The microwave-induced activation process was compared with
the conventional thermal method. The effects of microwave activation
(microwave power 350 W, radiation time 20min, phosphoric
acid/carbon 1:1) and thermal activation (temperature 600 ◦C, heating
rate 10 ◦C/min, phosphoric acid/carbon 1:1, activation time 30
and 60 min) were summarized in Table 1.