摘要
采用共沉淀法分别制备Ti、Co、Cu掺杂Fe3O4的非均相类Fenton催化剂,在小型实验台架上进行非均相类Fenton反应脱汞的实验研究。利用X射线衍射(XRD)、扫描电子显微镜(SEM)对催化剂的晶体结构和形貌进行了表征。实验考察了掺杂前Fe3O4和掺杂后Fe2.59Ti0.41O4、Fe2.52Co0.48O4、Fe2.44Cu0.56O4催化剂的类Fenton脱汞性能,并通过电子顺磁共振技术(EPR)分析了非均相类Fenton脱汞的机理。结果表明:Ti、Cu掺杂后的催化剂具有较高的催化活性,-OH的强氧化作用是类Fenton脱汞的主要原因。
A series of heterogeneous Fenton-like catalysts, un-doped and doped Fe3O4 with Ti, Co, and Cu was prepared by co-precipitation method and used for the removal of elemental mercury in flue gas. The evaluation experiments were carried out in a laboratory scale reactor. The crystal structure and morphology of these catalysts were characterized by X-ray diffraction（XRD） and scanning electron microscope（SEM）. The effect of H2O2 concentration and acid gases such as SO2 and NO on removal efficiency of mercury were systematically examined. The electron paramagnetic resonance（EPR） was employed to study the mechanism of mercury removal by heterogeneous Fenton-like catalytic reaction. The results showed that the catalysts doped with Ti and Cu show high activity for the removal of elemental mercury, and this high activity could be contributed to produce more OH radicals by these heterogeneous Fenton-like catalysts during Hg0 removal reactions.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2015年第4期1324-1330,共7页
CIESC Journal
基金
国家自然科学基金项目(51376073
51306046)
煤燃烧国家重点实验室自主研发项目(FSKLCCB1503)~~
