Activated Carbon Pore Volume Distribution for Liquid Decolorization
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Solution Overview
Problem
Existing activated carbons do not achieve high decolorization performance, especially in liquid phases with high viscosity such as sugar liquids, due to inadequate pore volume distribution.
Innovation Solution
Developing activated carbon with specific pore volumes, including micropores and mesopores to macropores, by adjusting potassium and calcium element contents in the raw material and optimizing the activation process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If micropore volume is increased to enhance adsorption capacity, then gas component adsorption is improved, but decolorization performance deteriorates due to insufficient mesopore and macropore volume
Solution Approach 1:
The invention applies local quality by creating different pore volume characteristics in different size ranges within the same activated carbon material. Specifically, it maintains micropore volume at 0.58 mL/g or less while simultaneously ensuring mesopore volume (10-1000 nm) is 0.35 mL/g or more, allowing each pore size range to serve its optimal function: micropores for gas adsorption and mesopores/macropores for decolorization of larger molecules.
Solution Approach 2:
The invention utilizes porous materials by carefully controlling the pore volume distribution across different size ranges. It develops a hierarchical pore structure where mesopores and macropores are sufficiently developed (0.35 mL/g or more) to facilitate the adsorption of coloring substances and impurities in liquid phases, while micropore volume is controlled (0.58 mL/g or less) to prevent excessive gas adsorption that would compromise decolorization performance.
2Quantity of substance
If activated carbon is optimized for general adsorption, then gas component adsorption is improved, but performance in high viscosity liquid phases such as sugar liquid deteriorates
Solution Approach 1:
The invention applies local quality by creating different pore volume characteristics in different size ranges within the same activated carbon material. Specifically, it maintains micropore volume at 0.58 mL/g or less while simultaneously ensuring mesopore volume (10-1000 nm) is 0.35 mL/g or more, allowing each pore size range to serve its optimal function: micropores for gas adsorption and mesopores/macropores for decolorization of larger molecules.
Solution Approach 2:
The invention applies parameter changes by precisely controlling the pore volume parameters across different size ranges. It sets micropore volume to 0.58 mL/g or less and mesopore volume (10-1000 nm) to 0.35 mL/g or more, creating optimal conditions for both gas adsorption and liquid phase decolorization, including high viscosity liquids like sugar liquid where larger pores facilitate better mass transfer.
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 optimized activated carbon exhibits enhanced decolorization performance in both low and high viscosity liquid phases, with improved sugar liquid and soy sauce decolorization rates.
Implementation Method 1
Activated carbon has an excellent adsorption ability, and is widely used in a liquid phase treatment such as a removal of impurities from a liquid phase
Implementation Method 2
The micropore is a pore mainly involved in an adsorption of a substance having a small molecular weight such as a gas component
Data Source
AI summary
To provide activated carbon having a high decolorization performance in a liquid phase, and a method for producing the same. To provide activated carbon having a high decolorization performance in a liquid phase having a relatively high viscosity, such as a sugar liquid, and a method for producing the same. Activated carbon, wherein the activated carbon has a pore volume, which is calculated by measuring a nitrogen adsorption isotherm at 77 K and performing the MP method analysis, of 0.58 mL/g or less, and a pore volume at a pore diameter of 10 to 10000 nm measured by the mercury intrusion method of 0.35 mL/g or more.