Solid Chlorine Dioxide Carrier for Air Purification
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing solid carriers for chlorine dioxide in air purification have low adsorption capacity, short service period, and storage difficulties, limiting the effectiveness and stability of chlorine dioxide release.
Innovation Solution
A solid material comprising 50-60 wt.% inorganic porous materials, 10-20 wt.% nano titanium dioxide, 3-5 wt.% fluorescent materials, 20-30 wt.% sodium chlorite, 3-5 wt.% sodium lignosulfonate, and 1-10 wt.% polyethylene glycol and polyvinyl alcohol, which slowly releases chlorine dioxide gas when excited by visible light, stabilizing sodium chlorite and extending its service life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If solid carriers like silica gel, calcium silicate, or active carbon are used to load chlorine dioxide, then the chlorine dioxide can be released for disinfection, but the adsorption capacity is low and the service period is short
Solution Approach 1:
The patent uses a composite material system consisting of inorganic porous materials (such as activated alumina or activated zeolite) as the base carrier, combined with organic binding agents (starch, carboxymethyl cellulose, or polyacrylamide) to form a composite solid carrier. This composite structure provides both high adsorption capacity for chlorine dioxide and extended service period, resolving the contradiction between adsorption capacity and service duration.
Solution Approach 2:
The patent employs inorganic porous materials with specific pore structures (activated alumina or activated zeolite) as the core carrier. These porous materials provide large surface area and abundant pore sites for chlorine dioxide adsorption, significantly enhancing both adsorption capacity and the duration over which chlorine dioxide can be released, thereby addressing the limitation of short service period in conventional carriers.
2Quantity of substance
If aqueous solution of chlorine dioxide is used for disinfection, then high concentration disinfection is achieved, but transportation and storage are inconvenient and require configuration at use site
Solution Approach 1:
The patent extracts the water component from the aqueous chlorine dioxide solution, retaining only the active chlorine dioxide substance loaded onto the solid carrier. This extraction of the problematic solvent (water) enables the chlorine dioxide to be stored and transported in a stable solid form, eliminating the inconvenience of aqueous solution handling while maintaining high concentration disinfection capability.
Solution Approach 2:
The solid carrier acts as an intermediary substance that binds and stores chlorine dioxide in a stable form. Instead of directly handling aqueous chlorine dioxide solution, the carrier mediates between the chlorine dioxide active ingredient and the environment, enabling convenient storage and transportation while controlled release maintains high concentration disinfection effect when needed.
3Productivity
If gaseous chlorine dioxide is used to achieve wide diffusion range and strong effectiveness, then disinfection performance is improved, but control and stability are difficult to maintain
Solution Approach 1:
The patent creates a dynamic release system where chlorine dioxide is gradually released from the solid carrier over time. The release rate can be influenced by environmental factors such as humidity and temperature, providing both the diffusion capability of gaseous chlorine dioxide and a degree of controllability. This dynamic balance allows wide diffusion range while maintaining reasonable stability and control.
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 solid material effectively excites photocatalytic activity to slowly release chlorine dioxide, degrading harmful air substances like formaldehyde and providing long-term air disinfection, overcoming previous storage and stability issues.
Implementation Method 1
3-5 wt. % of fluorescent materials, where the above weight percentage is a proportion of a weight of each component to a total weight of the solid material
Implementation Method 2
The solid material can excite light with a specific wavelength of 400-580 nm through the fluorescent material under irradiation of visible light. The light of the specific wavelength can excite photocatalytic activity of the nano titanium dioxide
Implementation Method 3
50-60 wt. % of inorganic porous materials... The active alumina has a specific surface area of 200-350 m2/g measured according to a BET test method, a pore volume of 0.3-0.45 ml/g, and an average pore size of 2-50 nm
Data Source
AI summary
The invention provides a solid material for air purification and disinfection and a preparation method and application thereof. The solid material includes: 50-60 wt. % of inorganic porous materials, 10-20 wt. % of nano titanium dioxide, 3-5 wt. % of fluorescent materials, 20-30 wt. % of sodium chlorite, 3-5 wt. % of sodium lignosulfonate, 1-10 wt. % of polyethylene glycol, and 1-10 wt. % of polyvinyl alcohol. The method for preparing the solid material includes: formulating the fluorescent material into a slurry by using a polyethylene glycol aqueous solution; uniformly mixing the nano titanium dioxide, the sodium lignosulfonate, and the fluorescent material formulated into the slurry, and then spraying the mixture on an inorganic porous material carrier to be uniformly adsorbed; and mixing the sodium chlorite with the above mixture for granulation to obtain the product. The solid material for air purification of the invention can be stored stably for a long time, and chlorine dioxide gas slowly released can degrade harmful substances in the air such as formaldehyde and kill bacteria in the air.