Rotatable Collection Chamber for Fullerene Deposition
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Solution Overview
Problem
Current methods for producing fullerenes and carbon nanotubes face challenges such as limited production quantities, sensitivity to ambient conditions, and inefficiencies in collection processes, particularly in arc discharge systems where carbon-containing materials often pass through filters rather than being deposited in the collection vessel.
Innovation Solution
The development of an apparatus and method involving an arc chamber with a rotatable graphite element support for continuous or semi-continuous production of carbon-containing materials, where graphite elements are moved towards and away from the arc discharge position, and a collection chamber with a rotatable element that directs carbon-containing material to the wall for increased deposition, along with a solvent introduction system for anaerobic collection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a gas outlet with a filter is provided in the collection vessel to allow helium gas to exit, then the apparatus can maintain gas flow, but carbon-containing material passes through the filter instead of being deposited in the vessel
Solution Approach 1:
The patent removes the gas outlet from the collection vessel entirely, extracting the problematic component that caused material loss. The helium gas is allowed to escape through the vacuum port instead, eliminating the filter that was capturing valuable carbon-containing material.
Solution Approach 2:
The vacuum port serves as an intermediary mechanism that allows helium gas to exit the collection vessel without requiring a filter. By using the vacuum port as the gas exit pathway, the system avoids the harmful effect of material capture while maintaining necessary gas flow.
2Quantity of substance
If a condensing wall cooled with liquid nitrogen is used to deposit soot, then carbon-containing compounds are captured, but the process requires batch operation with significant downtime for soot removal
Solution Approach 1:
The patent implements continuous operation by allowing the collection vessel to be continuously evacuated through the vacuum port while maintaining the arc discharge process. The system can operate continuously for extended periods (e.g., 24 hours) without batch interruptions, as the vacuum port enables ongoing gas removal and potential solvent introduction without breaking the process.
Solution Approach 2:
The vacuum port is pre-configured to allow introduction of solvents before or during the collection process. This preliminary preparation enables continuous operation by allowing solvent washing of deposited material without requiring chamber opening or batch termination.
3Manufacturing precision
If graphite electrodes are evaporated in an atmosphere of helium to produce fullerenes, then carbon-containing materials are synthesized, but production is limited to small quantities unsuitable for commercial exploitation
Solution Approach 1:
The patent segments the production system into distinct functional zones: an arc discharge chamber for synthesis and a collection vessel for accumulation. This segmentation allows the collection vessel to be scaled up in size while maintaining the arc discharge process, thereby increasing overall production capacity without compromising synthesis quality.
Solution Approach 2:
The patent transitions from small-scale batch production to large-scale continuous production by adding the dimension of time continuity and spatial expansion. The collection vessel provides expanded storage capacity, and the continuous operation mode enables macroscopic quantity accumulation over extended periods.
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 production of fullerenes and other carbon-containing materials in a continuous or semi-continuous manner, enhancing deposition efficiency and reducing downtime, allowing for the collection of higher quantities of carbon-containing materials while maintaining their quality.
Implementation Method 1
forming an arc in the chamber to effect vaporisation of material of the graphite element in the arc discharge position
Implementation Method 2
The hot carbon-containing vapour entering the chamber is cooled at the condensing wall and soot comprising the target carbon-containing compounds is deposited onto the condensing wall
Data Source
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AI summary
The present invention provides various methods and apparatus for the production of fullerenes and other carbon-containing materials. In some aspects, the invention provides an arc chamber comprising a graphite element support, wherein the support comprises a rotatable frame adapted for moving each graphite element towards and away from an arc discharge position. In other aspects, the invention provides a collection chamber for collecting carbon-containing materials produced in an arc chamber, wherein the collection chamber comprises an inlet and a rotatable element arranged to direct the carbon-containing material to a wall of the collection chamber, wherein the sectional area occupied by the rotatable element increases with distance from the inlet. In other aspects, the invention provides a collection chamber comprising means for isolating the collection chamber from an arc discharge apparatus and an inlet for the introduction of solvent into the collection chamber.