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Agreenprocesshasbeensuccessfullydevelopedtomass-producecarbonnano-tubes(CNTs)usingelectric-arc-furnace(EAF)dustsasthecatalyst. The CNTs were prepared by a thermal CVD process with the gas mixture acetylene and nitrogen own directly on the EAF dust thatwas rstly treated by a reduction period. Preliminary experimental results illustrated that CNTs were easily synthesized in large quantity and incurlyshapes.Thecharacteristics ofas-grownCNTswereevaluatedbytransmissionelectronmicroscopyandRamanspectrometry tobeofgoodgraphitic structure. This production method is extremely meaningful both environmentally and industry-wise.(Received September 14, 2005; Accepted December 2, 2005; Published February 15, 2006)Keywords: carbon nanotube, thermal chemical vapour deposition, electric arc furnace dust

Growth of Carbon Nano-Tubes from Electric-Arc-Furnace Dust Directly