Solar-Driven Solid Oxide Cell CO₂ Conversion to Hydrocarbon Fuels
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Solution Overview
Problem
Current carbon capture and storage methods face challenges such as high costs, location limitations, and leakage concerns for geological sequestration, and existing conversion technologies do not effectively utilize solar energy to convert CO2 and H2O into hydrocarbon fuels.
Innovation Solution
A process and system utilizing a solid oxide electrolyzer or fuel cell to convert CO2 and H2O into hydrocarbon fuels using solar energy, where the syngas production cell includes a porous cathode, solid oxide electrolyte, and anode, with the addition of gaseous hydrocarbons to produce syngas, which is then converted into hydrocarbon fuel streams using a catalytic reactor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional carbon capture and storage methods are used, then CO2 can be captured and stored, but the costs are high and location limitations exist
Solution Approach 1:
The invention converts CO2, a harmful greenhouse gas, into useful hydrocarbon fuels through solar-driven electrochemical conversion. This transforms the waste product of combustion into a valuable energy carrier, eliminating the need for separate storage infrastructure while addressing both emissions reduction and energy production needs
Solution Approach 2:
The system changes the chemical state of CO2 from a stable greenhouse gas to reactive intermediates and finally to hydrocarbon fuels through controlled electrochemical reduction. By altering the oxidation state and chemical composition, the system transforms an environmental problem into an energy solution
2Productivity
If existing conversion technologies are used, then CO2 can be converted, but solar energy is not effectively utilized
Solution Approach 1:
The invention merges solar thermal energy conversion with electrochemical CO2 reduction in an integrated system. Solar heat drives the electrochemical reactions in the electrolyzer cell, combining renewable energy capture with carbon conversion to produce fuels, thereby effectively utilizing solar energy for dual purposes of power generation and CO2 utilization
Solution Approach 2:
The system performs multiple functions simultaneously: solar energy capture, thermal energy conversion, electrochemical CO2 reduction, and fuel synthesis. This multi-functionality allows the same system to address energy production, emissions reduction, and fuel synthesis needs
3Power
If solar thermal systems are used for electricity generation, then large amounts of electricity can be produced, but thermal energy storage requires large tanks with heat loss
Solution Approach 1:
The system utilizes phase transitions of water (liquid to vapor) in the heat exchange process, where solar thermal energy heats water to generate steam that drives the electrochemical conversion. This phase change efficiently transfers thermal energy from the solar field to the CO2 conversion process without requiring large storage tanks
Solution Approach 2:
The invention replaces mechanical thermal energy storage systems (large tanks) with an electrochemical conversion system. Instead of storing thermal energy mechanically in insulated tanks, the system directly converts solar thermal energy into chemical energy stored in hydrocarbon fuel bonds, eliminating heat loss associated with thermal storage
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 the efficient conversion of CO2 and H2O into hydrocarbon fuels, providing a sustainable alternative to fossil fuels and addressing the limitations of existing carbon capture and storage methods by leveraging solar energy for fuel production.
Implementation Method 1
a solid oxide electrolyte, wherein the solid oxide electrolyte is configured to conduct the oxygen ions from the cathode to the anode
Implementation Method 2
a solar field configured to heat a heat transfer fluid
Implementation Method 3
a steam generator configured to transfer heat from the heat transfer fluid to a water stream to create a generated steam stream
Implementation Method 4
the generated steam stream is configured to drive the steam turbine, and the steam turbine is configured to drive the electric generator to create electricity
Implementation Method 5
the steam turbine is configured to drive the electric generator to create electricity
Implementation Method 6
the porous cathode is configured to reduce the carbon dioxide and water to produce the carbon monoxide, hydrogen, and oxygen ions
Implementation Method 7
the porous anode is configured to oxidize the hydrogen and the gaseous hydrocarbon to produce the water, carbon monoxide, and electrons
Implementation Method 8
which is then converted into hydrocarbon fuel streams using a catalytic reactor
Data Source
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AI summary
A process for converting carbon dioxide to hydrocarbon fuels using solar energy harnessed with a solar thermal power system to create thermal energy and electricity, using the thermal energy to heat a fuel feed stream, the heated fuel feed stream comprising carbon dioxide and water, the carbon dioxide captured from a flue gas stream, converting the carbon dioxide and water in a syngas production cell, the syngas production cell comprising a solid oxide electrolyte, to create carbon monoxide and hydrogen, and converting the carbon monoxide and hydrogen to hydrocarbon fuels in a catalytic reactor. In at least one embodiment, the syngas production cell is a solid oxide fuel cell. In at least one embodiment, the syngas production cell is a solid oxide electrolyzer cell.