Preparation of Elm Char/Nano-TiO_2 Photocatalyst and Experimental Studies on the Removal of Elemental Mercury

The sol-gel method was used to prepare elm char/TiO2 photocatalytic materials.The characteristic of elemental mercury adsorption by the elm char/TiO2 was evaluated on a fixed bed reactor in N2 atmosphere.The effects of ultraviolet light(UV),oxygen and water vapor on Hg0-removal efficiency were discussed.The results show that the elm char/TiO2 performed a high removal efficiency to mercury under UV,the oxygen and water vapor are positive to mercury removal.The mercury removal efficiency can reach 86% with 10% oxygen in the atmosphere under UV light.