Thermal behaviors of deactivation catalysts for synthesizing 2, 3, 5-trimethylhydroquinone

摘要

The thermal behaviors of the deposits on supported noble metal catalysts for synthesizing 2, 3, 5-trimethylhydroquinone by DSC were studied. The results show that the supported Pd catalysts have two exothermic peaks at around 312 ℃ and 435 ℃ in the DSC thermograms, respectively, while the supported Pt catalysts have one exothermic peak at approximately 345 ℃. Therefore, it is supposed that the adsorptive states of deposits on supported Pt catalysts and supported Pd catalysts are different, which may be one reason leading to the stability difference between supported Pt catalysts and supported Pd catalysts.