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US 12,214,343 B2Granted
Preparation method and preparation system of carbon nanotubes
AssigneeLG Chem, Ltd.
InventorsOg Sin Kim, Uk Yeong Kim, Se Hyun Kim, Yon Jee Kim
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Abstract
The present invention relates to a carbon nanotube preparation method and system, which may improve the overall efficiency and economic feasibility of a reaction by collecting fine particles including carbon nanotube particles that have not grown enough and an unreacted catalyst produced during and after the reaction by using a separator at the exterior of a fluidized bed reactor, and then, injecting the fine particles as a bed prior to a subsequent cycle.
Claims10
A carbon nanotube preparation method, the method comprising:
- a reaction comprising reacting a catalyst and a reaction gas comprising a carbon source gas and a flowing gas in a fluidized bed reactor to produce carbon nanotubes;
- capturing a mixture gas produced during, and after finishing, the reaction in a separator provided at the exterior of the fluidized bed reactor, and separating fine particles in the mixture gas;
- and
- injecting the fine particles thus separated as a portion of a bed in the fluidized bed reactor prior to initiating a subsequent reaction,
- wherein a weight of the fine particles injected in the bed of the fluidized reactor is 1 to 30% by weight, based on a total weight of the bed and wherein a purity of the fine particles is 85 to 95%.
2 more elements
Dependencies are inferred from the claim text.