Formed Canister Adsorbent Balancing Butane Uptake and Strength
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Solution Overview
Problem
Activated carbon fiber has not been sufficiently developed for use as an adsorbing material in canisters, particularly in multi-chamber canisters, and there is a need for improved mechanical strength and adsorption performance.
Innovation Solution
A formed adsorber is created by mixing activated carbon fiber with a fibrous binder, with a specific ratio of binder to carbon, achieving high adsorption performance under varying pressures and improved mechanical strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If activated carbon fiber is used as an adsorbing material in canisters, then adsorption speed and micropore characteristics are improved, but mechanical strength and filling density are insufficient
Solution Approach 1:
The patent combines activated carbon fiber with granular activated carbon to create a composite adsorbing material. This composite structure leverages the high adsorption speed and micropore characteristics of activated carbon fiber while incorporating the mechanical strength and density of granular activated carbon, thereby resolving the contradiction between adsorption performance and mechanical strength.
2Speed
If activated carbon fiber is used as an adsorbing material, then adsorption-desorption speed is improved, but filling density is reduced
Solution Approach 1:
The patent applies local quality by creating a composite material where different regions or components serve different functions. The activated carbon fiber provides high-speed adsorption zones, while the granular activated carbon contributes to overall density and structural integrity, allowing the material to exhibit both high adsorption speed and high filling density simultaneously.
3Reliability
If more canisters have adsorbing material in multiple chambers, then adsorption performance is improved, but device complexity increases
Solution Approach 1:
The composite adsorbing material developed in the patent is designed to be universally applicable across different canister configurations. The material itself embodies multiple functional characteristics (high adsorption speed, high density, mechanical strength) that can satisfy the requirements of various chamber arrangements, thereby reducing the need for complex multi-chamber structures while maintaining high adsorption performance.
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 formed adsorber exhibits excellent adsorption-desorption performance and mechanical strength, suitable for high-performance canisters, with optimized properties for both main and auxiliary chambers.
Implementation Method 1
X represents an amount of n-butane gas adsorbed (unit: parts by weight) per 100 parts by weight of the formed adsorber at 25°C under an atmosphere where a gas pressure of n-butane gas is 0.2 kPa
Data Source
Figure 1~3
AI summary
An object is to provide a new form of formed adsorbers suitable for high performance canisters. A formed adsorber for a canister is to satisfy the following conditions. The formed adsorber satisfies a condition where P0.2/100 expressed by Equation 1: P0.2/100=X÷Y×100 is 120% or less. In Equation 1 above, X represents an amount of n-butane gas adsorbed per 100 parts by weight of the adsorbing material at 25°C under an atmosphere where a gas pressure of n-butane gas is 0.2 kPa, and Y represents an amount of n-butane gas adsorbed per 100 parts by weight of the adsorbing material at 25°C under an atmosphere where a gas pressure of n-butane gas is 100 kPa.