Nano-catalyst Filter Electrodeposition for Uniform Deposition
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Solution Overview
Problem
Existing methods for depositing catalysts on filters to treat exhaust gases, such as dip coating and wash coating, face challenges in achieving uniform distribution, which affects the catalytic efficiency and contact area with gases.
Innovation Solution
The method involves attaching an electrode layer to a porous filter and performing electrodeposition in a plating bath with nanowire and nanoparticle catalyst precursors, allowing for the formation of nanowire and nanoparticle catalysts inside and on the surface of the filter, respectively, to maximize the catalyst's contact area with gases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If dip coating or wash coating is used to deposit catalyst on filter, then the manufacturing process is simple, but the catalyst distribution is non-uniform
Solution Approach 1:
The patent replaces mechanical coating methods (dip coating, wash coating) with electrodeposition, which uses electrical fields to deposit catalyst particles. This substitution enables uniform catalyst distribution throughout the filter structure while maintaining manufacturing feasibility through an established electrochemical process
Solution Approach 2:
The patent changes the deposition parameters by controlling electrical current, voltage, and electrolyte composition during electrodeposition. By adjusting these parameters, uniform catalyst distribution is achieved throughout the filter pores, resolving the non-uniformity issue inherent in mechanical coating methods
2Ease of manufacture
If conventional coating methods are used, then the manufacturing cost is low, but the catalyst contact area with gas is insufficient
Solution Approach 1:
The patent utilizes the porous structure of the filter by depositing catalyst within the pores through electrodeposition. This approach maximizes the internal surface area available for catalyst-gas contact while maintaining cost-effectiveness through a single-step deposition process that penetrates deep into the filter structure
Solution Approach 2:
The patent creates a nested structure where catalyst particles are deposited within the porous matrix of the filter. This nesting arrangement increases the effective catalyst contact area by utilizing the internal pore surfaces, thereby enhancing catalytic efficiency without proportionally increasing manufacturing cost
3Reliability
If more catalyst is used to improve catalytic efficiency, then the treatment performance increases, but the manufacturing cost and complexity increase
Solution Approach 1:
The patent replaces mechanical coating with electrodeposition, which enables precise control over catalyst deposition量 and distribution. This substitution achieves high catalytic efficiency with optimized catalyst用量 by ensuring uniform distribution throughout the filter, thereby reducing overall catalyst requirements and manufacturing complexity
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
This approach enables efficient deposition of nano-catalysts with high catalytic efficiency using minimal catalyst amounts, improving the treatment of harmful gases like NOx by enhancing the catalyst's contact area and structural integration.
Implementation Method 1
performing electrodeposition; wherein the nanowire catalyst and the nanoparticle catalyst are formed inside the porous filter
Implementation Method 2
removing air in said porous filter by decompressing the plating bath
Data Source
AI summary
Provided is a method of manufacturing a nano-catalyst filter, which includes depositing through electrodeposition a catalyst precursor inside a porous filter to which an electrode layer is attached. Using this method, a nano-catalyst can be uniformly deposited inside a porous ceramic filter, and high catalyst efficiency can be obtained only using a small amount of the nano-catalyst.