COMPOSITIONS BASED ON PALLADIUM(II) AND COPPER(II) COMPOUNDS, HALIDE IONS, AND BENTONITE FOR OZONE DECOMPOSITION
Journal Title: Вісник Одеського національного університету. Хімія - Year 2017, Vol 22, Issue 2
Abstract
In the work, the kinetics of ozone decomposition over compositions containing bentonite anchored compounds of palladium(II) and copper(II) as well as bromide ions was studied. It has been found that bentonite by itself decomposes ozone; however, its activity is not high. Profiles of kinetic curves are drastically changed after anchoring potassium bromide onto natural bentonite. An increase in KBr concentration does not result in changes in a form of kinetic curves: for all samples, the periods of time are observed when C f O3= 0. The length of these periods is unchangeable since CKBr = 1.02·10-4 mol/g. The twentyfold increase in bromide ion concentration causes only 2.5-fold increment in the amount of ozone entered into the reaction indicating a complicated proceeding of the reaction of ozone decomposition with a bromide ion. For Cu(II)-KBr/N-Bent composition, kinetic and calculation data show that, in the presence of bromide ions, copper(II) inhibits the ozone decomposition. For Pd(II)-KBr/NBent composition, it has been found that the maximum activity is attained at СPd(II) = 1.02·10-5 mol/g. For bimetallic Pd(II)- Cu(II)-KBr/N-Bent composition, changes in τ0, τ1/2, k1/2, and Q1/2 parameters depending on a Pd(II) content are similar to those for monometallic Pd(II)-KBr/NBent composition; however, values of the parameters are higher for the monometallic system. Thus, the inhibiting effect of Cu(II) is observed even in the presence of palladium(II).
Authors and Affiliations
T. L. Rakitskaya, G. M. Dzhyga, A. S. Truba
Keywords
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- EP ID EP334662
- DOI 10.18524/2304-0947.2017.2(62).102189
- Views 98
- Downloads 0
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