Синергетичні ефекти сполук паладію(ІІ) і купруму(ІІ), закріплених на модифікованому флогопіті, в реакції з діоксидом сульфуру
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Дата
2023
Науковий керівник
Укладач
Редактор
Назва журналу
ISSN
E-ISSN
Назва тому
Видавець
Одеський національний університет імені І. І. Мечникова
Анотація
Досліджено кінетику взаємодії діоксиду сульфуру з моно- та біметальними композиціями на основі сполук паладію(ІІ), купруму(ІІ) і кислотно- модифікованого природного (Phl) та термічно- спученого (ТС-Phl) флогопіту. Доведено, що біметальні композиції Pd(II)Cu(II)-KBr/ ( = 6H-Phl-1; H-TC-Phl-1, = 1, 2, 3, 6 M HNO3) в реакції з SO2 виявляють синергетичний ефект з коефіцієнтом КS >> 1, що призводить до збільшення часу захисної дії зразків та кількості поглиненого діоксиду сульфуру.
Palladium(II) and cuprum(II) compounds are the basic components of the Wacker-type heterogeneous catalyst for the low-temperature oxidation of carbon monoxide with oxygen. Al2O3, activated carbon and carbon fiber materials are most commonly used as a carrier. In search of new potential natural media, layered aluminosilicate – phlogopite as part of natural phlogopite concentrate was investigated and it was proved that copper- palladium catalysts are formed on acid-modified samples of phlogopite, which provide a high degree of conversion of carbon monoxide, which meets the sanitary and chemical norm of CO in the working area, namely ≤ 20 mg/m3. Regardless of the nature of the carrier, it was found that the catalytic effect is achieved due to the synergism of palladium(II) and copper(II). A typical situation is when carbon monoxide and sulfur dioxide are simultaneously present in the waste gases of industrial enterprises. In this regard, research on the polyfunctionality of the Pd(II)- Cu(II)/ nanocatalyst is relevant. The kinetics of the interaction of sulfur dioxide with mono- and bimetallic compositions based on compounds of palladium(II), copper(II) and acid-modified natural (Phl) and thermally swollen (TS-Phl) phlogopite were studied. It was established that monometallic compositions М(ІІ)-KBr/ Н-TC-Phl-1, М(ІІ) = Cu(ІІ), Pd(ІІ) fixed on acid-modified samples of swollen phlogopite, except for 6Н-TS-Phl-1, do not show protective properties against sulfur dioxide. It has been proven that the bimetallic compositions Pd(II)-Cu(II)-KBr/ ( = 6H-Phl-1; H-TS-Phl-1, = 1, 2, 3, 6 M HNO3) in the reaction with SO2 reveal a synergistic effect with a coefficient of КS >> 1, which leads to an increase in the time of the protective action of the samples and the amount of absorbed sulfur dioxide. The synergism constant depends on the conditions of acid modification of the carrier and has a maximum value in the case of the bimetallic composition fixed on the carrier 2Н-ТS-Phl-1.
Palladium(II) and cuprum(II) compounds are the basic components of the Wacker-type heterogeneous catalyst for the low-temperature oxidation of carbon monoxide with oxygen. Al2O3, activated carbon and carbon fiber materials are most commonly used as a carrier. In search of new potential natural media, layered aluminosilicate – phlogopite as part of natural phlogopite concentrate was investigated and it was proved that copper- palladium catalysts are formed on acid-modified samples of phlogopite, which provide a high degree of conversion of carbon monoxide, which meets the sanitary and chemical norm of CO in the working area, namely ≤ 20 mg/m3. Regardless of the nature of the carrier, it was found that the catalytic effect is achieved due to the synergism of palladium(II) and copper(II). A typical situation is when carbon monoxide and sulfur dioxide are simultaneously present in the waste gases of industrial enterprises. In this regard, research on the polyfunctionality of the Pd(II)- Cu(II)/ nanocatalyst is relevant. The kinetics of the interaction of sulfur dioxide with mono- and bimetallic compositions based on compounds of palladium(II), copper(II) and acid-modified natural (Phl) and thermally swollen (TS-Phl) phlogopite were studied. It was established that monometallic compositions М(ІІ)-KBr/ Н-TC-Phl-1, М(ІІ) = Cu(ІІ), Pd(ІІ) fixed on acid-modified samples of swollen phlogopite, except for 6Н-TS-Phl-1, do not show protective properties against sulfur dioxide. It has been proven that the bimetallic compositions Pd(II)-Cu(II)-KBr/ ( = 6H-Phl-1; H-TS-Phl-1, = 1, 2, 3, 6 M HNO3) in the reaction with SO2 reveal a synergistic effect with a coefficient of КS >> 1, which leads to an increase in the time of the protective action of the samples and the amount of absorbed sulfur dioxide. The synergism constant depends on the conditions of acid modification of the carrier and has a maximum value in the case of the bimetallic composition fixed on the carrier 2Н-ТS-Phl-1.
Опис
Ключові слова
діоксид сульфуру, модифікований флогопіт, паладій(ІІ), купрум(ІІ), синергетичний ефект, sulfur dioxide, modifications of phlogopite, palladium(II), copper(II), synergistic effect
Бібліографічний опис
Вісник Одеського національного університету = Odesa National University Herald