Nanoparticles of calcined ce-co substituted hydrotalcite: catalytic behavior for the reduction of n2o by nh3

Gabriela Carja1, Marinela Irimia1, M. Toyota2, I.M. Popa1

1 Technical University Gh. Asachi of Iasi, Faculty of Industrial Chemistry, Department of Physical Chemistry, Bd. D. Mangeron 71A, 6600 Iasi, Romania
2 Department of Chemical Engineering, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8550, Japan

Abstract


Nanoparticles of Co-Ce mixed oxides derived from substituted layered double hydroxides have been synthesized, characterized and tested as new catalysts in the process of catalytic reduction of N2O by NH3 in the presence of oxygen. The preliminary results show that high N2O conversions are obtained in a wide range of temperatures: at 673 K the N2O conversion is equal to nearly 50% and reaches a maximum value equal to almost 90% for temperatures higher than 750 K. In comparison, the catalytic sample derived from calcined not substituted hydrotalcite shows a maximum N2O conversion equal to 40%.

Keywords


Co-Ce substituted layered double hydroxides; mixed oxides; N2O reduction

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