2011•Kinetics and CatalysisRequires access
Selective oxidation of carbon monoxide in hydrogen-containing gas on CuO-CeO2/Al2O3 catalysts prepared by surface self-propagating thermal synthesis
Tatyana N. Afonasenko, D. A. Shlyapin, Н. Н. Леонтьева, T. I. Gulyaeva, K. S. Buyal’skaya, Mikhail V. Trenikhin, Pavel G. Tsyrulnikov
Open publisher page 8 citations
Abstract
The CuO-CeO 2 /Al 2 O 3 catalysts for the selective oxidation of CO in hydrogen-containing mixtures were prepared by surface self-propagating thermal synthesis (SSTS) with the use of cerium nitrate Ce(NO 3 ) 3 , the ammonia complex of copper acetate [Cu(NH 3 ) 4 ](CH 3 COO) 2 , and citric acid C 6 H 8 O 7 as a fuel additive. The effect of the C 6 H 8 O 7 /Ce(NO 3 ) 3 molar ratio on the catalyst activity and selectivity for oxygen was studied. The catalyst samples were studied by X-ray diffraction (XRD) analysis, temperature-programmed reduction (TPR-H 2 ), IR spectroscopy of adsorbed CO, and transmission electron microscopy (TEM). It was found that an increase in the C 6 H 8 O 7 /Ce(NO 3 ) 3 ratio resulted in an increase in the degree of dispersion of the resulting CeO 2 phase. The greatest amount of dispersed CuO particles, which are responsible for catalytic activity in the oxidation of CO, was formed at C 6 H 8 O 7 /Ce(NO 3 ) 3 = 1.