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助剂Fe添加对柱状MnO_x/PG-AC催化剂低温选择性催化还原(SCR)性能影响 被引量：15

Iron oxides as addtive over MnO_x/PG-AC catalysts for low temperature selective catalytic reduction
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摘要 采用等体积浸渍法制备Mn Ox/PG-AC、Mn Ox-Fe Oy/PG-AC催化剂,并通过X射线衍射(XRD)、X射线光电能谱(XPS)及场发射扫描(FESEM)等表征手段分析了Fe的掺杂对催化剂低温脱硝活性的影响.分析表明,助剂Fe的加入促进活性组分锰氧化物具有更好的分散性,为催化剂提供了更多的催化活性位点,同时助剂Fe的掺杂明显调控了活性组分Mn4+/Mn3+的价态比.一定量Fe的掺杂显著提高了催化剂的低温选择性催化还原(SCR)性能.当Fe/Mn的物质的量之比为0.8时,Mn Ox-Fe Mn Ox/PG-AC and Mn Ox-Fe Oy/ PG-AC catalysts were loaded with manganese oxides and iron oxides by means of pore volume impregnation. Influence of Fe on the Mn Ox/ PG-AC catalysts at low temperature SCR were characterized by XRD,XPS and FESEM. The results showed that Fe had effectively changed the morphology of Mn Ox/ PG-AC catalysts surface. It not only led to uniform dispersion of active manganese species on the PG-AC support,but also a distinct improvement in surface Mn4 ＋/ Mn3 ＋ratio. Obviously,the addition of iron content effectively enhanced the catalysts＇ SCR activity and Mn Ox-Fe Oy/ PG-AC /300 ℃ catalyst had the best SCR activity at low temperatures when the molar ratio of Fe/Mn = 0. 8.
作者 张先龙 郭勇 张恒建 解城华 吴雪平
机构地区 合肥工业大学化学与化工学院 合肥晨晰环保工程有限公司
出处 《环境化学》 CAS CSCD 北大核心 2015年第8期1535-1544,共10页 Environmental Chemistry
基金 国家自然科学基金(40902020 51002042) 高等学校博士学科点专项科研新教师基金(120090111120019) 中央高校基本科研业务费专项基金(2011HGQL1003)资助
关键词 MN Fe 凹凸棒石-活性炭 低温 SCR Mn Fe PG-AC low temperature SCR
分类号 X701 [环境科学与工程—环境工程] O643.3 [理学—物理化学]
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参考文献27

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环境化学
2015年 第8期

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