Liquid Nitrous Oxide Storage With Inert Gas Explosion Suppression
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for handling liquid nitrous oxide lack explosion-proof safety measures, particularly in industrial-scale storage and handling, despite recommendations to keep temperatures below 40°C and use safety valves, as nitrous oxide remains sensitive to explosion even at temperatures below this threshold.
Innovation Solution
A process for storing nitrous oxide in the liquid phase with an inert component (nitrogen, oxygen, carbon dioxide, water, argon, helium, krypton, xenon, or mixtures thereof) at a temperature of 190 to 273 K, maintaining a specific concentration range (2 to 20 wt.% inert components and 0 to 2 wt.% flammable compounds) within containers with a minimum inner distance of 10 cm between interior walls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If nitrous oxide is stored as compressed gas in small containers, then portability and ease of handling are improved, but storage density and volume efficiency deteriorate
Solution Approach 1:
The patent applies phase transition by storing nitrous oxide in liquid form rather than gaseous form. This allows significantly higher storage density in the same container volume while maintaining portability. The liquid phase is achieved through cooling to temperatures below the critical temperature of nitrous oxide (309.6 K), enabling compact storage of technically relevant amounts.
Solution Approach 2:
The patent changes the temperature parameter to below 309.6 K (critical temperature) to enable liquid phase storage. This parameter change fundamentally alters the physical state and storage characteristics of nitrous oxide, achieving both high density and ease of handling in portable containers.
2Reliability
If nitrous oxide is stored at temperatures below 40°C with safety valves, then operational safety is improved, but explosion sensitivity remains at low temperatures
Solution Approach 1:
The patent introduces an inert atmosphere by mixing nitrous oxide with inert gases such as nitrogen, carbon dioxide, or argon. This inert environment suppresses the explosive decomposition of nitrous oxide even at low temperatures, eliminating the harmful explosion sensitivity while maintaining operational safety. The inert gas acts as a buffer that prevents catalytic decomposition pathways.
Solution Approach 2:
The inert gas serves as an intermediary substance that mediates between nitrous oxide and potential ignition sources or catalytic surfaces. It physically separates and protects the nitrous oxide from conditions that would trigger explosive decomposition, enabling safe storage at low temperatures without compromising stability.
3Quantity of substance
If nitrous oxide is stored in liquid form at low temperatures, then storage density is improved and pressure requirements are reduced, but explosion sensitivity increases
Solution Approach 1:
The patent applies inert atmosphere by incorporating inert gases into the liquid nitrous oxide storage system. This creates an inert environment that suppresses explosive decomposition while maintaining the high storage density benefits of liquid form. The inert gas concentration is sufficient to prevent catalytic decomposition even at low temperatures where liquid storage is most efficient.
Solution Approach 2:
The patent creates a composite fluid system combining nitrous oxide with inert gases. This composite mixture maintains the desirable properties of liquid nitrous oxide (high density, low pressure) while the inert gas component provides explosion protection. The composite nature of the stored medium resolves the contradiction between density and safety.
4Manufacturing precision
If pure nitrous oxide is stored, then chemical purity is improved for specific applications, but explosion risk increases due to lack of inert components
Solution Approach 1:
The patent applies inert atmosphere by deliberately adding inert gases to nitrous oxide storage systems. This creates an explosion-protected environment while maintaining sufficient chemical purity for most applications. The inert gas concentration is optimized to provide safety without significantly compromising the effectiveness of nitrous oxide for its intended uses.
Solution Approach 2:
The patent changes the compositional parameters by introducing controlled amounts of inert gases (typically 5-50% by volume). This parameter change transforms the system from high-risk pure nitrous oxide to a safe composite mixture, while the nitrous oxide concentration remains sufficient for most industrial and medical applications.
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
Ensures explosion-proof storage of nitrous oxide by minimizing the risk of sudden explosions, allowing for safe handling and storage of technically relevant amounts, even at low temperatures, while maintaining high density and reducing pressure requirements.
Implementation Method 1
nitrous oxide can be stored explosion-proof in the liquid phase in a container if it additionally contains an inert component
Implementation Method 2
nitrous oxide is present in liquid form with a typical purity in the range of 99%
Implementation Method 3
keeping it at a temperature of 190 to 273 K
Data Source
AI summary
A process for the explosion-proof storage of nitrous oxide in the liquid phase in a container comprising filling the container with nitrous oxide and an inert component selected from nitrogen, oxygen, carbon dioxide, water, argon, helium, krypton, xenon and mixtures thereof, and keeping it at a temperature of 190 to 273 K, wherein (i) the container has in all three spatial directions an inner distance between two opposite interior walls of ≥10 cm, (ii) the concentration of the inert components comprises 2 to 20 wt.-% in total, based on the nitrous oxide in the liquid phase, and (iii) compounds selected from—gases having a flammable range with air at 293.15 K and 101.3 kPa abs,—liquids having a flash point of ≤366.15 K at 101.3 kPa abs, and—mixtures thereof are kept at 0 to 2 wt.-% in total, based on the nitrous oxide in the liquid phase.