Physicochemical and Catalytic Properties of the Solid Component of Welding Aerosol

Rakitskaya, T. L.; Еннан, А. А.; Truba, A. S.; Kiro, S.A.; Volkova, V. Ya.

doi:10.15407/hftp05.04.396

Cited by 4 publications

(4 citation statements)

References 10 publications

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“…3 compositions. These data are consistent with the results of copper(II) desorption applied to natural aluminosilicates 22,23 and prove that copper(II) on the carbon surface does not change the degree of oxidation.…”

Section: The State Of the Basic Components In The Pd(ii)-cu(ii)/cfm C...supporting

confidence: 90%

“…To determine the state and relative strength of the connection of the catalyst components with the carbon surface, a simple chemical method was used, based on the desorption of the catalyst components by various eluents and comparing the activity of the catalyst model sample with the activity of the control sample. 22,23 Table 2 summarizes the results of palladium and copper desorption from samples containing only palladium (No. 1) or copper (No.…”

Section: The State Of the Basic Components In The Pd(ii)-cu(ii)/cfm C...mentioning

confidence: 99%

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Composition and Activity of Copper-Palladium Catalyst on Carbon Fiber Material for Air Purification from Carbon Monoxide

Kiose,

Rakitskaya,

Ennan

et al. 2023

ChChT

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A set of research methods (X-ray phase, desorption, kinetic) was used to determine the state of the basic components K2PdCl4 and Cu(NO3)2 in the catalyst for the oxidation of carbon monoxide by oxygen. It was found that the palladium (II) and copper (II) initial compounds under the action of carbon fiber carrier change their state. Palladium is reduced to X-ray amorphous Pd0, and copper (II) is in the form of a crystalline phase Cu2(OH)3Cl. It was found that the catalyst exhibits protective properties within the initial concentrations of carbon monoxide  300 mg/m3 and an effective contact time of 0.45 s and can be used in human respiratory protection.

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Section: The State Of the Basic Components In The Pd(ii)-cu(ii)/cfm C...supporting

confidence: 90%

Section: The State Of the Basic Components In The Pd(ii)-cu(ii)/cfm C...mentioning

confidence: 99%

Composition and Activity of Copper-Palladium Catalyst on Carbon Fiber Material for Air Purification from Carbon Monoxide

Kiose,

Rakitskaya,

Ennan

et al. 2023

ChChT

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show abstract

“…Анализ литературных данных по физико-химическим свойствам твердой со-ставляющей сварочного аэрозоля (ТССА) [1][2][3][4][5][6][7][8][9] показал, что основное внимание исследователей сосредоточено на установлении его химического и фазового со-става, зависящего, как правило, от условий сварки и материалов.…”

Section: ик-спектральные характеристикиunclassified

PHYSICO-CHEMICAL PRoPERtIES OF The SOLID CoMPONENT OF WELDING AEROSOL. 2. IR SPECTRAL CHARACTERISTICS

Rakitskaya¹,

Truba²,

Ennan³

et al. 2015

Odesa National University Herald. Chemistry

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“…As appears from literature, chemical and phase compositions of SCWAs depend on a nature of weld metals and electrodes, materials of electrode coatings, and welding conditions [ 2 – 12 ]. Our investigations show that magnetite and manganochromite contained in compositions of SCWAs formed in the process of steel welding by some electrodes manufactured in Ukraine exhibit stable catalytic behavior in the reaction of ozone decomposition for the wide range of ozone concentrations (1–100 mg/m 3 ) [ 13 , 14 ]. It can be expected that an increase in concentrations of catalytically active phases in SCWAs obtained as a result of removing impurity phases and phases inactive in the reaction of ozone decomposition would lead to a change in kinetic and stoichiometric parameters of the reaction.…”

Section: Introductionmentioning

confidence: 99%

Nanostructured Polyphase Catalysts Based on the Solid Component of Welding Aerosol for Ozone Decomposition

Rakitskaya¹,

Truba²,

Еннан³

et al. 2015

Nanoscale Res Lett

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Samples of the solid component of welding aerosols (SCWAs) were obtained as a result of steel welding by ANO-4, TsL‑11, and UONI13/55 electrodes of Ukrainian manufacture. The phase compositions of the samples, both freshly prepared (FP) and modified (M) by water treatment at 60 °C, were studied by X-ray phase analysis and IR spectroscopy. All samples contain magnetite demonstrating its reflex at 2θ ~ 35° characteristic of cubic spinel as well as manganochromite and iron oxides. FP SCWA-TsL and FP SCWA-UONI contain such phases as СaF2, water-soluble fluorides, chromates, and carbonates of alkali metals. After modification of the SCWA samples, water-soluble phases in their composition are undetectable. The size of magnetite nanoparticles varies from 15 to 68 nm depending on the chemical composition of electrodes under study. IR spectral investigations confirm the polyphase composition of the SCWAs. As to IR spectra, the biggest differences are apparent in the regions of deformation vibrations of M–O–H bonds and stretching vibrations of M–O bonds (M–Fe, Cr). The catalytic activity of the SCWAs in the reaction of ozone decomposition decreases in the order SCWA-ANO > SCWA-UONI > SCWA-TsL corresponding to the decrease in the content of catalytically active phases in their compositions.

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Physicochemical and Catalytic Properties of the Solid Component of Welding Aerosol

Cited by 4 publications

References 10 publications

Composition and Activity of Copper-Palladium Catalyst on Carbon Fiber Material for Air Purification from Carbon Monoxide

Composition and Activity of Copper-Palladium Catalyst on Carbon Fiber Material for Air Purification from Carbon Monoxide

PHYSICO-CHEMICAL PRoPERtIES OF The SOLID CoMPONENT OF WELDING AEROSOL. 2. IR SPECTRAL CHARACTERISTICS

Nanostructured Polyphase Catalysts Based on the Solid Component of Welding Aerosol for Ozone Decomposition

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