Catalyst composition for preparing carbon nanotube

A catalyst composition for preparing carbon nanotube represented by following formula.

• [COxVyM1z]pM2q
• wherein
• Co represents catalytic metal of cobalt, its oxide or its derivative;
• V represents catalytic metal of vanadium, its oxide or its derivative;
• M1 represents at least one catalytic transition metal selected from Al, Fe, Ni, W, Cr, Mn, Sn, Cu, Y, Zr, Ti, Mo or Si, its oxide or its derivative;
• M2 represents inactive porous support selected from Mg or Si, its oxide or its derivative;
• p and q represent mole fraction of catalytic metal and inactive porous support, respectively.
• p+q=1, 0.05≦p≦0.95, 0.05≦q≦0.95,
• x, y and z represent mole fraction of Co, V and M1, respectively.
• x+y+z=1, 0.03≦x≦0.75, 0.02≦y≦0.75, 0.01≦z≦0.95.