Activated Carbon Filter with Zirconium for Nitrate Adsorption
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Solution Overview
Problem
Existing activated carbon filters struggle to effectively filter nitrates, leading to insufficient adsorption efficiency.
Innovation Solution
A filter unit comprising activated carbon granules coated with a thermoplastic binder and a zirconium compound, where the zirconium compound is bound to the binder during heating, creating a shaped adsorption body with enhanced micropores for improved adsorption efficiency, particularly in filtering nitrates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional activated carbon is used in filter units, then the filter structure is simple and easy to manufacture, but the adsorption efficiency for nitrates is insufficient
Solution Approach 1:
The patent applies composite materials by combining activated carbon granules with a thermoplastic binder and a zirconium compound to create an adsorption body that achieves superior nitrate adsorption performance. The composite structure allows the zirconium compound to enhance the adsorption capacity while the thermoplastic binder provides structural integrity, resolving the contradiction between simple composition and high adsorption efficiency.
Solution Approach 2:
The patent utilizes parameter changes by heating the mixture of activated carbon, thermoplastic binder, and zirconium compound to a temperature above the plastic range of the binder. This thermal treatment activates the binder to function as an adsorbent and binds the zirconium compound to the activated carbon, transforming the material properties to achieve enhanced nitrate removal performance.
2Reliability
If activated carbon granules are coated with thermoplastic binder and heated beyond plastic range, then the adsorption efficiency improves, but the manufacturing process becomes more complex
Solution Approach 1:
The patent applies preliminary action by pre-coating the activated carbon granules with the thermoplastic binder before adding the zirconium compound and forming the shaped body. This preliminary coating ensures uniform distribution and proper adhesion, simplifying the subsequent heating process and ensuring consistent adsorption performance without requiring complex multi-step manufacturing procedures.
3Reliability
If the zirconium compound is added to the activated carbon and binder mixture, then nitrate reduction increases by more than 3%, but the material composition becomes more complex
Solution Approach 1:
The patent uses the thermoplastic binder as an intermediary substance that facilitates the integration of the zirconium compound with the activated carbon. The binder acts as a carrier and binding agent, allowing the zirconium compound to be uniformly distributed and bound to the activated carbon granules, thereby achieving enhanced nitrate adsorption without creating an overly complex direct combination of all three materials.
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 addition of a zirconium compound to the activated carbon and binder significantly enhances the filter's adsorption efficiency, resulting in a nitrate reduction of more than 3% compared to conventional filters.
Implementation Method 1
Adsorbents are preferably water-insoluble porous materials that, due to their large surface area, bind water or other molecules to themselves through physical forces
Implementation Method 2
The activated carbon granules are coated with the thermoplastic binder under the influence of heat. The zirconium compound is added to the binder-coated activated carbon granules. The resulting mixture is compressed and then heated beyond the plastic range of the binder
Implementation Method 3
These materials are used for adsorption. Preferred adsorbents are bentonite, aluminum oxide, silica gel, zeolites, and especially preferably activated carbon
Implementation Method 4
Activated carbon is an open-pored, fine-grained coal with a large internal surface area. The pores are interconnected (open-pored). The internal surface area is preferably between 300 and 2000 m2/g of coal
Data Source
Figure 1~2
Figure 3
AI summary
Filter unit (1, 1'), in particular for the fine filtration of fluids and gases, comprising at least one inlet side (2), at least one outlet side (5) and an adsorption body (4) in the form of a shaped body which consists of an adsorption agent (4.1), in particular of grains of activated carbon, a binder (4.2) and a zirconium compound (4.3), wherein the adsorption agent (4.1) is coated with the binder (4.2) and further binds the zirconium compound (4.3) in the shaped body.