NDLI: Effect of H$_{2}$S on the hydrogenation of carbon dioxide over supported Rh catalysts

Content Provider	Springer Nature Link
Author	Szailer, Tamás vák, Éva Oszkó, Albert Erdőhelyi, András
Copyright Year	2007
Abstract	The hydrogenation of CO$_{2}$ was studied on supported noble metal catalysts in the presence of H$_{2}$S. In the reaction gas mixture containing 22 ppm H$_{2}$S the reaction rate increased on TiO$_{2}$ and on CeO$_{2}$ supported metals (Ru, Rh, Pd), but on all other supported catalysts or when the H$_{2}$S content was higher (116 ppm) the reaction was poisoned. FTIR measurements revealed that in the surface interaction of H$_{2}$ + CO$_{2}$ on Rh/TiO$_{2}$ Rh carbonyl hydride, surface formate, carbonates and surface formyl were formed. On the H$_{2}$S pretreated catalyst surface formyl species were missing. TPD measurements showed that adsorbed H$_{2}$S desorbed as SO$_{2}$, both from TiO$_{2}$-supported metals and from the support. IR, XP spectroscopy and TPD measurements demonstrated that the metal became apparently more positive when the catalysts were treated with H$_{2}$S and when the sulfur was built into the support. The promotion effect of H$_{2}$S was explained by the formation of new centers at the metal/support interface.
Starting Page	79
Ending Page	86
Page Count	8
File Format	PDF
ISSN	10225528
Journal	Topics in Catalysis
Volume Number	46
Issue Number	1-2
e-ISSN	15729028
Language	English
Publisher	Springer-Verlag
Publisher Date	2007-01-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	H$_{2}$ + CO$_{2}$ reaction effect of H$_{2}$S supported Rh catalysts TiO$_{2}$ supported noble metals Catalysis Physical Chemistry Pharmacy Industrial Chemistry/Chemical Engineering Characterization and Evaluation of Materials
Content Type	Text
Resource Type	Article
Subject	Chemistry Catalysis

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