Abstract:A series of HZSM-5 zeolite loading MnOx were prepared by impregnation method to investigate their removal characteristics of Hg0 in experimental flue gas, and characterized by X-ray diffraction (XRD) and surface area measurement (BET) methods. These experimental results suggested that HZSM-5 had good activity on removing Hg0 in the presence of 6% O2. After loading active components MnOx on HZSM-5 zeolite, the removal efficiency of Hg0 could be increased, and the best loading amount was 10%. Rising reaction temperature appropriately could enhance the removal efficiency of Hg0, and the optimum temperature was 300℃. O2 in flue gas could promote the oxidation of Hg0 while NO and SO2 inhibited the mercury oxidation due to the competition of active sites on MnOx/HZSM-5 sorbents with Hg0. Additionally, it was verified that Hg0 on MnOx/HZSM-5 adsorbents was mainly oxidized into HgO, which agreed with the Mars-Maessen mechanism to a certain extent.
陈玲, 李彩亭, 高招, 樊小鹏, 彭敦亮, 崔华飞. MnOx/HZSM-5去除烟气中元素态汞的实验研究[J]. 中国环境科学, 2010, 30(8): 1026-1031.
CHEN Ling, LI Cai-Ting, GAO Zhao, FAN Xiao-Peng, PENG Dun-Liang, CUI Hua-Fei. Experimental study of removing elemental mercury from flue gas by MnOx/HZSM-5. CHINA ENVIRONMENTAL SCIENCECE, 2010, 30(8): 1026-1031.