Reaction Kinetics, Mechanisms and Catalysis

, Volume 127, Issue 2, pp 945–959 | Cite as

Purification of exhaust gases from gasoline engine using adsorption-catalytic systems. Part 1: trapping of hydrocarbons by Ag-modified ZSM-5

  • V. L. Temerev
  • A. A. VedyaginEmail author
  • K. N. Iost
  • L. V. Pirutko
  • S. V. Cherepanova
  • R. M. Kenzhin
  • V. O. Stoyanovskii
  • M. V. Trenikhin
  • D. A. Shlyapin


In the present work, adsorptive-catalytic properties and thermal stability of the systems based on ZSM-5 zeolite and γ-Al2O3, used as a binder, were studied. The zeolite was modified with silver, and the Ag loading used was 5 and 10 wt%. Characterization of the samples by a transmission electron microscopy has revealed that for the 5%Ag/ZSM-5 sample the predominant part of silver is represented by ion-exchanged forms. The 10%Ag/ZSM-5 sample contains also silver nanoparticles and clusters on the outer zeolite surface. As it was found by means of X-ray diffraction analysis, all these surface Ag species are roentgen-amorphous. Diffuse reflectance UV–vis spectroscopy confirms presence of the surface Ag clusters, which concentration increases after the high-temperature aging. The adsorption capacity of the samples was estimated using toluene as a model aromatic compound. The composition of the reaction mixture during the aging procedures was varied in order to elucidate the contribution of different silver sites to hydrocarbons sorption, their partial oxidation and oxidation of carbon monoxide.


Vehicle emissions Cold-start Hydrocarbon trapping Ag-ZSM-5 CO oxidation Prompt thermal aging procedure 



This study was supported by the Ministry of Science and High Education of Russian Federation (Project AAAA-A17-117041710086-6). The analysis of experimental results was partly carried out within the Governmental Program “Science” of Tomsk Polytechnic University (Project No. 4.5200.2017).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.


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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2019

Authors and Affiliations

  • V. L. Temerev
    • 1
  • A. A. Vedyagin
    • 2
    • 3
    Email author
  • K. N. Iost
    • 1
  • L. V. Pirutko
    • 2
  • S. V. Cherepanova
    • 2
    • 4
  • R. M. Kenzhin
    • 2
  • V. O. Stoyanovskii
    • 2
  • M. V. Trenikhin
    • 1
  • D. A. Shlyapin
    • 1
  1. 1.Center of New Chemical TechnologiesBoreskov Institute of Catalysis SB RASOmskRussian Federation
  2. 2.Boreskov Institute of Catalysis SB RASNovosibirskRussian Federation
  3. 3.National Research Tomsk Polytechnic UniversityTomskRussian Federation
  4. 4.National Research University-Novosibirsk State UniversityNovosibirskRussian Federation

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