Tsinghua University

Guohua Luo

Yi Liu

Hao Yu

Yao M Wang

Yao Wang

Fei Wei

Weizhong Qian

Zhifei Li

Yong Jin

Zhanwen Wang

The present application provides multistage and multilayer reactors useful for the efficient and continuous production of carbon nanotubes and methods of using the apparatus in the preparation of carbon nanotubes. In one aspect, the multistage reactors include an array of interconnected fluidized-bed reactors. The multilayer reactors include a plurality of reaction zones.

Multistage reactors for continuous production of carbon nanotubes

The present invention relates to a method for continuous production of carbon nanotubes in a nano-agglomerate fluidized bed, which comprises the following steps: loading transition metal compounds on a support, obtaining supported nanosized metal catalysts by reducing or dissociating, catalytically decomposing a carbon-source gas, and growing carbon nanotubes on the catalyst support by chemical vapor deposition of carbon atoms. The carbon nanotubes are 4&#x2dc;100 nm in diameter and 0.5&#x2dc;1000 &#x3bc;m in length. The carbon nanotube agglomerates, ranged between 1&#x2dc;1000 &#x3bc;m, are smoothly fluidized under 0.005 to 2 m/s superficial gas velocity and 20&#x2dc;800 kg/mbed density in the fluidized-bed reactor. The apparatus is simple and easy to operate, has a high reaction rate, and it can be used to produce carbon nanotubes with high degree of crystallization, high purity, and high yield.

Continuous mass production of carbon nanotubes in a nano-agglomerate fluidized-bed and the reactor

Growing community of inventors

Beijing, China

Guohua Luo