Chinese Journal of Catalysis ›› 2016, Vol. 37 ›› Issue (11): 1931-1940.DOI: 10.1016/S1872-2067(16)62514-7

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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).

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