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The effect of supports on coke deposition on supported platinum and platinum-tin catalysts investigated by FT-IR spectroscopy

100%
Sarbak Z.
Polish Journal of Chemical Technology
|
2007
|
vol. 9
|
issue 1
23-26
EN
Coke deposit is produced from ethylene on the surface of the platinum and platinum-tin catalysts supported on two various Al2 O3, SiO2 and SiO2 -Al2O3. The coke amount and the structure depend on the type and the amount of the components introduced onto the catalyst support and on the type of the support. It has been found that the surface area of the support has no significant effect on the type of species in the coke deposit. The analysis of the FT-IR spectra has shown the presence of different species on the surface of the catalysts, including carboxyl groups, pseudo-graphite (polyaromatic) structures, polyphenylene groups, acetyl groups, carbonyl groups of acetone and formate type, enol species.
2
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Removal of carbonaceous matters over alumina supported chromium and platinum chromium catalysts

51%
Sarbak Z., Surma K., Wieczorek K.
Polish Journal of Chemical Technology
|
2008
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vol. 10
|
issue 1
57-59
EN
Platinum, both alone and with a low and high amount of chromium as an additive supported on alumina, was studied as a catalyst. These catalysts were examined in the removal of the carbonizate as a model material. It was found that the 2Cr/Al2O3 catalyst showed a significant increase in the catalytic activity as compared to 20Cr/Al2O3. An addition of platinum was found to cause a decrease of activity.
3
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Structural and textural characterisation of NiMo catalysts supported on various zeolites

51%
Sarbak Z., Fabiś G., Binkowski S.
Polish Journal of Chemical Technology
|
2007
|
vol. 9
|
issue 1
27-32
EN
Structural and textural properties of nickel-molybdenum catalysts supported on four various type of zeolites of different chemical composition and porous structure have been studied by the methods of IR, XRD and the low-temperature sorption of nitrogen. The catalysts have been obtained by the two-stage impregnation of the supports with the solutions of nickel and molybdenum salts by the method of incipient wetness. The catalysts have been shown to preserve the structure characteristic of the appropriate zeolite supports.
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