Patent ID: 11932541
Assignee: NGEE ANN POLYTECHNIC
Field: Surface technology, coating (Chemistry)
Classification: CPC B  C  H  Y | IPC B  C  H

Claim 0:
1. A process for synthesizing multiwall carbon nanotubes comprising:
depolymerizing high molecular polymeric wastes to obtain a carbon-containing feedstock;
pre-treating an array of catalytic materials consisting of 304 type stainless steel with an acid to reduce chromium content in the array of catalytic materials to less than 12%;
introducing a reducing gas into a catalytic reactor containing the array of catalytic materials;
heating the array of catalytic materials in the catalytic reactor by induction heating in the presence of the reducing gas to activate active sites on surfaces of the array of catalytic materials;
feeding the carbon-containing feedstock into the catalytic reactor containing the array of catalytic materials, wherein the array of catalytic materials is arranged in a horizontally stacked manner having a space between any two adjacent catalytic materials sufficient to allow multiwall carbon nanotubes to grow and deposit on surfaces of the catalytic materials;
heating the array of catalytic materials in the presence of the carbon-containing feedstock by induction heating to form multiwall carbon nanotubes on the surfaces of the catalytic materials; and
removing the multiwall carbon nanotubes from the surfaces of the array of catalytic materials.