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We study the Kondo effect in a CNT(left lead)-CNT(QD)-CNT(right lead)structure. Here CNT is a single-wall metallic carbon nanotube, for which 1) thevalence and conduction bands of electrons with zero orbital angular momentum($m=0$) coalesc at the two valley points ${\bf{K}}$ and ${\bf{K}}'$ of thefirst Brillouin zone and 2) the energy spectrum of electrons with $m \ne 0$ hasa gap whose size is proportional to $|m|$. Following adsorption of hydrogenatoms and application of an appropriately designed gate potential, electronenergy levels in the CNT(QD) are tunable to have: 1) two-fold spin degeneracy;2) two-fold isospin (valley) degeneracy; 3) three-fold orbital degeneracy$m=0,\pm1$. As a result, an SU(12) Kondo effect is realized with remarkablyhigh Kondo temperature. Unlike the SU(2) case, the low temperature conductanceand magnetic susceptibility have a peak at finite temperature. Moreover, themagnetic susceptibilities for parallel and perpendicular magnetic fields (WRTthe tube axis) display anisotropy with a universal ratio$\chi_{\rm{imp}}^\parallel / \chi_{\rm{imp}}^\perp=\eta$ that depends only onthe electron's orbital and spin $g$ factors.

SU(12) Kondo Effect in Carbon Nanotube Quantum Dot