NaCl-Promoted CuO-RuO2/SiO2 Catalysts for Propylene Epoxidation with O-2 at Atmospheric Pressures: A Combinatorial Micro-reactor Study

Download

Date

2015-02-01

Author

Kalyoncu, Sule
Duzenli, Derya
Önal, Işık
Seubsai, Anusorn
Noon, Daniel
Senkan, Selim
Say, Zafer
Vovk, Evgeny I.
ÖZENSOY, EMRAH

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

150
views

0
downloads

A combinatorial approach is used to investigate several alkali metals promoted Cu-Ru binary oxide catalysts with improved catalytic performance in the propylene partial oxidation. 2 %Cu/5 %Ru/c-SiO2 catalyst had the best yield with high propylene conversion and propylene oxide (PO) selectivity. Among the promoters screening in the study, NaCl promotion significantly increased the PO selectivity accompanied by some attenuation in the total propylene conversion. It was proposed that binary oxide catalysts revealed a greater number of exposed catalytically active adsorption sites as compared to monometallic oxide counterparts according to XPS and FTIR results. Besides NaCl addition alters the structure, yielding a significantly improved PO selectivity without any change in the particle size of Cu and Ru oxide according to XRD analysis.

Subject Keywords

Propylene, Epoxidation, Ru, Cu, SiO2

URI

https://hdl.handle.net/11511/30987

Journal

CATALYSIS LETTERS

DOI

https://doi.org/10.1007/s10562-014-1454-7

Collections

Graduate School of Natural and Applied Sciences, Article

Suggestions

OpenMETU
Core

Direct epoxidation of propylene to propylene oxide on various catalytic systems: A combinatorial micro-reactor study Kalyoncu, Sule; Duzenli, Derya; Önal, Işık; Seubsai, Anusorn; Noon, Daniel; Senkan, Selim (2015-02-10) A combinatorial approach is used to investigate several bimetallic catalytic systems and the promoter effect on these catalysts to develop highly active and selective catalysts for direct epoxidation of propylene to propylene oxide (PO) using molecular oxygen. 2%Cu/5%Ru/c-SiO2 catalyst yielded the highest performance with high propylene conversion and PO selectivity among the bimetallic catalytic systems including silver, ruthenium, manganese and copper metals. On the other hand, the most effective catalyst...
Hydrothermal zinc oxide nanowire growth using zinc acetate dihydrate salt AKGUN, Mehmet Can; Kalay, Yunus Eren; Ünalan, Hüsnü Emrah (2012-06-01) Hydrothermal approach is widely used for the synthesis of zinc oxide (ZnO) nanowires. Zinc nitrate hexahydrate, zinc acetate and zinc chloride are three common salts that are used for synthesis. Among these, zinc nitrate hexahydrate is primarily used in many studies and zinc chloride is preferred for electrodeposition. In this work, zinc acetate dihydrate salt is used for the growth of ZnO nanowires and the effects of time, temperature, solution concentration and concentration ratios of the precursor chemic...
Epoxidation of Propylene on a [Ag14O9] Cluster Representing Ag2O (001) Surface: A Density Functional Theory Study Fellah, Mehmet Ferdi; Önal, Işık (2012-01-01) Density functional theory calculations were employed to study partial oxidation of propylene on a [Ag14O9] cluster representing Ag2O (001) surface for which positive effect for ethylene oxide formation has been reported in our earlier work at the same level of theory (Fellah et al., Catal Lett 141: 762, 2011). Propylene oxide (PO), propanal, acetone and G-allyl radical formation reaction mechanisms were investigated. P-allyl formation path and two propylene adsorption paths resulting in PO formation are com...
Nickel(0) nanoparticles supported on bare or coated cobalt ferrite as highly active, magnetically isolable and reusable catalyst for hydrolytic dehydrogenation of ammonia borane Manna, Joydev; AKBAYRAK, SERDAR; Özkar, Saim (Elsevier BV, 2017-12-15) Nickel(0) nanoparticles supported on cobalt ferrite (Ni-0/CoFe2O4), polydopamine coated cobalt ferrite (NP0/PDA-CoFe2O4) or silica coated cobalt ferrite (NP0/SiO2-CoFe2O4) are prepared and used as catalysts in hydrogen generation from the hydrolysis of ammonia borane at room temperature. Ni-0/CoFe2O4 (4.0% wt. Ni) shows the highest catalytic activity with a TOF value of 38.3 min(-1) in hydrogen generation from the hydrolysis of ammonia borane at 25.0 +/- 0.1 degrees C. However, the initial catalytic activit...
Ceria supported rhodium nanoparticles: Superb catalytic activity in hydrogen generation from the hydrolysis of ammonia borane Akbayrak, Serdar; Tonbul, Yalcin; Özkar, Saim (2016-12-05) We investigated the effect of various oxide supports on the catalytic activity of rhodium nanoparticles in hydrogen generation from the hydrolysis of ammonia borane. Among the oxide supports (CeO2, SiO2, Al2O3, TiO2, ZrO2, HfO2) ceria provides the highest catalytic activity for the rhodium(0) nanoparticles in the hydrolysis of ammonia borane. Rhodium(0) nanoparticles supported on nanoceria (Rh-0/CeO2) were prepared by the impregnation of rhodium(III) ions on the surface of ceria followed by their reduction ...

Citation Formats

S. Kalyoncu et al., “NaCl-Promoted CuO-RuO2/SiO2 Catalysts for Propylene Epoxidation with O-2 at Atmospheric Pressures: A Combinatorial Micro-reactor Study,” CATALYSIS LETTERS, pp. 596–605, 2015, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/30987.