Supported catalyst, carbon nanotube assembly, and preparation method therefor
AssigneeLG Chem, Ltd.
InventorsKyungYeon KANG, Dongchul LEE, SungJin KIM, JaeKeun YOON, Seungyong LEE, Jinmyung CHA
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Abstract
The present invention relates to an impregnated supported catalyst, a carbon nanotube aggregate, and a method for producing the carbon nanotube aggregate. The carbon nanotube aggregate includes a four-component catalyst in which catalytic components and active components are supported on a granular support, and bundle type carbon nanotubes grown on the catalyst. The carbon nanotube aggregate has an average particle diameter of 100 to 800 μm, a bulk density of 80 to 250 kg/m3, and a spherical or potato-like shape.
Claims14
1-19. (canceled)
An impregnated catalyst comprising:
- an aluminum-based granular support coated with a catalyst composition coating,
- wherein the catalyst composition comprises a first catalytic component comprising cobalt (Co), a second catalytic component selected from the group consisting of iron (Fe), nickel (Ni), and a mixture thereof, a first active component comprising molybdenum (Mo), a second active component comprising vanadium (V) and a multi carboxylic acid,
- wherein the multi-carboxylic acid is used in an amount of 0.2 to 2.0 moles, assuming that the sum of the number of moles (p) of the first active component and the number of moles (q) of the second active component equals 1.
A method for producing an impregnated catalyst comprising:
- 1) sequentially blending a multi-carboxylic acid component and an aqueous solution of precursors of first and second catalytic components with an aqueous solution of precursors of first and second active components to obtain a transparent aqueous metal solution, and mixing an aluminum-based granular support with the transparent aqueous metal solution;
- and
- 2) drying the mixture under vacuum at 40 to 80° C. and calcining the dried mixture at 650 to 800° C. to obtain a catalyst for carbon nanotube production in which the surface and pores of the aluminum-based support are impregnated and coated with the catalytic components and the active components.
Dependencies are inferred from the claim text.