Kinetics of the thermal decomposition of diethyldithiocarbamato tellurium (IV)

The thermal decomposition of diethyldithiocarbamato tellurium (IV) (TDEC) is investigated by simultaneous TG/DTG/DSC-FTIR method in nitrogen atmosphere. Experimental results indicate that the TDEC decomposition goes through two stages, namely, the initial elimination of C2H5–Ndouble bond; length as m-dashCdouble bond; length as m-dashS, S and C2H5with a molar ratio of 1:3:3, and the subsequent loss of CS2, N(C2H5)2 and C2H5–Ndouble bond; length as m-dashCdouble bond; length as m-dashS with a molar ratio of 1:1:2. The trustworthy model-free kinetic approach has been used for characterization of the nonisothermal decomposition of TDEC. Our study shows that the activation energy for the two stages decomposition of TDEC greatly depends on the extent of conversion, implicating that the pyrolysis of TDEC features multi-step characteristics.