Catalytic performance of sucrose-derived CMK-3 in oxidative dehydrogenation of propane to propene

doi:10.1016/j.apcata.2012.08.044

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punktacja MNiSW [2012 A]: 35

tytuł	Catalytic performance of sucrose-derived CMK-3 in oxidative dehydrogenation of propane to propene
autor	Michorczyk Piotr, Kuśtrowski Piotr , Niebrzydowska Paula , Wach Anna
tytuł czasopisma	Applied Catalysis. A, General
tom	445-446
data wydania	2012
strony	321-328
ISSN	0926-860X
eISSN	1873-3875
DOI	10.1016/j.apcata.2012.08.044
język	angielski
język czasopisma	angielski
abstrakt w j. angielskim	CMK-3 carbon replica was synthesized by carbonization of sucrose introduced to the pore system of a SBA- 15 hard template followed by dissolving SiO 2 with HF. The material with a stable hexagonal structure and an expanded surface area ( S BET = 1287 m 2 /g) was obtained. TG measurements showed that CMK-3 type mesoporous carbon started to be intensively oxidized by molecular O 2 above 723 K. This carbon sample was tested as a catalyst of dehydrogenation of propane to propene under oxidative (O 2 :C 3 H 8 = 0.25, 0.50 and 1.00) and non-oxidative (O 2 :C 3 H 8 = 0.00) conditions in the temperature range from 573 to 873 K. The propene yield increased with rise in the reaction temperature, however above 573 K the formation of side- products (C 2 H 6 , C 2 H 4 , CH 4 and H 2 ) was observed. Moreover, coke was deposited on the catalyst surface. A decrease in the mass of a catalyst bed after the catalytic runs suggested the participation of oxygen in burning of deposited and bulk coke. The surface composition of a spent catalyst was investigated by XPS and TPD analysis. The changes in the concentration of oxygen functional groups, caused by the catalytic reaction, were observed regardless of a reaction temperature and feed composition.
słowa kluczowe w j. angielskim	Oxidative dehydrogenation, Carbon replica, Propene, CMK-3
punktacja wydziałowa	35
wydział:instytut/zakład/katedra	Wydział Chemii : Zakład Technologii Chemicznej
typ	artykuł w czasopiśmie
podtyp	artykuł