Experimental Study on the Elemental Mercury Removal Performance and Regeneration Ability of CoOx–FeOx-Modified ZSM-5 Adsorbents

Herein, a series of Co-Fe mixed oxide modified ZSM-5 adsorbents were synthesized using the ultrasonic-assisted impregnation method for capture elemental mercury. In comparison with other samples, Co4Fe1-ZSM-5 produced relatively better performance, removal efficiency around 96.6% Hg0 and adsorption capacity 901.63 ug/mg achieved at 120 °C. The interaction between CoOx FeOx improved reducibility oxygen species, thus promoting oxidation Hg0. Among variety gas components, O2 NO exerted positive effect on Hg0, which its to certain extent. By contrast, SO2 caused an adverse could be reversed some degree by introduction 5% O2. After five cycles, mercury remained above 90%, suggesting excellent recyclability. Finally, XPS analysis was conducted reveal that Mars–Maessen mechanisms are dominant in process adsorption.