Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/5628
Title: Epoxidation of propene by high-throughput screening method over combinatorially prepared cu catalysts supported on high and low surface area silica
Authors: Düzenli, Derya
Şeker, Erol
Senkan, Selim
Önal, Işık
Keywords: Epoxidation
High-throughput
Propene
Sol-Gel
Catalyst supports
Issue Date: Oct-2012
Publisher: Springer Verlag
Source: Düzenli, D., Şeker, E., Senkan, S. and Önal, I. (2012). Epoxidation of propene by high-throughput screening method over combinatorially prepared cu catalysts supported on high and low surface area silica. Catalysis Letters, 142(10), 1234-1243. doi:10.1007/s10562-012-0867-4
Abstract: Gas phase epoxidation of propene using molecular oxygen was studied by use of a high-throughput testing technique. A large number of catalysts including promoted and un-promoted Cu were synthesized in a much faster combinatorial fashion using a sol-gel method. Metal catalysts supported on high and low surface area silica were tested and ranked in a high-throughput activity and selectivity testing apparatus at different experimental conditions such as reaction temperature and reactant gas ratio. The amount of Cu loading and the addition of alkali promoters such as K and Li resulted in different tendencies in consumption rate for both silica materials. The maximum PO production rate was obtained as 25.82 μmol/g/ cat./min (2.90 % conv. and 20.49 % selectivity) for 3 % Cu-2.25 % K catalyst supported on high surface area silica. There was no noticeable difference in structural and chemical properties of catalysts after modification with K when examined by XRD and TEM; however, the overall activation energy of un-modified catalysts (92 kJ/mol) decreased to 71 kJ/mol for K-modified catalyst. There was negligible difference between the activation energies calculated for PO production (75 vs. 77 kJ/mol).
URI: http://dx.doi.org/10.1007/s10562-012-0867-4
http://hdl.handle.net/11147/5628
ISSN: 1011-372X
Appears in Collections:Chemical Engineering / Kimya Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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