Activated Carbon Pore Structure for High-Viscosity Decolorization
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Solution Overview
Problem
Existing activated carbon technologies do not achieve high decolorization performance, especially in liquid phases with high viscosity, such as sugar liquids, due to inadequate pore volume distribution and hardness, leading to inefficient adsorption and packing issues.
Innovation Solution
The activated carbon is produced with specific pore volumes at 10 to 10000 nm and 300 to 1000 nm, adjusted by controlling potassium and calcium element contents, ensuring a balance between adsorption performance and hardness through a four-step production process involving potassium reduction, calcium contact, activation, and acid-washing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pore volume at 10 to 10000 nm is increased to improve decolorization performance, then the adsorption ability is improved, but the packing density decreases and hardness deteriorates
Solution Approach 1:
The patent applies parameter changes by precisely controlling the pore volume at 10 to 10000 nm within the range of 0.8 to 1.9 mL/g and the pore volume at 300 to 1000 nm at 0.19 mL/g or more. This optimization balances the adsorption performance needed for decolorization with the structural integrity required for hardness, resolving the contradiction between improved decolorization performance and maintained hardness.
2Reliability
If the pore volume at 10 to 10000 nm is increased to improve adsorption performance, then the movement path for substances is improved, but the packing density in adsorption columns decreases
Solution Approach 1:
The patent optimizes the pore volume parameter at 10 to 10000 nm to fall within 0.8 to 1.9 mL/g, which provides sufficient movement paths for substance transport while maintaining adequate packing density for effective use in adsorption columns and towers. This parameter optimization resolves the contradiction between improved adsorption performance and maintained packing density.
3Reliability
If the pore volume at 300 to 1000 nm is increased to improve decolorization performance, then the adsorption sites are increased, but the structural integrity may be compromised
Solution Approach 1:
The patent specifies that the pore volume at 300 to 1000 nm should be 0.19 mL/g or more, which provides sufficient adsorption sites for improved decolorization performance while maintaining the structural integrity of the activated carbon particles. This controlled parameter change resolves the contradiction between increased adsorption sites and preserved structural stability.
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 activated carbon exhibits high decolorization performance in both high and low viscosity liquid phases, with improved sugar liquid and soy sauce decolorization, and high hardness for efficient use in adsorption columns, maintaining balance between adsorption and structural integrity.
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 pore at a pore diameter of 10 to 10000 nm serves not only as an adsorbed site, but also as a moving path of a substance to a smaller pore
Data Source
AI summary
To provide activated carbon having a high decolorization performance in a liquid phase, especially even 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 at a pore diameter of 10 to 10000 nm measured by the mercury intrusion method of 0.8 to 1.9 mL/g, and a pore volume at a pore diameter of 300 to 1000 nm measured by the mercury intrusion method of 0.19 mL/g or more.