III International Conference

MECHANOCHEMISTRY AND MECHANO-CATALYTIC PROCESSES INENVIRONMENTAL PROTECTIONPP-III-60Zazhigalov V.A., Khalameida S.V., Litvin N.S., Gasior M. 1 , Vartikyan K. 2 ,Wieczorek-Ciurowa K. 3Institute for Sorption and Problems of Endoecology, NAS of Ukraine, Kyiv, Ukraine1 Institute of Catalysis and Surface Chemistry, PAS, Krakow, Poland2 Institute of Physical Chemistry, NAS of Armenia, Erevan, Armenia3 Institute of Inorganic Chemistry, Krakow University of Technology, Krakow, PolandE-mail: zazhigal@ispe.kiev.uaMechanochemical activation of solids and catalysts in particularly is well known. In ourworks were shown that mechanochemical treatment VPO catalysts and introduction ofpromoters permitted to increase catalytic activity and selectivity of theses compositions in n-butane partial oxidation to maleic anhydride and decrease the pollution of CO, CO 2 ,CH 3 COOH, C 2 H 3 COOH, etc. Mechanochemical synthesis of V-Ti-O composition fromvanadia and titania allows to prepare the catalyst, which oxidizes o-xylene at 280-300 o C withselectivity up to 90 %, that decreases the formation of pollutants.In this study the mechanochemical treatment (Fritsch-6) was used for modification ofCu-Ce-O catalyst properties prepared by citrate method. It was shown that treatment medium(air, Ar, H 2 O, C 2 H 5 OH) influences on surface morphology and valence state of the elements.The Cu-Ce-O catalyst treated in ethanol was very active in CO, C 6 H 6 and C 3 H 8 totaloxidation. As a result of treatment the total CO conversion is reached at 85 o C and retains onthis level more than 100 h. This catalyst is active and selective in CO oxidation in excess ofhydrogen (1 % CO, 1 % O 2 , 98 % H 2 ) at low temperature.The established [1] at mechanochemical treatment of metal oxides effect of waterdecomposition with formation of hydrogen peroxide was used for mechano-catalyticoxidation of aromatic hydrocarbons traces in the water. The data of chromato-massspectrometryshow that after treatment in the presence of catalyst of water containing 1 vol. %of hydrocarbon (benzene, toluene, o-xylene, phenol) its concentration decreases up to 40 ppm.The formation of CO 2 which was one product of reaction after treatment was established. Thenature of catalyst determines the rate of oxidation reaction.References1. V.A.Zazhigalov et al., Solid State Ionics, 101-103 (1997) 1257.583