Biological Methane Reactor for Renewable Energy Storage
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Solution Overview
Problem
The energy industry faces challenges in converting intermittent renewable energy sources like solar and wind into a stable, storable form that can be used as a substitute for fossil fuels, particularly due to the lack of efficient methods for storing energy on an industrial scale and transporting it over long distances without significant losses.
Innovation Solution
A biological reactor system that converts electrical energy into methane by using methanogenic microorganisms in a two-chamber reactor with a proton permeable barrier, where carbon dioxide is converted into methane using electricity, allowing for storage and transportation via existing natural gas infrastructure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If solar energy is used as a primary resource, then energy independence is achieved, but the intermittent nature of solar energy prevents it from providing base-load energy
Solution Approach 1:
The patent converts solar energy into chemical energy stored in methane molecules, changing the energy storage parameter from intermittent electrical/thermal energy to stable chemical energy that can be stored and transported, thereby resolving the contradiction between energy independence and base-load availability
Solution Approach 2:
Methane serves as an intermediary energy carrier between solar energy sources and the energy consumption infrastructure, enabling the decoupling of energy production from consumption timing and location, thus providing both energy independence and reliable base-load power
2Duration of action of stationary object
If electricity is converted into methane, then energy storage and transportation are enabled, but the conversion process requires specific reactor conditions and microorganisms
Solution Approach 1:
The patent employs methanogenic microorganisms that naturally perform the conversion of electrical energy to methane through their metabolic processes, eliminating the need for complex artificial catalytic systems and reducing device complexity while maintaining long-term storage capability
Solution Approach 2:
The system controls temperature and pH parameters within optimal ranges to maintain microbial activity and conversion efficiency, achieving stable long-term energy storage through parameter optimization rather than system complexity
3Object-affected harmful factors
If carbon dioxide is converted into methane, then climate change is mitigated, but the process consumes electrical energy
Solution Approach 1:
The patent converts harmful atmospheric CO2 into useful methane energy carriers through electrochemical processes, transforming a climate problem into an energy solution while consuming electrical energy that can be supplied by renewable sources
Solution Approach 2:
The system simultaneously achieves multiple functions: CO2 sequestration, energy storage, and fuel production, making the energy consumption worthwhile by delivering multiple benefits from a single process
4Ease of manufacture
If existing natural gas infrastructure is used for methane distribution, then transportation and distribution are simplified, but the infrastructure was designed for fossil fuels rather than converted energy
Solution Approach 1:
Methane serves as a universal energy carrier that is compatible with existing natural gas infrastructure while representing converted renewable energy, enabling the same infrastructure to handle both fossil and bio-based fuels without requiring separate distribution systems
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 system provides a sustainable method for energy storage and transmission, reducing reliance on fossil fuels, mitigating climate change by removing CO2 from the atmosphere and offering a versatile energy form that can be used when needed, while also generating oxygen as a byproduct.
Implementation Method 1
converts electrical energy into methane by using methanogenic microorganisms in a two-chamber reactor with a proton permeable barrier, where carbon dioxide is converted into methane using electricity
Implementation Method 2
a biological reactor system that converts electrical energy into methane by using methanogenic microorganisms in a two-chamber reactor with a proton permeable barrier
Data Source
AI summary
A method of using electricity to produce methane includes maintaining a culture comprising living methanogenic microorganisms at a temperature above 50° C. in a reactor having a first chamber and a second chamber separated by a proton permeable barrier, the first chamber comprising a passage between an inlet and an outlet containing at least a porous electrically conductive cathode, the culture, and water, and the second chamber comprising at least an anode. The method also includes coupling electricity to the anode and the cathode, supplying carbon dioxide to the culture in the first chamber, and collecting methane from the culture at the outlet of the first chamber.