中文摘要：

采用溶胶一凝胶法合成了CuO-CeO2/TiO2（CuCeTi）催化剂,并采用BET,XRD,XPS等分析手段对催化剂进行了表征。在固定床实验装置上研究了低温SCR气氛下催化剂对单质汞（Hg^0）的催化氧化。结果表明;SCR气氛（NO＋NH3＋4%O2）下CuCeTi催化剂可以促进Hg^0的氧化。200℃,NO与NH3体积分数均为0.1%,空塔气速（GHSV）高达54000 h^-1时,CuCeTi催化剂上Hg^0的氧化效率仍可高达99%;SCR气氛可以抑制CuCeTi催化剂上Hg^0的氧化,且NO与NH3的浓度越高,抑制作用越强,但这种抑制作用随GHSV的降低可以得到缓解甚至消除。CuCeTi催化剂在SCR气氛下具有良好的汞氧化活性与稳定性,应用该SCR催化剂有望实现燃煤烟气中NOx与Hg^0的协同控制。

英文摘要：

CuO-CeO2/TiO2（CuCeTi） catalyst prepared by a sol-gel method was employed for elemental mercury（Hg^0） oxidation under low temperature selective catalytic reduction atmosphere.The catalyst was characterized by BET,XRD,and XPS analysis,and its Hg^0 oxidation performance was tested on a bench-scale fix-bed reactor.The CuCeTi catalyst was found to be active for promoting Hg^0 oxidation under SCR atmosphere（NO＋NH3＋4%O2）.Hg^0 oxidation efficiency as high as 99.0% was observed on the CuCeTicatalyst at 200℃,when both NO and NH3 volume concentrations were 0.1%,even the gas hourly space velocity（GHSV） of 54000 h^-1 was extremely high.SCR atmosphere could inhibit Hg^0 oxidation over the CuCeTi catalyst,and higher NO and NH3 concentrations resulted in more adverse effect.However,theinhibitive effect of SCR atmosphere was alleviated even scavenged by lowering GHSV.Moreover,Hg^0 oxidation performance of the CuCeTi catalyst was very stable.Therefore,it is promising to use the CuCeTi catalyst for simultaneous control of NOx and Hg^0 from coal combustion.