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Oxidation of thiophene over copper-manganese mixed oxides
Szynkowska, Małgorzata I., Węglińska, Aneta, Wojciechowska, Elżbieta and Paryjczak, Tadeusz Oxidation of thiophene over copper-manganese mixed oxides Chemical Papers, Vol.63, No. 2, 2009, 233-238
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Document type:
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Článok z časopisu / Journal Article |
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Collection:
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Chemical papers
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| Author(s) |
Szynkowska, Małgorzata I.
Węglińska, Aneta
Wojciechowska, Elżbieta
Paryjczak, Tadeusz
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| Title |
Oxidation of thiophene over copper-manganese mixed oxides
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| Journal name |
Chemical Papers
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| Publication date |
2009
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| Year available |
2009
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| Volume number |
63
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| Issue number |
2
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| ISSN |
0366-6352
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| Start page |
233
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| End page |
238
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| Place of publication |
Poland
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| Publisher |
Versita
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| Collection year |
2009
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| Language |
english
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| Subject |
290000 Engineering and Technology
291100 Environmental Engineering
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| Abstract/Summary |
Commercial hopcalite calcined at different temperatures and hopcalite modified with noble metals (Pt, Pd, and Au) were studied in oxidation of thiophene. Surface and bulk properties of catalysts were studied using temperature-programmed reduction (TPRH2), X-ray diffraction method (XRD) and thermal analysis (TG-DTA-MS). It was shown that calcined samples displayed higher activity in comparison with commercial untreated hopcalite; however, a lower temperature of calcination was favourable. High temperature of thermal treatment induced an increase in the crystallinity and a decrease in the surface area of the samples, and, as a consequence, the loss of catalysts activity. Moreover, marked improvement in the catalytic performance of platinum and palladium modified catalysts in relation to base hopcalite was observed. The obtained results indicate that the higher activity of samples containing Pt and Pd was accompanied by better reducibility of the catalysts.
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