimizing waste and operational costs, and allows for precise control of anaesthetic concentrations in medical settings, improving safety and efficacy.
Implementation Method 1
subjecting the material to a supercritical fluid, thereby forming a supercritical solution, the anaesthetic agent is dissolved in the supercritical fluid to form the supercritical solution which carries the anaesthetic agent from the material
Data Source
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AI summary
A method for capturing halocarbon from a gas, the method comprising processing gas containing halocarbon with material which is undamaged by exposure to supercritical fluid. A method for reclaiming halocarbon from a material, the method comprising exposing the material to a supercritical fluid.A module for processing a gas containing halocarbon, the module comprising material for capturing halocarbon from a gas, wherein the module is arranged to withstand supercritical fluid.