TY - JOUR
ID - 10.1016/j.jes.2020.05.029
TI - Simultaneous removal of gaseous CO and elemental mercury over Cu-Co modified activated coke at low temperature
AU - Fengyu Gao
AU - Hao Yan
AU - Xiaolong Tang
AU - Honghong Yi
AU - Shunzheng Zhao
AU - Qingjun Yu
AU - Shuquan Ni
VL - 33
IS - 3
PB -
SP - 36
EP - 48
PY -
JF - Journal of Environmental Sciences
JA - J. Environ. Sci.
UR - http://www.jesc.ac.cn/jesc_en/ch/reader/view_abstract.aspx?file_no=S1001074220302485&flag=1
KW - Corresponding author.;Synergetic catalysis;Cu-Co oxides;Carbon monoxide;Element mercury;Activated coke
AB - Cu-Co multiple-oxides modified on HNO3-pretreated activated coke (ACN) were optimized for the simultaneous removal of gaseous CO and elemental mercury (Hg0) at low temperature (< 200 °C). It was found that 2%CuOx-10%CoOx/ACN catalyst calcined at 400°C resulted in the coexistence of complex oxides including CuO, Cu2O, Co3O4, Co2O3 and CoO phases, which might be good for the simultaneous catalytic oxidation of CO by Co-species and removal of Hg0 by Cu-species, benefiting from the synergistic catalysis during the electro-interaction between Co and Cu cations (CoO ⇌ Co3O4 and Cu2O ⇌ CuO). The catalysis removal of CO oxidation was obviously depended on the reaction temperature obtaining 94.7% at 200 °C, while no obvious promoting effect on the Hg0 removal (68.3%-78.7%). These materials were very substitute for the removal of CO and Hg° from the flue gas with the conditions of 8–20 vol.% O2 and flue-gas temperature below 200 °C. The removal of Hg° followed the combination processes of adsorption and catalytic oxidation reaction via Langmuir-Hinshelwood mechanism, while the catalysis of CO abided by the Mars-van Krevelen mechanism with lattice oxygen species.
ER -