Coated Catalyst Composition for Controlled Hydrogen Peroxide Emulsion Gassing
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Solution Overview
Problem
Existing sensitization methods for hydrogen peroxide-based emulsion explosives face challenges such as inefficient energy use, environmental impact, health and safety risks, and instability, particularly due to the use of nitrate salts, and lack effective chemical gassing techniques for generating micron-sized gas bubbles.
Innovation Solution
A sensitizing composition comprising a liquid carrier, solid hydrogen peroxide catalyst, and a non-soluble coating agent is used to control the catalytic decomposition of hydrogen peroxide, forming controlled gas bubbles for detonation, preventing over-gassing and migration of catalyst particles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If chemical gassing techniques are used to generate gas bubbles in hydrogen peroxide emulsion, then sensitization effectiveness is improved, but control over bubble size and catalyst migration becomes difficult
Solution Approach 1:
A coating agent is introduced as an intermediary substance that coats the catalyst particles. This coating layer mediates between the catalyst and the hydrogen peroxide, controlling the decomposition reaction to produce uniform micron-sized bubbles while preventing catalyst aggregation and migration, thus achieving both effective sensitization and precise bubble size control
Solution Approach 2:
The physical and chemical parameters of the catalyst particles are modified by applying a coating layer. This changes the surface properties of the catalyst, controlling the rate and uniformity of hydrogen peroxide decomposition, which directly influences bubble size distribution and prevents catalyst migration during emulsion preparation
2Object-affected harmful factors
If delayed sensitization is implemented near the point of use, then safety is improved, but the complexity of the preparation process increases
Solution Approach 1:
The coating agent is applied to the catalyst particles in advance during manufacturing, creating a stable, non-sensitive composition that can be stored safely. The sensitization action is delayed until the coating layer is introduced near the point of use, allowing safe transportation and storage while enabling controlled sensitization when needed
Solution Approach 2:
The sensitization process is segmented into two distinct stages: (1) preparation of coated catalyst particles that are stable and safe to handle, and (2) introduction of the coating agent near the point of use to activate sensitization. This segmentation allows safe storage of components separately while enabling controlled sensitization only when required
3Reliability
If micron-sized gas bubbles are generated for sensitization, then detonation capability is improved, but the risk of over-gassing and emulsion instability increases
Solution Approach 1:
The coating layer on catalyst particles provides a controlled interface that regulates hydrogen peroxide decomposition. This creates a feedback mechanism where the coating layer moderates the reaction rate, ensuring uniform bubble nucleation and growth to the desired micron size while preventing excessive gas generation that would cause over-gassing and emulsion instability
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
Enables precise and controlled sensitization of hydrogen peroxide emulsions, allowing for delayed sensitization near the point of use, improving safety and reducing environmental impact while maintaining detonation capability.
Implementation Method 1
a solid hydrogen peroxide catalyst which is dispersed in the liquid carrier and a coating agent which is non-soluble in hydrogen peroxide and in water and which is arranged to coat a solid hydrogen peroxide catalyst dispersed in the liquid carrier
Implementation Method 2
the catalytic decomposition of hydrogen peroxide, forming controlled gas bubbles for detonation
Data Source
AI summary
A sensitizing composition for generating gas bubbles in an energetic hydrogen peroxide emulsion is disclosed. The sensitizing composition comprises a liquid carrier, a solid hydrogen peroxide catalyst which is dispersed in the liquid carrier and; a coating agent which is non-soluble in hydrogen peroxide and in water and which is arranged to coat the solid hydrogen peroxide catalyst dispersed in the liquid carrier. A method of preparing such a sensitizing composition is also disclosed.