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基于CeO2/TiO2催化H2O2氧化低温脱硝的实验研究

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王琦, 陆强, 仇志超, 傅玉, 唐诗洁, 董长青, 杨勇平. 基于CeO2/TiO2催化H2O2氧化低温脱硝的实验研究[J]. 环境化学, 2018, 37(6): 1253-1263. doi: 10.7524/j.issn.0254-6108.2017090402
引用本文: 王琦, 陆强, 仇志超, 傅玉, 唐诗洁, 董长青, 杨勇平. 基于CeO2/TiO2催化H2O2氧化低温脱硝的实验研究[J]. 环境化学, 2018, 37(6): 1253-1263. doi: 10.7524/j.issn.0254-6108.2017090402
shu
WANG Qi, LU Qiang, QIU Zhichao, FU Yu, TANG Shijie, DONG Changqing, YANG Yongping. Low temperature H2O2 oxidized denitration catalyzed by CeO2/TiO2 catalyst[J]. Environmental Chemistry, 2018, 37(6): 1253-1263. doi: 10.7524/j.issn.0254-6108.2017090402
Citation: WANG Qi, LU Qiang, QIU Zhichao, FU Yu, TANG Shijie, DONG Changqing, YANG Yongping. Low temperature H2O2 oxidized denitration catalyzed by CeO2/TiO2 catalyst[J]. Environmental Chemistry, 2018, 37(6): 1253-1263. doi: 10.7524/j.issn.0254-6108.2017090402
shu

基于CeO2/TiO2催化H2O2氧化低温脱硝的实验研究

  • 1.

    华北电力大学生物质发电成套设备国家工程实验室, 北京, 102206

  • 基金项目:

    国家973项目（2015CB251501），北京市科技新星（Z171100001117064）和中央高校基本科研业务专项资金（2016YQ05，2015ZZD02）资助.

Low temperature H2O2 oxidized denitration catalyzed by CeO2/TiO2 catalyst

  • 1.

    National Engineering Laboratory for Biomass Power Generation Equipment, North China Electric Power University, Beijing, 102206, China

  • Fund Project: Supported by the National Basic Research Program of China(2015CB251501), Beijing Nova Program (Z171100001117064) and the Fundamental Research Funds for the Central Universities of China(2016YQ05, 2015ZZD02).

  • 摘要: 以H2O2为氧化剂对NO进行低温氧化脱硝，考察了非催化和纳米TiO2催化作用下的H2O2氧化低温脱硝性能；并以纳米TiO2为载体，采用等体积浸渍法掺杂过渡金属氧化物CeO2进行改性，制备了一系列CeO2/TiO2催化剂，探究了其催化作用下H2O2的氧化脱硝性能，并筛选获得了催化剂的最佳CeO2负载量；进一步针对最优催化剂，考察了不同烟气工况对催化剂活性的影响，并进行了XRD、H2-TPR以及XPS等表征分析.表征结果显示，CeO2的负载量会影响催化剂中晶格氧的含量，晶格氧相对含量的增加有利于氧化还原反应中的电子传递，这是促进H2O2活化分解的关键.实验结果表明，CeO2/TiO2催化剂能有效促进H2O2的活化分解实现低温脱硝，且CeO2负载量为3% wt时，催化活性最高；在烟温为160℃、[H2O2]/[NO]物质的量比为2以及空速为30000 h-1时，NO转化率最高可达76%.
    Abstract: H2O2 was employed as an oxidant for the low temperature oxidative denitration. Experiments were conducted to determine the denitration properties of H2O2 in non-catalyzed and nano TiO2-catalyzed processes. In addition, a series of CeO2/TiO2 catalysts were prepared by incipient wet impregnation method, with CeO2 as the active component and nano TiO2 as the carrier. H2O2-based oxidative denitration experiments were performed to determine the optimal CeO2 loading on the catalyst. Based on the optimal CeO2/TiO2 catalyst, the influence of flue gas conditions on catalyst activity was investigated. The characterization analyses of XRD, H2-TPR and XPS showed that the increase of CeO2 loading was favorable for the formation of lattice oxygen, which was beneficial for the electron transfer in the redox reactions. Therefore, increase of lattice oxygen was the key to promote the decomposition of H2O2. The experimental results indicated that the CeO2/TiO2 catalyst could effectively promote the activation and decomposition of H2O2 for low temperature denitration. The best catalytic performance was obtained at the CeO2 loading of 3% wt. Under the flue gas temperature of 160℃,[H2O2]/[NO] molar ratio of 2 and space velocity of 30000 h-1, the NO conversion the reached as high as 76%.
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  • 收稿日期:  2017-09-04
  • 刊出日期:  2018-06-15
王琦, 陆强, 仇志超, 傅玉, 唐诗洁, 董长青, 杨勇平. 基于CeO2/TiO2催化H2O2氧化低温脱硝的实验研究[J]. 环境化学, 2018, 37(6): 1253-1263. doi: 10.7524/j.issn.0254-6108.2017090402
引用本文: 王琦, 陆强, 仇志超, 傅玉, 唐诗洁, 董长青, 杨勇平. 基于CeO2/TiO2催化H2O2氧化低温脱硝的实验研究[J]. 环境化学, 2018, 37(6): 1253-1263. doi: 10.7524/j.issn.0254-6108.2017090402
shu
WANG Qi, LU Qiang, QIU Zhichao, FU Yu, TANG Shijie, DONG Changqing, YANG Yongping. Low temperature H2O2 oxidized denitration catalyzed by CeO2/TiO2 catalyst[J]. Environmental Chemistry, 2018, 37(6): 1253-1263. doi: 10.7524/j.issn.0254-6108.2017090402
Citation: WANG Qi, LU Qiang, QIU Zhichao, FU Yu, TANG Shijie, DONG Changqing, YANG Yongping. Low temperature H2O2 oxidized denitration catalyzed by CeO2/TiO2 catalyst[J]. Environmental Chemistry, 2018, 37(6): 1253-1263. doi: 10.7524/j.issn.0254-6108.2017090402
shu

基于CeO2/TiO2催化H2O2氧化低温脱硝的实验研究

  • 1. 华北电力大学生物质发电成套设备国家工程实验室, 北京, 102206
  • 收稿日期:  2017-09-04
基金项目:

国家973项目（2015CB251501），北京市科技新星（Z171100001117064）和中央高校基本科研业务专项资金（2016YQ05，2015ZZD02）资助.

摘要: 以H2O2为氧化剂对NO进行低温氧化脱硝，考察了非催化和纳米TiO2催化作用下的H2O2氧化低温脱硝性能；并以纳米TiO2为载体，采用等体积浸渍法掺杂过渡金属氧化物CeO2进行改性，制备了一系列CeO2/TiO2催化剂，探究了其催化作用下H2O2的氧化脱硝性能，并筛选获得了催化剂的最佳CeO2负载量；进一步针对最优催化剂，考察了不同烟气工况对催化剂活性的影响，并进行了XRD、H2-TPR以及XPS等表征分析.表征结果显示，CeO2的负载量会影响催化剂中晶格氧的含量，晶格氧相对含量的增加有利于氧化还原反应中的电子传递，这是促进H2O2活化分解的关键.实验结果表明，CeO2/TiO2催化剂能有效促进H2O2的活化分解实现低温脱硝，且CeO2负载量为3% wt时，催化活性最高；在烟温为160℃、[H2O2]/[NO]物质的量比为2以及空速为30000 h-1时，NO转化率最高可达76%.

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