Propylene Epoxidation to Propylene Oxide Over RuO₂, CuO, TeO₂, and TiO₂ Supported on Modified Mesoporous Silicas.

Author(s) Thongboon, S.; Rittiron, P.; Kiatsaengthong, D.; Chukeaw, T.; Seubsai, A.
Journal J Nanosci Nanotechnol
Date Published 2020 Jun 01

Direct gas phase epoxidation of propylene to propylene oxide (PO) using O₂ is a challenging problem in catalysis research. Silica-supported ruthenium-copper-based catalysts have been recently reported to be promising for propylene epoxidation. In this work, mesoporous silica supports modified with RuO₂, CuO, and TeO₂ with and without TiO₂ were investigated for propylene epoxidation to PO. The prepared catalysts were divided into two groups. The first group consisted of mesoporous silica supports modified with RuO₂, CuO, and TeO₂, and the second group consisted of the same components as the first group but adding TiO₂. The prepared supports and catalysts were characterized using BET surface area analysis and other advanced instrument techniques. It was found that the catalyst made with RuO₂ and TeO₂ impregnated onto porous silica modified with CuO and TiO₂ (denoted as RuTe/CuTiSi) exhibited an excellent PO formation of 344 g h kg, which was superior to that of the other prepared catalysts. Moreover, the addition of TiO₂ into the catalyst greatly improved the PO formation rate and the arrangement of active components in the catalyst and strongly influenced catalytic performance.

DOI 10.1166/jnn.2020.17408
ISSN 1533-4899
Citation J Nanosci Nanotechnol. 2020;20(6):34663477.

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