Activated Carbon Filter for Ozone Exhaust Gas Purification
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Solution Overview
Problem
Conventional ozone decomposition filters struggle to effectively remove volatile organic compounds from ozone-containing exhaust gases emitted by printers, especially when the amounts are small, due to limitations in pore diameter and specific surface area of activated carbon.
Innovation Solution
A composition and filter utilizing activated carbon powder with a high percentage of pores in the range of 0.4-0.8 nm, combined with an ozone decomposition catalyst, to efficiently adsorb and remove ozone and volatile organic compounds from ozone-containing exhaust gases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional activated carbon is used in ozone decomposition filters, then the filter can remove volatile organic compounds, but the removal efficiency is insufficient when volatile organic compound amounts are small (0.01-100 mg/m3)
Solution Approach 1:
The invention changes the pore diameter parameter of activated carbon from conventional ranges to specifically 0.4-0.8 nm, and optimizes the pore volume ratio to 70-90%. This parameter optimization enables high-efficiency adsorption of volatile organic compounds at low concentrations (0.01-100 mg/m3) while maintaining ozone decomposition performance, directly resolving the contradiction between reliable removal efficiency and low substance quantity
2Quantity of substance
If activated carbon with larger pore diameter is used, then adsorption capacity increases, but adsorption performance for small amounts of volatile organic compounds in ozone-containing exhaust gas decreases
Solution Approach 1:
The invention applies local quality by creating a specific pore size distribution where 70-90% of pores fall within the 0.4-0.8 nm diameter range. This localized pore size optimization provides optimal adsorption sites for trace volatile organic compounds in ozone-containing exhaust gas, achieving high reliability for low-concentration adsorption while maintaining adequate total adsorption capacity
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 solution significantly reduces ozone and volatile organic compound content in exhaust gases, meeting stringent emission regulations by optimizing adsorption performance through specific pore diameter distribution in the activated carbon.
Implementation Method 1
activated carbon can adsorb volatile organic compounds in general, the activated carbon can be used for adsorbing and removing volatile organic compounds from the gas containing the volatile organic compounds
Implementation Method 2
an ozone decomposition filter with an ozone decomposition catalyst such as manganese oxide carried thereon has conventionally been used in printing machines
Data Source
AI summary
A composition for purifying an ozone-containing gas comprising activated carbon, in which the percentage of the volume of pores having a pore diameter of 0.4-0.8 nm in the volume of pores having a pore diameter of 0.4-2.0 nm is 75% or more, and an ozone decomposition catalyst powder is disclosed. Also disclosed is a filter for purifying an ozone-containing exhaust gas comprising activated carbon powder, in which the percentage of the volume of pores having a pore diameter of 0.4-0.8 nm in the volume of pores having a pore diameter of 0.4-2.0 nm is 75% or more, and an ozone decomposition catalyst powder carried on a fiber supporting body. The composition and filter of the present invention can remarkably reduce the content of ozone and volatile organic compounds in ozone-containing exhaust gas from printers.