New Catalytic Materials for the Direct Epoxidation of Propylene by Oxygen: Application of High-Throughput Pulsed Laser Ablation

Kahn, Michael
Seubsai, Anusorn
Önal, Işık
Senkan, Selim
New catalytic materials were prepared by depositing nanoparticles of 35 different metals as well as their select binary combinations on Al2O3, CeO2, SiO2, TiO2, and ZrO2 supports. Nanoparticles were synthesized by high-throughput pulsed laser ablation (PLA). Catalytic materials were then screened for their selectivities towards the synthesis propylene oxide (PO) from propylene and oxygen using array channel microreactors at 1 atm and 300, 333, and 367 A degrees C. A gas hourly space velocity (GHSV) of 20,000 h(-1) was used at the feed gas composition of 20% O-2, 20% C3H6 and the balance He. Initial screening experiments resulted in the discovery of SiO2 supported Cr, Mn, Cu, Ru, Pd, Ag, Sn, and Ir as the most promising leads for PO synthesis. Subsequent experiments pointed to bimetallic Cu-on-Mn/SiO2, for which the PO yields increased several fold over single metal catalysts. For multimetallic materials, the sequence of deposition of the active metals was shown to have a significant effect on the resulting catalytic activity and selectivity.


High Throughput Synthesis and Screening of New Catalytic Materials for the Direct Epoxidation of Propylene
Kahn, Michael; Seubsai, Anusorn; Önal, Işık; Senkan, Selim (2010-01-01)
Nanoparticles of 35 individual metals as well as their binary combinations were synthesized using High Throughput pulsed laser ablation (PLA), and collected on Al2O3, CeO2, SiO2, TiO2, and ZrO2 pellets. These materials were then screened for their catalytic activities and selectivities for the partial oxidation of propylene, in particular for propylene oxide (PO), using array channel microreactors. Reaction conditions were the following: 1 atm pressure, gas hourly space velocity (GHSV) of 20,000 h(-1), temp...
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Solid acid catalysts are extensively used in a number of industrially important catalytic reactions. Here, water-insoluble novel mesoporous solid acid catalysts, with a unique structure composed of WOx nanorods and W nanoballs within an amorphous silicate lattice, were synthesized following a one-pot hydrothermal route. using silicotungstic acid (STA) as the active component. Surface area of these catalysts ire more than 2 orders of magnitude higher than that of pure STA, and they showed very high activity ...
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Citation Formats
M. Kahn, A. Seubsai, I. Önal, and S. Senkan, “New Catalytic Materials for the Direct Epoxidation of Propylene by Oxygen: Application of High-Throughput Pulsed Laser Ablation,” TOPICS IN CATALYSIS, pp. 86–91, 2010, Accessed: 00, 2020. [Online]. Available: