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Synthesis and Catalytic Properties of Iron Oxides in the Reaction of Low-Temperature Ozone Decomposition

100%

Rakitskaya T., Truba A., Ennan A., Baumer V., Volkova V.

Acta Physica Polonica A

2018

vol. 133

issue 4

1079-1083

Two sets of iron oxide samples were synthesized applying different iron(III) precursors (FeCl₃ and Fe₂(SO₄)₃) and calcination temperature (200, 300, and 500°C). The samples were characterized by powder X-ray analysis and the Fourier transform infrared spectroscopy. Depending on the synthesis conditions, samples of iron oxides with different phase composition were obtained: polyphase (α -Fe₂O₃, γ -Fe₂O₃, Fe₃O₄, and α -FeO(OH)) and monophase (γ -Fe₂O₃ or α -Fe₂O₃) ones. For the samples of homogeneous composition, it has been found that the activity of γ -Fe₂O₃ in the reaction of ozone decomposition at ozone concentration in gaseous phase of 1 mg/m³ is much higher than the activity of α -Fe₂O₃.

Catalytic Compositions Based on Chlorides of d Metals and Natural Aluminosilicates for the Low-Temperature Sulfur Dioxide Oxidation with Air Oxygen

86%

Rakitskaya T., Kiose T., Golubchik K., Dzhiga G., Ennan A., Volkova V.

Acta Physica Polonica A

2018

vol. 133

issue 4

1074-1078

Samples of natural bentonite and clinoptilolite modified with copper(II), iron(III), and palladium(II) were characterized by both X-ray phase and the Fourier transform infrared spectral methods. The activity of monometallic compositions M_{i}L_{j}/S(M = Co(II), Fe(III), and Pd(II); L = NO₃¯, Cl¯, and SO₄²¯; S = N-CLI or N-Bent) in the reaction with sulfur dioxide was found to depend on the nature of both a metal ion and a support. For bimetallic compositions Cu(II)-Fe(III) and Cu(II)-Pd(II) based on the natural aluminosilicates, a certain synergism in the action of metals forming these pairs towards the reaction of sulfur dioxide oxidation with oxygen was determined.

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2 Acta Physica Polonica A

2 2018

2 Ennan A.

2 Rakitskaya T.

2 Volkova V.

1 Baumer V.

1 Dzhiga G.

1 Golubchik K.

1 Kiose T.

1 Truba A.

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Synthesis and Catalytic Properties of Iron Oxides in the Reaction of Low-Temperature Ozone Decomposition

Catalytic Compositions Based on Chlorides of d Metals and Natural Aluminosilicates for the Low-Temperature Sulfur Dioxide Oxidation with Air Oxygen