Inductive Heated Catalytic Element for Waste Gas
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Solution Overview
Problem
Conventional waste gas treatment systems, such as those using ceramic honeycomb filters/catalyst supports, are heavy, have low heat tolerance, and are costly, leading to delayed light-off temperatures in exothermic reactions, resulting in untreated waste gases being passed through filters for several minutes.
Innovation Solution
A catalytic element with an inductive heater and a fiber-supported catalytic layer on a thermally conductive and permeable metal or polymer mesh, which rapidly heats the waste gases to achieve light-off temperature, reducing untreated gas emissions and energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ceramic honeycomb filters/catalyst supports are used, then waste gas treatment is achieved, but the system becomes heavy and expensive
Solution Approach 1:
The patent changes the material parameters from heavy ceramic to lightweight metal foams and polymers, maintaining catalytic functionality while dramatically reducing weight. The metal foam structure provides sufficient mechanical strength and thermal stability at lower density compared to ceramic monoliths.
Solution Approach 2:
The invention uses composite structures combining metal foams with catalytic coatings, integrating the support structure and catalytic function into a single lightweight component. This composite approach replaces heavy ceramic substrates while maintaining treatment effectiveness.
2Stability of the object's composition
If dense heavy catalyst supports are used, then structural stability is improved, but light-off temperature is delayed
Solution Approach 1:
The patent changes the thermal parameters of the support material by using metal foams with higher thermal conductivity and lower heat capacity compared to dense ceramics. This allows the catalyst to reach light-off temperature faster while maintaining structural stability through the foam's engineered pore structure.
Solution Approach 2:
The inductive heating coil pre-heats the metal foam support and catalyst coating before waste gas enters the reactor. This preliminary heating action brings the catalyst to light-off temperature in advance, eliminating the delay period where untreated gas would pass through.
3Temperature
If conventional ceramic substrates are used, then high temperature resistance is achieved, but energy consumption increases
Solution Approach 1:
The patent changes the thermal properties of the support material to metal foams with optimized thermal conductivity and heat capacity. These materials achieve the necessary temperature resistance for catalytic operation while requiring less energy to heat up and maintain operating temperature, reducing overall energy consumption.
Solution Approach 2:
The exothermic catalytic reactions generate heat that is retained and distributed by the metal foam's thermal properties, enabling the system to maintain operating temperature through self-heating. This reduces or eliminates the need for continuous external energy input, allowing the system to sustain high temperature operation with minimal energy consumption.
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 catalytic element efficiently reduces untreated gas emissions by rapidly achieving light-off temperatures, saving energy and improving the efficiency of waste gas treatment, while being lightweight and cost-effective compared to traditional ceramic substrates.
Implementation Method 1
A catalytic element with an inductive heater and a fiber-supported catalytic layer on a thermally conductive and permeable metal or polymer mesh, which rapidly heats the waste gases to achieve light-off temperature
Implementation Method 2
a fiber-supported catalytic layer on a thermally conductive and permeable metal or polymer mesh
Data Source
AI summary
Catalytic elements are usable in waste gas control processes. The catalytic elements include an open inlet into a hollow body and a closed end thereby forcing fluid or gas through a porous catalytic layer of the element. The catalytic layer includes inorganic fibers and a catalyst disposed on or incorporated into the fibers. The catalytic element also includes an inductive heater disposed therein and a conductive layer about the inductive heater to transfer heat to the catalyst and fluid or gas.