TY - JOUR
AU1 - Xin, Feng
AU2 - Ma, Siming
AU3 - Yang, Jianping
AU4 - Zhao, Yongchun
AU5 - Zhang, Junying
AU6 - Zheng, Chuguang
AB - Reduction of mercury emission from coal combustion is a serious task for public health and environmental societies. Herein, Ce-doped TiO2 (Ce/TiO2) catalyst coupling with a novel optical fiber monolith reactor was applied to efficiently remove elemental mercury (Hg0) from coal-fired flue gas. Under the optimal operation condition (i.e., 1.5 mW/cm2 UV light, 90 °C), above 95% of Hg0 removal efficiency was attained over the optical fiber monolith reactor coating with 3.40 g/m2 Ce/TiO2 catalyst. The effects of flue gas compositions on Hg0 removal performance were clarified systematically. Gaseous O2 replenished the surface oxygen, hence maintaining the production of free radicals and promoting the removal of Hg0. SO2, HCl, and NO inhibited Hg0 removal in the absence of O2 due to the competitive adsorption and consumption of free radicals. However, SO2 and HCl significantly enhanced Hg0 removal with the participation of O2, while NO exhibited obviously inhibitory effect even with the assistance of O2. H2O also decreased the Hg0 oxidation capacity owing to the competitive adsorption and reduction of HgO. The optical fiber monolith reactor exhibited much superior Hg0 removal capacity than the powder reactor. Utilization of Ce/TiO2 catalyst coupling with an optical fiber monolith reactor provides a cost-effective method for removing Hg0 from coal-fired flue gas.
TI - Photocatalytic removal of elemental mercury via Ce-doped TiO2 catalyst coupling with a novel optical fiber monolith reactor
JF - Environmental Science and Pollution Research
DO - 10.1007/s11356-020-08477-x
DA - 2020-06-08
UR - https://www.deepdyve.com/lp/springer-journals/photocatalytic-removal-of-elemental-mercury-via-ce-doped-tio2-catalyst-sYmXmTA3DF
SP - 21281
EP - 21291
VL - 27
IS - 17
DP - DeepDyve
ER -