Process for the synthesis of carbon nanotubes
AssigneeReliance Industries Limited
InventorsGopal Krishna Goswami, Swanand Dilip Patil, Sreekumar Thaliyil Veedu, Vijai Shankar Balachandran
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Abstract
The present disclosure relates to a process for the synthesis of highly crystalline carbon nanotubes (CNTs). Processes known in the art employ post-synthesis processes such as oxidation or hydrothermal treatment to produce CNTs with high crystallinity. The present disclosure produces highly crystalline CNTs at a low growth temperature and without hydrogen flow condition and without employing any post-production process. The process disclosed in the present disclosure produces CNTs having a crystallinity greater than 5 which makes them suitable for various industrial applications.
Claims7
A process for the synthesis of carbon nanotubes, said process comprising the following steps:
- a) introducing in a reactor a feedstock comprising:
- i. at least one carbon source selected from the group consisting of C1 to C7 hydrocarbons and C1 to C7 alcohols;
- and
- ii. at least one catalyst composition comprising at least one element selected from the group consisting of iron, nickel, and cobalt;
- b) injecting a carrier gas in said reactor;
- wherein said carrier gas is selected from the group consisting of nitrogen and argon;
- and
- c) evaporating and decomposing said feedstock by heating, using a furnace, to form said carbon nanotubes, which are deposited on a substrate positioned in said reactor at a location distant from the furnace for easy recovery of said carbon nanotubes films where the temperature is less than 200° C.,
- wherein the evaporation of said feedstock is performed at a temperature ranging from 400 ° C. to 600° C.,
- wherein the decomposition of said feedstock is performed at a temperature ranging from 800 ° C. to 1300° C., and
- wherein the crystallinity of said carbon nanotubes is greater than 5.
Dependencies are inferred from the claim text.