Seedless particles with carbon allotropes

A carbon allotrope, carbon nanoparticle technology, applied in nanocarbon, inorganic chemistry, carbon compounds, etc., can solve the problems of high cost and difficult to collect

Active Publication Date: 2019-09-27
利腾股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Additionally, some of these pyrolysis or cracking processes produce very small (e.g., less than 100 nm in diameter) particles that are difficult and expensive to collect

Method used

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  • Seedless particles with carbon allotropes
  • Seedless particles with carbon allotropes
  • Seedless particles with carbon allotropes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0130] Example 1: Graphite and Graphene Particles Produced Using a Microwave Plasma Reactor

[0131] In this first example, carbon particles and aggregates containing graphite and graphene were produced using the microwave plasma reactor system described in the previous embodiments. The microwave plasma reactor in this example has a main body made of stainless steel and a quartz inner wall material. However, a quartz inner wall material is not required in all cases and similar carbon materials can be produced in a quartz-free reactor in or adjacent to the reaction zone. The reaction zone volume is about 45 cm 3 . The precursor material is methane, optionally mixed with a supply gas such as argon. The flow rate of methane is 1 to 20 L / min, and the flow rate of the supply gas is 0 to 70 L / min. With these flow rates and tool geometries, the gas residence time in the reaction chamber is from about 0.001 seconds to about 2.0 seconds, and the carbon particle production rate is f...

Embodiment 2

[0139] Example 2: Graphite, graphene and multi-walled spherical fullerene particles produced using a microwave plasma reactor

[0140]In this second example, carbon particles containing graphite, graphene, MWSF and attached MWSF were produced using the microwave plasma reactor system described in Example 1 by adding filaments comprising tantalum / tungsten resistive wires and Aggregates. The precursor material is methane, optionally mixed with a supply gas such as argon. The flow rate of methane is 1 to 100 L / min, and the flow rate of the supply gas is 0 to 100 L / min. With these flow rates and tool geometries, the gas residence time in the reaction chamber is from about 0.001 seconds to about 2.0 seconds, and the carbon particle production rate is from about 0.1 g / hour to about 15 g / hour. After the aggregate is synthesized and collected, the aggregate is post-treated by annealing at a temperature of 1000°C to 2200°C for about 60 to about 600 minutes in an inert atmosphere.

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Embodiment 3

[0148] Example 3: Graphite, Graphene and Amorphous Carbon Particles Produced Using a Microwave Plasma Reactor

[0149] In this third example, carbon particles and aggregates containing graphite, graphene, and amorphous carbon were produced using a microwave plasma reactor system as described in Example 1. The precursor material contains methane, or isopropanol (IPA), or ethanol, or condensed hydrocarbons such as hexane. A carbon-containing precursor is optionally mixed with a supply gas such as argon. When gaseous methane is used, the flow rate of methane is 1 to 20 L / min, and the flow rate of supply gas is 0 to 70 L / min. When the precursor material is a liquid mixture of IPA and ethanol, the flow rate of the liquid mixture is 0.1 to 100 mL / minute. In some other cases, condensing hydrocarbons were used and the flow rate of the hydrocarbons was about 3 L / min. With these flow rates and tool geometries, the gas residence time in the reaction chamber is from about 0.001 seconds...

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Abstract

Carbon materials having carbon aggregates including carbon nanoparticles and no seed particles, are disclosed. In various embodiments, the nanoparticles include graphene, optionally with multi-walled spherical fullerenes and/or another carbon allotrope. In various embodiments, the nanoparticles and aggregates have different combinations of: a Raman spectrum with a 2D-mode peak and a G-mode peak, and a 2D/G intensity ratio greater than 0.5, a low concentration of elemental impurities, a high Brunauer-Emmett and Teller (BET) surface area, a large particle size, and/or a high electrical conductivity. Methods are provided to produce the carbon materials.

Description

[0001] related application [0002] This application claims priority to U.S. Patent Application No. 15 / 711,620, filed September 21, 2017, which is a continuation-in-part of U.S. Patent Application No. 15 / 676,649, filed August 14, 2017, which is A continuation of US Patent Application No. 15 / 428,474 filed February 9, 2017 and published as US Patent No. 9,767,992; all of which are hereby incorporated by reference in their entirety. Background technique [0003] Carbon particles containing graphite and graphene are used in a wide range of applications from automotive tire additives, to lubricants, to electronic device materials. Some of the properties that enable its use in such a wide range of applications are high surface area combined with high electrical and thermal conductivity. [0004] Naturally occurring graphene and graphite materials are mined and processed for use in different applications. Naturally occurring graphite and graphene materials contain high concentratio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J37/32
CPCC01B32/00C01B32/15C01B32/152C01B32/182C01B32/19H01J37/32192H01J37/3244H01J37/32532H01J2237/334C01B2204/04C01B2204/22C01B2204/32C01P2006/12C01P2006/40C01P2004/50C01P2004/51
Inventor B.H.安泽尔莫D.库克H-A.格泽尔巴施S.辛格M.W.斯托维尔D.坦纳
Owner 利腾股份有限公司
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