3D-Printed Ceramic Lattice Heating Element for Ammonia Dissociation
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Solution Overview
Problem
Conventional electric catalyst units for vehicles are bulky, require high power consumption, have limited surface area for endothermic reactions, are prone to leakage, and fail under high temperature, pressure, and corrosive conditions, making them unsuitable for on-board ammonia dissociation in vehicles.
Innovation Solution
A ceramic-based, 3D printed lattice heating element within a ceramic tube that promotes ammonia dissociation by inducing turbulence and maintaining high temperatures through Joule heating, using a modular design with power feed-throughs and catalyst coatings to manage heat and pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If conventional planar metallic conductors are used for heating, then the device structure is simple, but the surface area is limited and cannot provide sufficient heat for ammonia dissociation
Solution Approach 1:
The patent transitions from conventional two-dimensional planar conductors to three-dimensional lattice structures. The lattice heating element comprises multiple vertically stacked heating zones with interstitial channels, creating a three-dimensional configuration that dramatically increases the heating surface area while maintaining a compact footprint. This dimensional transformation allows the system to provide sufficient heat surface area for ammonia dissociation without proportionally increasing device complexity.
Solution Approach 2:
The lattice structure functions as a porous material with interconnected channels and void spaces. The interstitial channels between lattice elements create a three-dimensional porous network that increases the effective surface area for heat transfer. This porous configuration allows ammonia gas to flow through and around the heating elements, maximizing contact between the gas and heating surfaces while maintaining structural integrity.
2Reliability
If conventional steel catalytic converters are used, then the device is inexpensive and easy to manufacture, but it cannot be hermetically sealed and is prone to leakage under pressure
Solution Approach 1:
The patent employs composite material construction, combining ceramic materials with metallic components. The ceramic tube provides hermetic sealing and corrosion resistance, while metallic lattice elements provide heating functionality. This composite approach allows the system to achieve hermetic seal integrity and pressure containment without requiring complex manufacturing processes, as the ceramic and metallic components can be manufactured separately and assembled together.
Solution Approach 2:
The ceramic tube acts as an intermediary barrier between the high-pressure ammonia gas and the external environment. This ceramic intermediary provides hermetic sealing and corrosion protection, preventing leakage while allowing the internal metallic lattice structure to function. The ceramic material serves as a mediator that protects the system from the harsh chemical environment while maintaining pressure containment.
3Reliability
If metallic support structures are used for catalysts, then the structure is strong and can be manufactured easily, but it fails under high temperature, pressure, and corrosive conditions
Solution Approach 1:
The patent uses composite material construction where ceramic materials provide thermal and chemical resistance while metallic lattice elements provide mechanical strength. The ceramic tube and coating layers protect the internal structure from high temperature and corrosive ammonia, while the metallic lattice maintains structural integrity. This composite approach resolves the contradiction by combining the advantages of both material types.
Solution Approach 2:
The patent changes the material parameters by transitioning from purely metallic support structures to ceramic-based composite structures. The ceramic materials have superior resistance to high temperature and corrosion, allowing the system to operate reliably under harsh conditions. This parameter change in material composition directly improves reliability while maintaining sufficient mechanical strength through the lattice structure design.
4Productivity
If conventional electric catalyst units are used, then the device is relatively compact, but it consumes excessive power and has limited surface area for endothermic reactions
Solution Approach 1:
The patent increases productivity by transitioning from two-dimensional planar heating to three-dimensional lattice heating. The vertically stacked heating zones with interstitial channels create a three-dimensional configuration that dramatically increases the heating surface area available for ammonia dissociation. This dimensional transformation allows more efficient use of energy by distributing heat across a much larger surface area, improving ammonia dissociation efficiency without proportionally increasing power consumption.
Solution Approach 2:
The lattice structure creates a porous three-dimensional network with interstitial channels that increase the effective heating surface area. The porous configuration allows ammonia gas to flow through and around the heating elements, maximizing heat transfer efficiency. This porous structure improves productivity by increasing the volume of gas that can be processed simultaneously while maintaining reasonable power consumption through efficient heat distribution.
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 system efficiently dissociates ammonia at high temperatures and pressures, preventing failure and leakage, while maintaining a hermetic seal and ensuring effective ammonia dissociation even in harsh vehicle environments.
Implementation Method 1
maintaining high temperatures through Joule heating
Implementation Method 2
promotes ammonia dissociation by inducing turbulence
Implementation Method 3
catalyst coatings to manage heat and pressure
Data Source
AI summary
The present invention relates, in general, to a system and method for focusing gas distribution through at least one three-dimensionally (3D) printed lattice heating elements within an electric catalyst unit to promote ammonia dissociation. The present invention allows gaseous ammonia to be continuously heated under turbulence as it flows through non-linear paths within a 3D printed lattice heating element. The lattice structure of the heating element provides a balance between surface area and heat dissipation, allowing the heating elements to reach a suitable temperature to perform ammonia dissociation, but which are not oversaturated with heat which could result in failure or melting of the heating element.