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A Comparative Study of M/ZSM-5 (M = Pd, Ag, Cu, Ni) Catalysts in the Selective Reduction of Nitrogen (II) Oxide by Ammonia

Authors(4) :-Marzieh Hamidzadeh, Mitra Ghassemzadeh, Aliakbar Tarlani, Saeed Sahebdel Far

The improvement of H-ZSM-5 catalyst for NO removal from stack of nitric acid unit was studied in this research. Selective catalytic reduction of NO was investigated on Pd, Ag, Cu and Ni impregnated on ZSM-5 in the presence of excess of oxygen. The new prepared catalysts were characterized by XRD, FTIR, H2-TPR and N2 adsorption-desorption methods. Successively, NOconversion increased with the reaction temperature transmission through a maximum, and then decreased at higher temperatures, because of the combustion of the ammonia on Pd/ ZSM-5and Cu/ ZSM-5 catalysts. The apparent activation energies in NO removal reaction have been determined for the prepared catalysts and it changes from 23 to 48 kJ/mol. In synthesis catalysts, partial dealumination were confirmed by XRD results. The results exhibited that the Cu/ZSM-5 and Pd/ZSM-5 catalysts had acceptable activity between 200 to 400 °C and under 250°C, respectively. It is found that the NOx removal efficiency does not obey from the same pattern by rising temperature in all of these catalysts.
Marzieh Hamidzadeh, Mitra Ghassemzadeh, Aliakbar Tarlani, Saeed Sahebdel Far
ZSM-5; Selective catalytic reduction; Nitrogen oxides; cation effect
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Publication Details
  Published in : Volume 1 | Issue 4 | September-October 2015
  Date of Publication : 2015-10-25
License:  This work is licensed under a Creative Commons Attribution 4.0 International License.
Page(s) : 06-11
Manuscript Number : IJSRST151333
Publisher : Technoscience Academy
PRINT ISSN : 2395-6011
ONLINE ISSN : 2395-602X
Cite This Article :
Marzieh Hamidzadeh, Mitra Ghassemzadeh, Aliakbar Tarlani, Saeed Sahebdel Far, "A Comparative Study of M/ZSM-5 (M = Pd, Ag, Cu, Ni) Catalysts in the Selective Reduction of Nitrogen (II) Oxide by Ammonia", International Journal of Scientific Research in Science and Technology(IJSRST), Print ISSN : 2395-6011, Online ISSN : 2395-602X, Volume 1, Issue 4, pp.06-11, September-October-2015
URL : http://ijsrst.com/IJSRST151333