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Catalytic synthesis of higher α-olefins by paraffin cracking
Abstract Catalysts for the synthesis of higher α-olefins by the atmospheric-pressure cracking of paraffins in the temperature range of 450–570°C have been proposed. Natural zeolite from the Shankanay deposit in Almaty oblast was modified with inorganic and organic acids and a tungsten 12-heteropoly acid (HPA). The modification enhances the paraffin cracking ability; the best result was achieved with the tungstic 12-HPA. The strength and concentration of acid sites of the catalysts were determined by the IR measurement of CO adsorption. The HPA-promoted catalysts were found to contain a large amount of strong acid sites. The modification of natural zeolite with HPA leads to an increase in the total surface area from 22 to 257 m2/g. TEM images show the presence of ordered HPA structures of a few nanometers in size in zeolite pores. The abnormal rise in catalytic activity is associated with the emergence of new nanosized HPA structures on the zeolite surface.
Catalytic synthesis of higher α-olefins by paraffin cracking
Abstract Catalysts for the synthesis of higher α-olefins by the atmospheric-pressure cracking of paraffins in the temperature range of 450–570°C have been proposed. Natural zeolite from the Shankanay deposit in Almaty oblast was modified with inorganic and organic acids and a tungsten 12-heteropoly acid (HPA). The modification enhances the paraffin cracking ability; the best result was achieved with the tungstic 12-HPA. The strength and concentration of acid sites of the catalysts were determined by the IR measurement of CO adsorption. The HPA-promoted catalysts were found to contain a large amount of strong acid sites. The modification of natural zeolite with HPA leads to an increase in the total surface area from 22 to 257 m2/g. TEM images show the presence of ordered HPA structures of a few nanometers in size in zeolite pores. The abnormal rise in catalytic activity is associated with the emergence of new nanosized HPA structures on the zeolite surface.
Catalytic synthesis of higher α-olefins by paraffin cracking
Konuspayev, S. R. (Autor:in) / Kadirbekov, K. A. (Autor:in) / Sarsekova, A. T. (Autor:in) / Nurbayeva, D. R. (Autor:in) / Zhambakin, D. K. (Autor:in)
Petroleum Chemistry ; 50 ; 368-372
01.09.2010
5 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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