Oxidative dehydrogenation of ethane on Pt–Sn impregnated monoliths

Autor:	Bozena Silberova, Anders Holmen, Silje Fosse Håkonsen
Rok vydání:	2007
Předmět:	Hydrogen Inorganic chemistry chemistry.chemical_element General Chemistry Oxidative phosphorylation Photochemistry Oxygen Catalysis Catalytic effect chemistry Dehydrogenation Selectivity Carbon
Zdroj:	Topics in Catalysis. 45:61-67
ISSN:	1572-9028 1022-5528
Popis:	The oxidative dehydrogenation of ethane was studied over Pt–Sn impregnated monoliths at 1 bar, 600–900 °C and with different contents of oxygen, hydrogen and steam in the feed gas. As expected a decrease in oxygen in the feed led to a decrease in the conversion of ethane due to lower temperatures in the reactor. Adding steam to the feed showed no effect on the ethane conversion or the ethene selectivity. When the hydrogen/ethane ratio in the feed was varied from 0 to 0.5 at 700 and 850 °C, it resulted in a significant increase in the selectivity to ethene while the ethane conversion remained relatively unchanged. At 700 °C the selectivity increased from about 50% to 93% (carbon basis) with only a small decrease in the conversion of ethane. The results clearly show that both Pt and Sn have a catalytic effect. Pt caused the ethane conversion to rise and addition of Sn resulted in much better ethene selectivity. However, even though Sn alone showed some catalytic effect at lower temperatures, it cannot explain the great difference between the Pt and Pt–Sn catalysts. A reasonable assumption is therefore that there exist interactions between Pt and Sn that gives the Pt–Sn catalysts excellent properties for oxidative dehydrogenation of ethane, in particular upon addition of hydrogen.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f11718f86ce7a2a82c293c59f8a90bc4 https://doi.org/10.1007/s11244-007-0241-8 Zobrazit plný text záznamu Plný text ve formátu PDF