Oxygen/Sulfur Electrolytic Flow Cell with Porous Anodes
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Solution Overview
Problem
Current power generation technologies, such as fuel cells and electrolytic devices, face efficiency limitations due to internal resistance and material geometries, and existing sulfur-based power generation methods are not scalable or environmentally friendly, particularly in utilizing sulfur from industrial processes or bacterial conversion of waste organics which can lead to clogging issues.
Innovation Solution
A carbon-neutral power generation method utilizing a multi-step process combining biomining and an oxygen/sulfur electrolytic flow cell arrangement, where sulfate-reducing bacteria convert organic waste into hydrogen sulfide gas, and the spent sulfur is recirculated for recycling, using expanded surface area/porous electrodes and a biominer system to maintain a healthy bacterial colony and optimize power production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If bacteria are grown directly on electrodes for power generation, then power production is achieved, but the bacteria clog the operating components
Solution Approach 1:
The system divides the power generation process into two separate components: a biominer where bacteria convert organic waste to hydrogen sulfide, and an electrolytic cell where sulfur is oxidized to generate power. This segmentation prevents bacterial clogging of power generation components while maintaining power production capability.
Solution Approach 2:
The bacteria are extracted from the electrolytic cell environment and placed in a separate biominer system. This removes the harmful clogging effect from the power generation components while preserving the beneficial power production function through sulfur oxidation in the electrolytic cell.
2Power
If conventional fuel cells are used for power generation, then power is produced, but efficiency is limited by internal resistance and material geometries
Solution Approach 1:
The electrolytic cell uses porous sulfur electrodes that provide large surface area for electrochemical reactions. This porous structure reduces internal resistance and improves efficiency by enabling better reactant access and product removal, overcoming the efficiency limitations of conventional fuel cells.
3Power
If sulfur is used as fuel in electrolytic cells, then power generation is achieved, but the anode is consumable and requires replacement
Solution Approach 1:
The system creates a continuous sulfur cycle where spent sulfur from the electrolytic cell anode is recirculated back to the biominer for regeneration. This continuous regeneration process eliminates the need for anode replacement and sustains long-term power generation without material loss.
Solution Approach 2:
The biominer system automatically regenerates sulfur from spent sulfur and organic waste, making the fuel supply self-sustaining. The system uses its own waste products (spent sulfur and organic matter) to continuously produce fresh sulfur fuel, eliminating external fuel input requirements.
4Loss of substance
If industrial sulfur disposal processes are used, then sulfur waste is removed, but environmental friendliness is compromised
Solution Approach 1:
The system converts harmful sulfur waste and organic pollutants into valuable electricity and regenerated sulfur fuel. By using sulfate-reducing bacteria to convert organic waste to hydrogen sulfide and then oxidizing it in the electrolytic cell, the system transforms environmental hazards into beneficial energy production and waste reduction.
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 scalable, commercial-sized, semi-distributed power generation with reduced carbon emissions, achieving efficient power production by recycling sulfur and utilizing waste materials, potentially replacing natural gas and coal combustion, with a high sulfur-to-energy conversion rate.
Implementation Method 1
biological conversion and removal of sulfur from fecal matter as well as other biologically digestible materials containing sulfur and carbon, i.e., biomining
Implementation Method 2
oxidizing the reduced sulfur in an oxygen/sulfur electrolytic flow cell arrangement
Implementation Method 3
oxygen/sulfur electrolytic flow cell arrangement
Implementation Method 4
expanded surface area/porous electrodes
Data Source
AI summary
Apparatus and methods to generate electricity from air and municipal sewage, manure, food waste and/or potentially other organic waste sources using sulfate reducing bacteria, SRB. The SRB produce hydrogen sulfide in an apparatus named a biominer. The odorous gas is then scrubbed into an aqueous solution. The solution is sent to an electrolytic continuous flow cell power generator on the anode side where the sulfur is oxidized to sulfate and is recycled to the biominer process. The generator cathode side uses a standard oxygen cell chemistry.