Catalytic Removal of Methane Over Cobalt Chromite (CoCr2O4) Nanospinels for CNG Vehicles

Authors

  • A. Khodadadi Catalysis, Nanostructured Materials Laboratory, School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, I. R. Iran
  • F. Nazari Research Institute of Applied Science, ACECR, Tehran, I. R. Iran
  • Z. Bahrami Faculty of Nanotechnology, Semnan University, Semnan, I. R. Iran
  • Z. Kazemizadeh Research Institute of Applied Science, ACECR, Tehran, I. R. Iran
Abstract:

Cobalt chromite (CoCr2O4) with normal spinel structure, shows catalytic activity for oxidation of unburned methane in the natural gas vehilcles (NGV). In this study, CoCr2O4 nanoparticles were synthesized through a conventional co-precipitation technique and investigated for the catalytic combustion of methane. Cobalt nitrate hexahydrate, chromium nitrate nonahydrate and ammonia solution (25%) were used as the starting materials. The obtained results show that the CoCr2O4 nanospinels were produced as single phase with an average diameter between 25-50 nm.Characterization studies by X- ray diffraction (XRD), N2 adsorption/desorption(BET), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), temperature program oxidation (TPO) and O2- temperature programmed desorption (O2-TPD) were carried out.The specific surface area (SBET) of the synthesized nanoparticles was measured using multiple point Brunauer–Emmett–Teller (BET) method.40 m2.g-1 was obtained for CoCr2O4 nanoparticles. The results revealed that cobalt chromite nanoparticles have significant capability for methane conversion at 435oC. 

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Journal title

volume 11  issue 4

pages  275- 280

publication date 2015-12-01

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