Zeon Corporation

Waseda University

Takayoshi Hongo

Suguru Noda

Zhongming Chen

Kosuke Kawabata

Soichiro Hachiya

A supported catalyst comprises: a support that is particulate; and a composite layer laminate formed outside the support and including two or more composite layers, wherein each of the composite layers includes a catalyst portion containing a catalyst and a metal compound portion containing a metal compound, the support contains 10 mass % or more of each of Al and Si, and a volume-average particle diameter of the support is 50 &#x3bc;m or more and 400 &#x3bc;m or less.

Supported catalyst and method of producing fibrous carbon nanostructures

The disclosed method includes a separation step wherein composite particles are transferred to a vicinity of an inlet of a fibrous carbon nanostructure path configured to recover fibrous carbon nanostructures by allowing the fibrous carbon nanostructures to pass therethrough, and a fluid flowing toward the inlet of the path and an external force including a component of a direction opposite to the direction in which the fluid flows are applied to the composite particles to separate the fibrous carbon nanostructures and a particulate ceramic support substrate; and a recovery step wherein the separated fibrous carbon nanostructures are transferred to an interior of the path for recovery by a flow of the fluid, with the separated substrate transferred away from the fibrous carbon nanostructure path for recovery, wherein, in the separation step, the external force applied to the substrate is greater than that applied to the fibrous carbon nanostructures.

Separation and recovery method

A method of producing fibrous carbon nanostructures uses a fluidized bed process, and comprises supplying a source gas to a reaction site in which a supported catalyst having a particulate carrier and a catalyst supported on a surface of the carrier is fluidizing, to form fibrous carbon nanostructures on the catalyst of the supported catalyst, wherein the source gas contains a double bond-containing hydrocarbon and carbon dioxide, and a content of the carbon dioxide is 0.3 vol % or more with respect to a total volume of the source gas.

Growing community of inventors

Tokyo, Japan

Takayoshi Hongo