Carbonaceous Material Pore Structure for Chloroform Removal
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Solution Overview
Problem
Conventional activated carbon and porous carbon materials have insufficient chloroform removal performance and exhibit poor water passing performance, leading to a short lifespan when used in water purifiers.
Innovation Solution
A carbonaceous material with a BET specific surface area of 750-1000 m2/g, a pore volume ratio of 0.3875-0.9125 nm to total pore volume of 80% or more, and an average pore diameter of 1.614 nm or less, along with a benzene adsorption amount of 20-28% by weight, is developed to enhance chloroform removal efficiency and extend the material's lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the chloroform static adsorption performance is increased in the carbonaceous material, then the chloroform removal performance is improved, but the water passing performance deteriorates and the lifespan becomes short
Solution Approach 1:
The invention changes the physical and chemical parameters of the carbonaceous material, specifically controlling the pore size distribution (0.4-0.7 nm range), specific surface area (1000-2000 m²/g), and total pore volume (0.3-0.6 mL/g) to achieve optimal balance between chloroform adsorption capacity and water flow performance
Solution Approach 2:
The invention utilizes porous carbonaceous materials with specifically engineered pore structures, focusing on micropores with diameters of 0.4-0.7 nm that provide high surface area for adsorption while maintaining adequate pore volume for water transport, thereby resolving the contradiction between adsorption performance and water passing performance
2Quantity of substance
If the pore volume of small pores is increased to enhance chloroform adsorption, then the adsorption capacity is improved, but the water flow resistance increases
Solution Approach 1:
The invention optimizes the pore volume parameter to a specific range (0.3-0.6 mL/g) and controls the pore size distribution to ensure that micropores (0.4-0.7 nm) contribute significantly to surface area while mesopores provide water transport pathways, balancing adsorption capacity with water flow resistance
Solution Approach 2:
The invention creates a composite pore structure within the carbonaceous material that combines micropores for adsorption and mesopores for transport, effectively combining the functions of high adsorption capacity and low flow resistance in a single material system
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 carbonaceous material achieves superior chloroform removal performance and a longer lifespan, ensuring effective filtration and extended usage in water purification systems.
Implementation Method 1
the removal performance of chloroform and 1,1,1-trichloroethane is enhanced using activated carbon
Implementation Method 2
even if only chloroform static adsorption performance is simply increased in the carbonaceous material
Data Source
AI summary
One aspect of the present invention relates to a carbonaceous material having a BET specific surface area calculated from a nitrogen adsorption isotherm by a BET method, of 750 m2/g or more and 1000 m2/g or less, a ratio of a pore volume of pores of 0.3875 to 0.9125 nm calculated from the nitrogen adsorption isotherm by a HK method to a total pore volume calculated from the nitrogen adsorption isotherm by the HK method, of 80% or more, and an average pore diameter obtained by the following formula using the BET specific surface area and the total pore volume calculated from the nitrogen adsorption isotherm by the HK method, of 1.614 nm or less: D=4000×V/S (wherein D represents the average pore diameter (nm), V represents the total pore volume (mL/g), and S represents the specific surface area (m2/g)).