In this paper

Mn_2O_3-loaded activated coke was used to remove NO efficiently at low microwave power(200 W). The experimental results show that

nitric acid oxidation treatment and loading of Mn_2O_3 increased the content of oxygen-containing functional groups of the activated coke such as carbonyl and carboxyl groups. Microwave irradiation significantly increased the specific surface area and micropore volume of the activated coke

and provides a rich surface for reactive gas adsorption on the activated coke. It was conducive to the removal of NO. After the nitric acid treatment

the denitration efficiency of Mn_2O_3-loaded activated coke could stably reach higher than 85%. The loading of Mn_2O_3 increased the intensity of microwave-induced discharge and the plasma concentration

so that more stable NO molecules were excited

which promoted the occurrence of C-NO reduction reactions.