Nickel Catalyst Methanation at Low Temperature
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Solution Overview
Problem
Current methods for converting carbon dioxide to methane are inefficient and often require high temperatures and non-renewable energy sources, limiting the scalability and sustainability of natural gas production.
Innovation Solution
A method using nickel-based catalysts made via atomic layer deposition, combined with renewable energy sources, to catalyze the conversion of carbon dioxide and hydrogen into methane at low temperatures and elevated pressures, utilizing biogas processing and water splitting or biomass gasification for reactant sourcing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional methods are used to convert carbon dioxide to methane, then the conversion can be achieved, but high temperatures and non-renewable energy sources are required, resulting in high energy consumption and low efficiency
Solution Approach 1:
The patent changes the operating parameters of the methanation process by using elevated pressures (5-30 bar) instead of atmospheric pressure, and low temperatures (25-200°C) instead of high temperatures. This parameter change enables the use of renewable energy sources and dramatically reduces energy consumption while maintaining high methane production efficiency through the specific pressure-temperature regime combined with atomic layer deposition catalysts
Solution Approach 2:
The patent replaces conventional thermal catalysis mechanisms with a novel combination of atomic layer deposition catalysts and electrochemical or photochemical activation. Instead of relying on high-temperature thermal processes, the system uses electricity from renewable sources to drive the methanation reaction at low temperatures, substituting thermal energy with electrical energy from wind, solar, or hydroelectric sources
2Reliability
If high temperatures are used for carbon dioxide methanation, then the reaction can proceed, but the process becomes less sustainable and increases energy consumption
Solution Approach 1:
The patent fundamentally changes the temperature parameter from conventional high temperatures (>700°C) to low temperatures (25-200°C), and pressure from atmospheric to elevated (5-30 bar). This parameter transformation maintains reaction effectiveness through the synergistic combination of ALD catalysts with superior activity and selectivity at low temperatures and elevated pressure, while eliminating the sustainability issues associated with high-temperature thermal processes
Solution Approach 2:
The patent substitutes thermal activation with electrochemical or photochemical activation mechanisms. Instead of using heat to drive the methanation reaction, the system employs electricity from renewable sources (wind, solar, hydroelectric) to activate the catalyst and drive the reaction at low temperatures, thereby maintaining reliability while achieving sustainability
3Productivity
If conventional catalysts are used, then the methanation process can operate, but the process lacks scalability and continuous operation capability
Solution Approach 1:
The patent applies atomic layer deposition to pre-form highly active and selective nickel catalysts with precise control over thickness, composition, and morphology before the methanation process begins. This preliminary catalyst preparation ensures optimal catalytic performance from the start, enabling immediate continuous operation without extended warm-up periods or frequent catalyst regeneration, thus achieving scalability and continuous operation capability
Solution Approach 2:
The patent replaces conventional catalyst preparation methods with atomic layer deposition, a sophisticated vapor-phase deposition technique that provides atomic-level precision in catalyst formation. This substitution enables the creation of catalysts with uniform thickness and composition that maintain high activity and selectivity under elevated pressure and low temperature conditions, facilitating continuous operation and scalability
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 continuous biogas upgrading to renewable natural gas, reducing energy consumption and increasing efficiency, while recycling greenhouse gases and utilizing renewable energy sources, thus addressing the inefficiencies and sustainability concerns of existing methods.
Implementation Method 1
The carbon dioxide and the hydrogen are combined to form a mixture. The mixture is reacted with a nickel catalyst made using atomic layer deposition to yield methane.
Implementation Method 2
a nickel catalyst made using atomic layer deposition
Implementation Method 3
obtaining hydrogen from water splitting or gasification of biomass
Implementation Method 4
obtaining carbon dioxide from biogas processing or post combustion carbon capture
Data Source
AI summary
An integrated carbon dioxide methanation system and a method of making methane are provided. An exemplary method of making methane includes generating electricity using renewable energy sources, obtaining carbon dioxide from biogas processing or post combustion carbon capture, obtaining hydrogen from water splitting or gasification of biomass, combining the carbon dioxide and the hydrogen to form a mixture, and reacting the mixture with a nickel catalyst made using atomic layer deposition to yield methane.