| Mn-Ce-Co/TiO2催化剂低温脱硝活性研究 |
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| 引用本文： | 于国峰,韦彦斐,金瑞奔,朱虹,顾震宇,潘理黎.Mn-Ce-Co/TiO2催化剂低温脱硝活性研究[J].环境科学学报,2012,32(7):1743-1749. |
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| 作者姓名： | 于国峰 韦彦斐 金瑞奔 朱虹 顾震宇 潘理黎 |
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| 作者单位： | 1. 浙江工业大学环境工程系,杭州,310014
2. 浙江省环境保护科学设计研究院,杭州,310007 |
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| 基金项目： | 浙江省环境污染控制研究重点实验室资助项目 |
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| 摘 要： | 以纳米TiO2为载体,通过浸渍法制备一系列改性Mn-Ce/TiO2脱硝催化剂.通过实验考察不同元素组分催化剂的脱硝活性,同时探讨金属氧化物掺杂对提高催化剂低温脱硝活性的机理.活性测试结果显示,Co掺杂能最有效地提高Mn-Ce/TiO2催化剂在低温段的SCR脱硝活性,在n(Co):n(TiO2)=0.08～0.10、体积空速为35100h-1的条件下,催化剂在120℃时就能达到80%以上的NO去除率,140℃左右时的NO去除率接近100%.BET、XRD、TPR、TPD等表征测试结果表明,Co掺杂可改进Mn-Ce/TiO2催化剂的物化特性,增加催化剂表面的活性酸位点及活性氧数量,提高催化剂的氧化还原能力,从而提高Mn-Ce/TiO2催化剂低温SCR脱硝活性.
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| 关 键 词： | 选择性催化还原(SCR) 低温 活性 Mn-Ce-Co/TiO2催化剂 |
| 收稿时间： | 2011/9/28 0:00:00 |
| 修稿时间： | 2011/10/26 0:00:00 |
Study on the DeNOx activity of the Mn-Ce-Co/TiO2 catalyst at low temperature |
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| YU Guofeng,WEI Yanfei,JIN Ruiben,ZHU Hong,GU Zhenyu and PAN Lili.Study on the DeNOx activity of the Mn-Ce-Co/TiO2 catalyst at low temperature[J].Acta Scientiae Circumstantiae,2012,32(7):1743-1749. |
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| Authors: | YU Guofeng WEI Yanfei JIN Ruiben ZHU Hong GU Zhenyu and PAN Lili |
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| Affiliation: | Department of Environment Enginering, Zhejiang Unviersity of Technology, Hangzhou 310014;Zhejiang Envionmental Science and Design Institute, Hangzhou 310007;Zhejiang Envionmental Science and Design Institute, Hangzhou 310007;Zhejiang Envionmental Science and Design Institute, Hangzhou 310007;Zhejiang Envionmental Science and Design Institute, Hangzhou 310007;Department of Environment Enginering, Zhejiang Unviersity of Technology, Hangzhou 310014 |
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| Abstract: | A series of Mn-Ce/TiO2 catalysts was prepared by impregnation method with TiO2 as the carrier.Results of DeNOx activity tests indicated that Co doping could most significantly enhance the low-temperature SCR activity of the catalyst.It was showed that the most active Mn-Ce mixed-oxide catalyst with a Co loading of 0.08～0.10 yielded 80% NO conversion at 120 ℃ to 100% at 140 ℃ with the space velocity of 35100 h-1.These catalysts were characterized by surface area measurement(BET),x-ray diffraction(XRD) and temperature programmed desorption(TPD).The results showed that the surface acidity and the oxygen storage capacity of the Mn-Ce/TiO2 catalyst were improved by the introduction of Co.Temperature programmed reduction(TPR) results verified that the redox property of Mn-Ce/TiO2 was enhanced by Co doping.Therefore,Ce modification could effectively enhance the low-temperature SCR activity of Mn-Ce/TiO2. |
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| Keywords: | selective catalytic reduction (SCR) low-temperature activity Mn-Ce-Co/TiO2catalyst |
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