催化学报

催化学报 ›› 2016, Vol. 37 ›› Issue (11): 1931-1940.DOI: 10.1016/S1872-2067(16)62514-7

• 论文 • 上一篇    下一篇

更低温度下和重复再生时NiO/SiO2催化剂上甲苯完全氧化反应

Sang Wook Hana, Myung-Geun Jeonga, Il Hee Kima, Hyun Ook Seoa, Young Dok Kima,b   

  1. a 韩国成均馆大学化学系, 水原 440-746, 韩国;
    b 韩国化学技术研究所(KRICT)纳米催化剂研究中心, 大田 305-600, 韩国
  • 收稿日期:2016-05-24 修回日期:2016-07-07 出版日期:2016-11-25 发布日期:2016-11-25
  • 通讯作者: Young Dok Kim,Tel:+82-31-299-4564; Fax:+82-31-290-7075; E-mail:ydkim91@skku.edu;Hyun Ook Seo,Tel:+82-31-299-4564; Fax:+82-31-290-7075; E-mail:seoho83@skku.edu

Use of NiO/SiO2 catalysts for toluene total oxidation: Catalytic reaction at lower temperatures and repeated regeneration

Sang Wook Hana, Myung-Geun Jeonga, Il Hee Kima, Hyun Ook Seoa, Young Dok Kima,b   

  1. a Department of Chemistry, Sungkyunkwan University, Suwon, 440-746, Korea;
    b Research Center for Nanocatalysts, Korea Research Institute of Chemical Technology (KRICT), Daejeon 305-600, Korea
  • Received:2016-05-24 Revised:2016-07-07 Online:2016-11-25 Published:2016-11-25
  • Contact: Young Dok Kim,Tel:+82-31-299-4564; Fax:+82-31-290-7075; E-mail:ydkim91@skku.edu;Hyun Ook Seo,Tel:+82-31-299-4564; Fax:+82-31-290-7075; E-mail:seoho83@skku.edu
  • Supported by:

    This work was supported by the National Research Council of Science and Technology (NST) through Degree and Research Center (DRC) Pro-gram (2015).

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摘要：

采用原子层沉积法将NiO沉积到粒径约为100 mm、平均孔径为14 nm的中孔SiO2颗粒的壳层（壳层厚度11 nm）区域，并分别在450和600℃进行热处理.将制得的这两种Ni/SiO2样品用于催化甲苯分子吸附及其氧化为CO2的反应中.结果发现，在450℃热处理的样品在甲苯吸附及其随后氧化为CO2的反应中表现出更高的活性；当将该样品暴露在160℃甲苯蒸气中，然后加热到450℃时，排放出CO2，而几乎没有甲苯脱附出来.这表明该催化剂可用于在200℃以下操作的、用于消除建筑物内有味气体的设备中，且该催化剂可以在450℃下经过热处理得到再生.

关键词: 多相催化, 化学吸附, 热脱附, 中孔材料, 甲苯氧化

Abstract:

We deposited NiO via atomic layer deposition on mesoporous SiO2 particles with diameters of sev-eral hundred micrometers and a mean mesopore size of ~14 nm. NiO was deposited within the shell region of mesoporous SiO2 particles with a shell thickness of ~11 mm. We annealed the as-prepared NiO/SiO2 at 450 and 600℃, respectively. These two samples were used as catalysts for the uptake of toluene molecules and their oxidative conversion to CO2. The sample annealed at 450℃ was generally more reactive in toluene uptake and its subsequent conversion to CO2. When the NiO/SiO2 annealed at 450℃ was exposed to toluene vapor at 160℃ and then heated to 450℃, CO2 was emitted with almost no toluene desorption. We suggest that our catalysts can be used as building blocks for odor removal devices that operate below 200℃. These catalysts can be regularly regenerated at ~450℃.

Key words: Heterogeneous catalysis, Chemisorption, Thermal desorption, Mesoporous material, Toluene oxidation