Solid Oxide Fuel Cell with Embedded Hydrocarbon Reforming Catalyst
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Solution Overview
Problem
Solid oxide fuel cells (SOFCs) face limitations in using higher carbon number hydrocarbon fuels due to nickel anode susceptibility to carbon deposition, which leads to mechanical fracture and reduces the operational flexibility of hydrocarbon fuels.
Innovation Solution
Embedding a hydrocarbon reforming catalyst in holes within a metal substrate of the SOFC, allowing higher carbon number fuels to contact the catalyst before the anode, thereby reducing carbon deposit formation and enabling the use of fuels like liquid propane gas or heavy naphtha, while also producing heat and hydrogen-rich exhaust for integration with other processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a nickel anode is used in SOFC, then good electrochemical performance is achieved, but carbon deposition occurs leading to mechanical fracture
Solution Approach 1:
The patent applies preliminary action by embedding hydrocarbon reforming catalysts in the metal substrate before the fuel reaches the anode. This pre-reforming of hydrocarbons prevents carbon deposition on the nickel anode, thereby maintaining both electrochemical performance and mechanical integrity over time.
Solution Approach 2:
The patent introduces an intermediary solution by using a metal substrate with embedded catalysts as a mediator between the hydrocarbon fuel and the nickel anode. This intermediary layer performs preliminary reforming, converting hydrocarbons to syngas before they contact the anode, thus preventing direct carbon deposition while maintaining power generation.
2Use of energy by moving object
If higher carbon number hydrocarbon fuels are used, then energy density is improved, but carbon deposition increases causing operational limitations
Solution Approach 1:
The patent enables the use of higher carbon number hydrocarbons by performing preliminary reforming in the metal substrate with embedded catalysts. This pre-treatment converts complex hydrocarbons into manageable syngas components, allowing high energy density fuels to be used without causing carbon deposition issues that would limit operational flexibility.
Solution Approach 2:
The patent changes the operational parameters by introducing catalytic reforming at the substrate level, which transforms the fuel conversion process. This parameter change allows the system to handle a broader range of hydrocarbon fuels (from methane to heavy naphtha) by modifying the chemical transformation pathway before the fuel reaches the electrochemical reaction zone.
3Reliability
If hydrocarbon reforming catalyst is embedded in metal substrate, then carbon deposition is reduced, but device complexity increases
Solution Approach 1:
The patent merges multiple functions into a single component by embedding the hydrocarbon reforming catalyst directly within the metal substrate structure. This integration combines the structural support function of the substrate with the catalytic reforming function, reducing the need for separate reforming components and thereby limiting the increase in device complexity.
Solution Approach 2:
The patent employs composite materials by creating a metal substrate with embedded catalyst particles or phases. This composite structure integrates the mechanical properties of the metal substrate with the catalytic activity of the reforming catalyst, achieving carbon deposition resistance while maintaining a relatively simple overall device architecture through material-level integration.
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 design enhances the operational temperature range of SOFCs, allowing the use of higher carbon number fuels, reduces carbon deposition, and increases the efficiency of hydrogen production, making the system more robust and cost-effective for various energy applications.
Implementation Method 1
a filled metal substrate including holes substantially filled with a permeable material that includes a hydrocarbon reforming catalyst
Implementation Method 2
an electrolyte layer proximate to the anode layer
Implementation Method 3
The filled metal substrate is fired with the permeable layer coated over the back to form a ceramic structure
Data Source
AI summary
A solid oxide fuel cell including a hydrocarbon reforming catalyst and a method for forming the solid oxide fuel cell are provided. An exemplary solid oxide fuel cell includes a cell. The cell includes a filled metal substrate including holes substantially filled with a permeable material that includes a hydrocarbon reforming catalyst, wherein the filled metal substrate has a front facing a fuel flow and a back facing an electrochemical stack. A permeable layer is formed on the back of the filled metal substrate that is in contact with the permeable material of the filled holes. The cell includes an anode layer proximate to the permeable layer, an electrolyte layer proximate to the anode layer, a diffusion barrier proximate to the anode layer, and a cathode proximate to the diffusion barrier.