Tolek Weerachon, Nanthasanti Natdanai, Pongthawornsakun Boontida, Praserthdam Piyasan, Panpranot Joongjai
Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand.
Sci Rep. 2021 May 7;11(1):9786. doi: 10.1038/s41598-021-89082-x.
The TiO supported Ru-based catalysts were prepared with 1.5 wt% Ru and 0-0.8 wt% Co on various TiO (anatase, rutile, P-25, and sol-gel TiO) and studied in the liquid-phase selective hydrogenation of furfural to furfuryl alcohol (FA) under mild conditions (50 °C and 2 MPa H). The presence of high anatase crystallographic composition on TiO support was favorable for enhancing hydrogenation activity, while the strong interaction between Ru and TiO (Ru-TiO sites) was required for promoting the selectivity to FA. The catalytic performances of bimetallic Ru-Co catalysts were improved with increasing Co loading due to the synergistic effect of Ru-Co alloying system together with the strong interaction between Ru and Co as revealed by XPS, H-TPR, and TEM-EDX results. The enhancement of reducibility of Co oxides in the bimetallic Ru-Co catalysts led to higher hydrogenation activity with the Ru-0.6Co/TiO catalyst exhibited the best performances in FA selective hydrogenation of furfural to FA under the reaction conditions used.
在各种二氧化钛（锐钛矿型、金红石型、P-25型和溶胶-凝胶法制备的二氧化钛）上制备了负载量为1.5 wt%钌和0 - 0.8 wt%钴的二氧化钛负载钌基催化剂，并在温和条件（50°C和2 MPa氢气）下对糠醛液相加氢制糠醇（FA）进行了研究。二氧化钛载体上高锐钛矿晶体组成的存在有利于提高加氢活性，而促进对糠醇的选择性则需要钌与二氧化钛之间有强相互作用（钌-二氧化钛位点）。XPS、H-TPR和TEM-EDX结果表明，由于钌-钴合金体系的协同效应以及钌与钴之间的强相互作用，双金属钌-钴催化剂的催化性能随着钴负载量的增加而提高。双金属钌-钴催化剂中氧化钴还原度的提高导致加氢活性更高，在所使用的反应条件下，Ru-0.6Co/TiO催化剂在糠醛选择性加氢制糠醇反应中表现出最佳性能。
