Fibrous Substrate with Spacers for Hydrocarbon Pyrolysis
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Solution Overview
Problem
In hydrocarbon pyrolysis systems, the formation of airborne soot from gas-phase carbon reactions leads to surface fouling, decreased air quality, and electrical short-circuits, particularly in environments like spacecraft or submarines where oxygen recovery from carbon dioxide is crucial.
Innovation Solution
The use of fibrous substrates with a configuration that includes at least one roll and spacers to promote gas flow and prevent blockage, allowing for the deposition of carbon generated during pyrolysis while maintaining unimpeded gas flow and minimizing soot formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If gas-phase pyrolysis reactions are used to generate hydrogen from hydrocarbons, then hydrogen production efficiency is improved, but airborne soot formation increases causing surface fouling and electrical short-circuits
Solution Approach 1:
A fibrous substrate is introduced as an intermediary component between the gas-phase reactants and the reactor walls. The substrate provides surface area for carbon deposition, intercepting soot particles before they can foul reactor surfaces or short-circuit electrical equipment. The fibrous material acts as a sacrificial medium that captures carbon while maintaining gas flow pathways.
Solution Approach 2:
The harmful carbon soot that would otherwise cause fouling and short-circuits is redirected to deposit onto the fibrous substrate. By providing a dedicated carbon sink, the system converts the harmful byproduct into a controlled deposition process, protecting critical reactor components while maintaining continuous operation.
2Productivity
If carbon is deposited on surfaces during pyrolysis, then hydrogen production is maintained, but gas flow paths become blocked reducing reactor performance
Solution Approach 1:
The fibrous substrate creates localized deposition zones where carbon is intentionally allowed to accumulate. The porous fibrous structure provides numerous narrow pathways that concentrate carbon deposition in specific regions, leaving broader gas flow channels open. This spatial differentiation allows carbon capture without compromising overall gas flow.
Solution Approach 2:
The substrate introduces a new dimensional aspect to carbon deposition by using three-dimensional fibrous structures with varying pore sizes. Carbon deposits on the external and internal surfaces of the fibrous network, utilizing surface area in multiple dimensions, while maintaining interconnected void spaces for gas flow.
3Duration of action of stationary object
If continuous operation of pyrolysis reactor is maintained, then hydrogen supply is ensured, but carbon accumulation short-circuits electrical equipment
Solution Approach 1:
The fibrous substrate serves as a protective intermediary between the pyrolysis process and electrical equipment. By capturing carbon in the gas phase before it can reach electrical components, the substrate enables continuous reactor operation without the risk of short-circuits, extending operational life between maintenance cycles.
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 configuration reduces soot formation, extends the operational life of the pyrolysis reactor, and minimizes maintenance costs by ensuring continuous, unimpeded gas flow and efficient carbon deposition.
Implementation Method 1
The hydrocarbon may include methane. The substrates may include a fibrous substrate including at least one roll and at least one spacer. The fibrous substrate is configured to receive and store carbon deposited in the course of pyrolysis.
Implementation Method 2
The system may include a pyrolysis reactor configured to generate the hydrogen gas from a hydrocarbon through pyrolysis.
Data Source
AI summary
A fibrous substrate for depositing carbon generated from pyrolysis of a hydrocarbon may include at least one roll defining a plurality of rolled deposition surfaces configured to receive carbon generated from the pyrolysis. The fibrous substrate may further include at least one spacer between and spacing at least one pair of opposed deposition surfaces of the plurality of rolled deposition surfaces. A system for generating hydrogen gas may include a pyrolysis reactor configured to generate the hydrogen gas from a hydrocarbon through pyrolysis. The system may further include the fibrous substrate. A method for forming the fibrous substrate may include positioning the at least one spacer on a surface of a fibrous mat, and rolling the fibrous mat into the at least one roll.