Sosa Leticia F, de Souza Priscilla M, Rafael Raphaela A, Marceau Eric, Briois Valérie, Toniolo Fabio S, Noronha Fabio B, Dumeignil Franck, Paul Sébastien
Chemical Engineering Program of COPPE/UFRJ, Federal University of Rio Janeiro P. O. Box 68502 Rio de Janeiro CEP 21941-972 Brazil.
Univ. Lille, CNRS, Centrale Lille, Univ. Artois, UMR 8181 - UCCS - Unité de Catalyse et Chimie du Solide F-59000 Lille France
RSC Adv. 2024 Aug 27;14(37):26920-26932. doi: 10.1039/d4ra04256e. eCollection 2024 Aug 22.
Materials exhibiting different textural and surface properties (SiO, TiO, ZrO and ZSM-5) were investigated as supports for Mo carbides in the upgrading of furfural (FF) in liquid phase to produce 2-methylfuran (2MF). The state of the catalysts after carburization, passivation, and reactivation under a hydrogen atmosphere was investigated by XAS analysis. The effect of the supports was observed in the first step of the reaction, , the hydrogenation of FF to furfuryl acid and related to Lewis acidic and basic sites. The nature of the supports was also relevant to the final state of the Mo carbides after carburization, passivation, and reactivation. The comparison of the materials showed that MoC/SiO was the least decarburized catalyst after reactivation, and the most active in converting furfural, while the MoC/TiO system presented smaller carbide particles after carburization and more disorganized particles after reactivation. Mo carbide supported on SiO and on TiO were found to be suitable catalysts for producing a mixture containing 2-methylfuran and C compounds with potential application as biofuel.
研究了具有不同结构和表面性质的材料（SiO、TiO、ZrO和ZSM-5）作为碳化钼载体在糠醛（FF）液相升级制备2-甲基呋喃（2MF）中的应用。通过XAS分析研究了催化剂在渗碳、钝化和氢气气氛下再活化后的状态。在反应的第一步，即FF加氢生成糠醇酸的过程中观察到了载体的影响，这与Lewis酸性和碱性位点有关。载体的性质也与渗碳、钝化和再活化后碳化钼的最终状态有关。材料比较表明，MoC/SiO是再活化后脱碳最少的催化剂，也是糠醛转化活性最高的催化剂，而MoC/TiO体系在渗碳后碳化颗粒较小，再活化后颗粒更无序。负载在SiO和TiO上的碳化钼被发现是生产含有2-甲基呋喃和C化合物混合物的合适催化剂，该混合物具有作为生物燃料的潜在应用价值。
