Surface Modification of a Supported Pt Catalyst Using Ionic Liquids for Selective Hydrodeoxygenation of Phenols into Arenes under Mild Conditions |
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| Authors: | Dr Hidetoshi Ohta Kanako Tobayashi Akihiro Kuroo Mao Nakatsuka Dr Hirokazu Kobayashi Prof?Dr Atsushi Fukuoka Dr Go Hamasaka Prof?Dr Yasuhiro Uozumi Dr Haruno Murayama Prof?Dr Makoto Tokunaga Dr Minoru Hayashi |
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| Institution: | 1. Department of Materials Science and Biotechnology, Graduate School of Science and Engineering, Ehime University, 3 Bunkyo-cho, Matsuyama, 790-8577 Japan;2. Institute for Catalysis, Hokkaido University, Kita 21 Nishi 10, Kita-ku Sapporo, 001-0021 Hokkaido, Japan;3. Institute for Molecular Science, Myodaiji, Okazaki, 444-8787 Japan;4. Department of Chemistry, Faculty of Science, Graduate School of Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395 Japan |
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| Abstract: | The selective and efficient removal of oxygenated groups from lignin-derived phenols is a critical challenge to utilize lignin as a source for renewable aromatic chemicals. This report describes how surface modification of a zeolite-supported Pt catalyst using ionic liquids (ILs) remarkably increases selectivity for the hydrodeoxygenation (HDO) of phenols into arenes under mild reaction conditions using atmospheric pressure H2. Unmodified Pt/H-ZSM-5 converts phenols into aliphatic species as the major products along with a slight amount of arenes (10 % selectivity). In contrast, the catalyst modified with an IL, 1-butyl-3-methylimidazolium triflate, keeps up to 76 % selectivity for arenes even at a nearly complete conversion of phenols. The IL on the surface of Pt catalyst may offer the adsorption of phenols in an edge-to-face manner onto the surface, thus accelerating the HDO without the ring hydrogenation. |
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| Keywords: | arenes hydrodeoxygenation ionic liquids phenols platinum |
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