陈万苗,刘庆航,杨昌涛,瞿赞,杨士建,谢江坤,晏乃强

• 1:上海交通大学环境科学与工程学院

摘要(Abstract)：

为减少烟气氨法选择性还原催化脱硝(NH3-SCR)过程氨的逃逸问题,提出了在SCR催化单元尾部增设对氨具有高效分解作用的改性SCR催化剂的方法。分别考察了Cu及Ru等金属元素对W/V/Ti型SCR催化剂的改性效果。结果表明,Cu、Ru两种金属元素改性后的催化剂对逃逸氨均有较好的脱硝还原效果及强化氨的催化分解作用。对氨分解产物分析表明,Cu改性催化剂对氨的分解产物中NOx转化率较高,而Ru改性SCR催化剂不仅具有非常高的氨催化氧化活性,同时其分解产物对N2的选择性能够达到90%以上。另外,考察了温度、催化剂预硫化处理、NO等因素对逃逸氨的分解作用的影响,催化剂在300~400℃具有最好的活性,预硫化对氨的分解作用具有抑制作用,尤其对Cu系催化剂。Ru/SCR催化剂具有很好的抗硫性能,经过预硫化处理后,在NO存在的条件下,NH3去除率能够达到80%以上,在逃逸氨控制方面具有应用前景。

关键词(KeyWords)： 逃逸氨;选择性还原脱硝(SCR);Cu系催化剂;Ru;催化氧化

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助课题(21077073);; “863”计划资助课题(2011AA060801)

作者(Author): 陈万苗,刘庆航,杨昌涛,瞿赞,杨士建,谢江坤,晏乃强

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