Liquid Fuel Synthesis from Renewable Electricity and Hydrocarbon Feedstocks
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Solution Overview
Problem
The variability of renewable energy sources like wind and solar power poses challenges in matching electricity production with consumer needs, and existing methods for converting this energy into hydrogen or other fuels are inefficient, particularly in utilizing the oxygen generated during electrolysis.
Innovation Solution
A system that uses renewable energy to power an oxygen separation unit for partial oxidation conversion into synthesis gas, which is then converted into liquid fuels, allowing for adjustable production levels and incorporating supplemental non-renewable energy sources and oxygen storage to maintain desired fuel production, while co-locating facilities with renewable energy farms to minimize electricity costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If electrolysis is used to produce hydrogen from renewable electricity, then hydrogen is generated, but the oxygen produced is typically released rather than utilized, representing a loss of valuable byproduct
Solution Approach 1:
The patent converts the previously wasted oxygen byproduct from electrolysis into a valuable resource by feeding it to a reformer unit. The oxygen reacts with hydrocarbon feedstock in the reformer to produce additional synthesis gas, thereby converting what was considered waste (oxygen release) into a beneficial contribution toward hydrogen production goals.
Solution Approach 2:
The patent merges the electrolysis process with a reformer process in an integrated system. The oxygen stream from the electrolyzer is combined with the hydrocarbon feedstock stream and fed into the reformer, creating a synergistic arrangement where the byproduct of one process becomes the reactant for another, improving overall system efficiency.
2Object-generated harmful factors
If variable renewable electricity is used for fuel production, then greenhouse gas emissions are reduced, but production levels fluctuate and cannot be reliably matched to consumer needs
Solution Approach 1:
The patent employs dynamic operation of multiple parallel processes (electrolysis and reforming) that can be independently adjusted. The system can flexibly scale production from either or both processes depending on renewable electricity availability, allowing the facility to maintain reliable output levels while adapting to variable input conditions.
Solution Approach 2:
The system changes operational parameters by adjusting the ratio of electricity used for electrolysis versus reforming based on renewable energy availability. When renewable electricity is abundant, electrolysis is prioritized; when availability drops, the system shifts to reforming mode, maintaining overall production reliability while responding to changing conditions.
3Loss of energy
If surplus renewable electricity is stored or transmitted, then energy waste is reduced, but infrastructure costs and scale requirements increase substantially
Solution Approach 1:
The system provides self-service by directly consuming surplus renewable electricity at the point of generation through on-site electrolysis and fuel synthesis equipment. This eliminates the need for external storage infrastructure or complex transmission networks, as the facility itself absorbs and utilizes the excess energy to produce liquid fuels.
Solution Approach 2:
The patent replaces mechanical energy storage systems (such as pumped hydro or compressed air) with chemical energy storage in the form of liquid fuels. Instead of storing electricity physically, the system converts surplus electrical energy into storable chemical bonds in hydrocarbon-based liquid fuels, which can be stored and transported using existing infrastructure.
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 effectively addresses the variability of renewable energy by optimizing liquid fuel production, reducing greenhouse gas emissions, and decreasing the cost of electricity in hydrocarbon-to-liquid fuel conversion, enabling the use of surplus renewable energy and providing a flexible and efficient means to produce fuels like methanol and synthetic diesel.
Implementation Method 1
the renewable energy source electricity powers an oxygen separation unit which provides oxygen for partial oxidation conversion into synthesis gas
Implementation Method 2
Oxygen from the air separation unit and a hydrocarbon feedstock is also provided to the synthesis gas generation unit, thereby causing partial oxidation reactions in the synthesis gas generation unit in a process that converts the hydrocarbon feedstock into synthesis gas
Implementation Method 3
The synthesis gas is then converted into a liquid fuel
Data Source
AI summary
A method for converting renewable energy source-electricity and a hydrocarbon feedstock into a liquid fuel by providing a source of renewable-electrical energy in communication with a synthesis gas generation unit and an air separation-unit. Oxygen from the air separation unit and a hydrocarbon feedstock is provided to the-synthesis gas generation unit, thereby causing partial oxidation reactions in the synthesis gas-generation unit in a process that converts the hydrocarbon feedstock into synthesis gas. The synthesis gas is then converted into a liquid fuel.