Microbial Electrosynthesis of Multi-Carbon Chemicals from CO2
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Solution Overview
Problem
Current methods for producing hydrocarbon chemicals and molecular oxygen from carbon dioxide are inefficient and costly, lacking a biologically-based system that can effectively utilize carbon dioxide as a source under electrical stimulation, similar to photosynthesis in plants.
Innovation Solution
A system comprising a reaction vessel with an anode and cathode electrodes, a biofilm of biologically active material, and a source of electrical energy to generate carbonaceous chemicals from carbon dioxide, using a microbial electrosynthesis process that produces compounds like acetate, butanol, and formate through direct electron transfer from electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional methods are used to produce hydrocarbon chemicals and molecular oxygen from carbon dioxide, then production can be achieved, but the process is inefficient and costly
Solution Approach 1:
The patent introduces microorganisms as biological intermediaries that facilitate the conversion of carbon dioxide to hydrocarbon chemicals. These microorganisms act as mediators between the electrical energy source and the chemical synthesis process, enabling efficient carbon fixation and conversion that conventional direct methods cannot achieve. The microbial systems provide enzymatic pathways that lower activation energies and improve overall process efficiency.
Solution Approach 2:
The patent replaces conventional mechanical/thermal chemical synthesis methods with a biologically-based electrochemical system. Instead of using high energy input through traditional chemical reactors, the system uses electrical energy to drive microbial metabolism, substituting mechanical energy input with electrical energy that is more efficiently converted into chemical bonds through biological pathways.
2Ease of manufacture
If conventional chemical synthesis or extraction methods are used, then chemicals can be produced, but the processes are costly and not environmentally sustainable
Solution Approach 1:
The patent converts carbon dioxide, a harmful greenhouse gas, into valuable hydrocarbon chemicals and fuels. By using microorganisms that can fix and convert CO2 through metabolic pathways, the system transforms an environmental pollutant into economically valuable products, simultaneously addressing environmental sustainability and production cost concerns.
Solution Approach 2:
The patent changes the fundamental parameters of the chemical synthesis process by using biological systems operating under mild conditions (ambient temperature and pressure) rather than extreme conditions required by conventional methods. This parameter change enables the use of renewable electrical energy sources and reduces equipment costs, making the process more economical and environmentally friendly.
3Loss of energy
If a biologically-based system is developed to utilize carbon dioxide under electrical stimulation, then energy efficiency improves, but the system complexity increases
Solution Approach 1:
The patent employs microorganisms that perform multiple functions within a single system: they serve as electron acceptors, carbon fixation enzymes, and product synthesis factories simultaneously. This multi-functionality reduces the need for separate processing units and simplifies the overall system architecture while maintaining high energy efficiency through integrated biological pathways.
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 production of multi-carbon organic compounds and molecular oxygen from carbon dioxide, offering a more energy-efficient and economical alternative to traditional methods, with the potential for scalable, renewable energy-powered chemical synthesis.
Implementation Method 1
electrons are supplied directly to a biofilm from a cathode
Implementation Method 2
microbial electrosynthesis process that produces compounds like acetate, butanol, and formate through direct electron transfer from electrodes
Implementation Method 3
an anode oxidation reaction that produces molecular oxygen
Implementation Method 4
oxidize water to produce molecular oxygen and supply electrons
Implementation Method 5
lacking a biologically-based system that can effectively utilize carbon dioxide as a source under electrical stimulation, similar to photosynthesis in plants
Data Source
AI summary
The invention provides systems and methods for generating organic compounds using carbon dioxide as a source of carbon and electrical current as an energy source. In one embodiment, a reaction cell is provided having a cathode electrode and an anode electrode that are connected to a source of electrical power, and which are separated by a permeable membrane. A biological film is provided on the cathode. The biological film comprises a bacterium that can accept electrons and that can convert carbon dioxide to a carbon-bearing compound and water in a cathode half-reaction. At the anode, water is decomposed to free molecular oxygen and solvated protons in an anode half-reaction. The half-reactions are driven by the application of electrical current from an external source. Compounds that have been produced include acetate, butanol, 2-oxobutyrate, propanol, ethanol, and formate.