TEDA-Copper Sorbent for Nitrogen Oxide Removal
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Solution Overview
Problem
Current sorbents are ineffective and costly in removing nitrogen oxides from vehicle exhausts, particularly in enclosed areas like vehicle tunnels, where regulations demand efficient air purification to ensure safe air quality.
Innovation Solution
A sorbent composition with a surface deposition of 1 wt. % to 6 wt. % triethylenediamine and 3 wt. % to 15 wt. % of copper or zinc, or a combination thereof, is used, which is impregnated into materials like activated carbon, zeolites, or silica, and not treated with molybdenum or silver, to enhance nitrogen oxide removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional sorbents are used to remove nitrogen oxides, then the removal function is provided, but the effectiveness is low and the cost is high
Solution Approach 1:
The patent changes the chemical composition parameters of the sorbent by incorporating specific metal components (copper, zinc, manganese) in optimized weight percentages (1-15 wt%, 1-10 wt%, 1-5 wt% respectively) along with triethylenediamine (1-10 wt%). This parameter optimization resolves the contradiction by achieving higher nitrogen oxide removal effectiveness while controlling material costs through precise compositional control.
Solution Approach 2:
The patent creates a composite sorbent material combining activated carbon or zeolite support with multiple metal components (copper, zinc, manganese) and triethylenediamine. This composite structure resolves the technical contradiction by synergistically combining the adsorption capacity of the support material with the catalytic activity of metal-TEDA complexes, achieving high effectiveness at reasonable cost.
2Reliability
If triethylenediamine and metal components are added to enhance nitrogen oxide removal, then the removal effectiveness is improved, but the manufacturing complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-impregnating the support material (activated carbon or zeolite) with metal salts and triethylenediamine solutions before final drying and activation. This preliminary impregnation step simplifies manufacturing by establishing the active components in advance, reducing the need for complex post-processing while ensuring uniform distribution of copper, zinc, manganese, and TEDA for high removal effectiveness.
Solution Approach 2:
The patent merges multiple functional components (metal salts and triethylenediamine) into a single impregnation step, combining what could be separate complex treatments into one integrated manufacturing process. This merging approach maintains high nitrogen oxide removal effectiveness while reducing manufacturing complexity by consolidating the impregnation of multiple active ingredients simultaneously.
3Duration of action of moving object
If conventional sorbent compositions are used, then the manufacturing process is simple, but the breakthrough time is short
Solution Approach 1:
The patent extends breakthrough time by optimizing the concentration parameters of active components: copper (1-15 wt%), zinc (1-10 wt%), manganese (1-5 wt%), and triethylenediamine (1-10 wt%). These parameter changes enhance the capacity and durability of nitrogen oxide removal, achieving breakthrough times exceeding 40 minutes at 25 ppm NO, while maintaining manufacturing simplicity through straightforward impregnation and drying processes.
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 sorbent composition exhibits a significantly longer breakthrough time, effectively removing nitrogen oxides for extended periods, as demonstrated by breakthrough times exceeding 40 minutes at 25 ppm nitrogen monoxide, improving air quality in vehicle tunnels.
Implementation Method 1
Sorbents such as activated carbon have long been used to remove toxic gases and vapors from fluid streams
Implementation Method 2
activated carbons that are incorporated into a filter are useful for removing noxious agents from fluids... treated with various components that adsorb, catalyze, react, or otherwise interact with noxious gases
Data Source
AI summary
The present disclosure described compositions which may be effective in removing contaminants from a gas stream such as nitrous oxides. The composition may include a sorbent which contains triethylenediamine and a metal including copper, zinc, or a combination thereof. Methods of making such a composition are also described, along with devices which use the composition to remove contaminants from fluid streams, particularly in vehicle tunnels and parking garages.