Inductively Heated Pyrolysis Reactor for Oxygen Recovery
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Solution Overview
Problem
Current oxygen recovery systems in closed environments, such as space missions, are limited by the Sabatier reaction's requirement for excess hydrogen, resulting in only 50% oxygen recovery, with byproducts like methane and acetylene posing safety risks and operational challenges due to flammability and soot generation.
Innovation Solution
Integration of a pyrolysis reactor with a Sabatier reactor and Oxygen Generating Assembly (OGA) to recover hydrogen from methane, using pre-forms with high surface areas for carbon deposition, and induction heating to enhance hydrogen yield and reduce hazardous byproducts, achieving a balanced stoichiometry for 100% oxygen recovery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the Sabatier reaction is used to reduce carbon dioxide, then oxygen recovery is achieved, but hydrogen consumption exceeds generation capacity limiting recovery to 50%
Solution Approach 1:
The patent recovers hydrogen from methane produced by the Sabatier reaction through pyrolysis, transforming a waste product into a valuable resource. The methane that would otherwise be vented is instead fed to a pyrolysis reactor that decomposes it into hydrogen and carbon, with the hydrogen being recycled back to the Sabatier reactor. This closed-loop approach resolves the hydrogen deficit by recovering it from the reaction byproduct.
Solution Approach 2:
Methane serves as an intermediary substance that connects the Sabatier reaction and hydrogen production. The Sabatier reaction produces methane as a byproduct, which then becomes the feedstock for the pyrolysis reactor. This intermediary enables the transfer of hydrogen from the water electrolysis process (through methane formation and decomposition) back to the oxygen production process.
2Quantity of substance
If catalytic reactions (Bosch or Boudouard) are used to generate carbon, then carbon is produced, but catalyst fouling requires periodic cleaning generating carbon dust
Solution Approach 1:
The patent replaces catalytic chemical reactions with a thermal pyrolysis process. Instead of using catalysts that become fouled and require mechanical cleaning (generating dust), the system uses high-temperature thermal decomposition without catalysts. The carbon is deposited directly onto a substrate through controlled pyrolysis, eliminating the need for catalyst maintenance and avoiding carbon dust generation from catalyst cleaning operations.
3Quantity of substance
If direct carbon soot generation is used, then carbon is produced, but soot represents an inhalation hazard and can clog reactors and tubes
Solution Approach 1:
The patent creates a localized controlled environment within the pyrolysis reactor where carbon deposition occurs under specific conditions. The pyrolysis chamber is designed to confine the high-temperature process, and carbon is deposited onto a designated substrate rather than forming uncontrolled soot. This localized control ensures carbon is produced in a manageable form that does not become airborne hazardous particles or clog external equipment.
Solution Approach 2:
The patent converts the potentially harmful uncontrolled soot formation into a beneficial controlled carbon deposition process. By using pyrolysis with controlled parameters, the carbon that would otherwise be hazardous soot is instead deposited as a useful byproduct on a substrate, while the hydrogen is recovered and reused. The process transforms a hazard into a resource.
4Productivity
If acetylene is generated as a byproduct, then the Sabatier reaction proceeds, but acetylene is flammable and explosive requiring prompt venting
Solution Approach 1:
The pyrolysis reactor serves as an intermediary processing step that handles the hazardous acetylene intermediate. Rather than directly venting the explosive acetylene from the Sabatier reaction, the system feeds it to the pyrolysis reactor where it is thermally decomposed under controlled conditions into hydrogen and carbon. This intermediary step safely transforms the hazardous substance into less hazardous products.
Solution Approach 2:
The patent converts the hazardous acetylene byproduct into a beneficial resource. The acetylene that would require dangerous venting is instead used as feedstock for the pyrolysis reactor, where it is decomposed to produce additional hydrogen for the Sabatier reaction and carbon for deposition. The harmful byproduct becomes a valuable resource that improves overall system efficiency.
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
The system effectively recovers hydrogen from methane, restoring the balance between carbon dioxide and hydrogen, enabling 100% theoretical oxygen recovery while minimizing hazardous byproducts and operational risks.
Implementation Method 1
an induction coil that is outside of and operatively adjacent to the active section
Implementation Method 2
wherein the pre-forms are configured to adhere carbon
Implementation Method 3
wherein the active section is configured to pyrolyze a hydrocarbon
Data Source
AI summary
A pyrolysis reactor includes a chamber having an inactive section and an active section. The inactive section is configured to hold an inactive pre-form capable of adhering carbon. The active section is configured to hold an active pre-form capable of adhering carbon. An induction coil is outside of and operatively adjacent the active section, and wherein the active section is configured to pyrolyze a hydrocarbon.