摘要
以γ-Al_2O_3为掺杂,通过掺杂Mn、Ce活性物质制备复合催化剂去除模拟烟气中的Hg0,考察了Mn和Ce负载量、催化剂制备煅烧温度、反应温度以及模拟烟气中O_2和SO_2体积分数对于Hg0去除率的影响。结果表明,负载Mn、Ce活性组分后,复合催化剂对燃煤烟气Hg^0的去除率明显高于γ-Al_2O_3。当Mn、Ce负载量分别为0.10、0.02时(以Mn、Ce与Al的摩尔比计)时,制得的催化剂Mn0.10-Ce0.02/γ-Al_2O_3活性最好,催化剂最佳煅烧温度为400℃,最佳反应温度为150℃。常规燃煤烟气条件下的O_2体积分数能够满足Hg^0的有效氧化,烟气中的SO_2会严重抑制Hg^0的氧化。
Theγ-Al2O3 was applied as carrier for doping active substances Mn and Ce to prepared composite catalyst to remove the Hg 0 in simulated flue gas.The effect of Mn and Ce loading content,calcination temperature,demercuration temperature,and O2 and SO2 volume fraction on Hg 0 removal efficiency was investigated.The results showed that after loading active substances Mn and Ce,the catalytic capacity was greatly improved and the Hg 0 remove rate increased significantly.When the Mn and Ce loading content was 0.10 and 0.02(measured in molar ratio of Mn,Ce to Al),the obtained catalyst Mn 0.10-Ce 0.02/γ-Al2O3 achieved the best catalytic capacity,and the best calcination temperature and demercuration temperature was 400 and 150℃,respectively.The concentration of O2 in real flue gas was high enough for the effective oxidation of Hg0,while the SO2 in real flue gas could seriously inhibit the oxidation of Hg0.
作者
谢亚婷
胡将军
XIE Yating;HU Jiangjun(School of Resource and Environmental Sciences,Wuhan University,Wuhan Hubei 430072)
出处
《环境污染与防治》
CAS
CSCD
北大核心
2018年第3期306-310,共5页
Environmental Pollution & Control
