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Effect of Ni–Mo Carbide Catalyst Formation on Furfural Hydrogenation

机译：镍钼碳化物催化剂形成对糠醛加氢的影响

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High-loading Ni–Mo carbide catalysts were prepared by the modified gel-combustion method under various thermal treatment conditions. All samples were studied by X-ray diffraction (XRD) analysis, which showed that the catalysts could contain cubic and hexagonal molybdenum carbides, nickel, nickel oxide and Ni–Mo solid solutions, depending on the thermal treatment conditions. Study of catalyst activity and selectivity in the hydrogenation of furfural was carried out in a batch reactor at 150 °C and hydrogen pressure 6.0 MPa. Analysis of the reaction products showed that the highest yields of 2-methylfuran (2-MF) and furfuryl alcohol (FA) were achieved using catalysts synthesized by calcination of the nickel-molybdenum-carbon precursor at 400 °С with the following reduction in a stream of hydrogen at 600 °C. The best results for production of FA with a yield of 80 mol % and 2-MF with a yield of 29 mol % were observed using Ni 6 MoC–SiO 2 (400/600) and Ni 1 MoC–SiO 2 (400/600) catalysts, respectively. It has been shown that the addition of nickel to the carbide molybdenum catalyst significantly increases the activity of the catalytic systems. In addition, nickel also contributes to the formation of products formed by hydrogenation of the aromatic ring tetrahydrofurfuryl alcohol (THFA) and 2-methyltetrahydrofuran (2-MTHF).
机译：通过改进的凝胶燃烧方法在各种热处理条件下制备了高负荷的Ni-Mo碳化物催化剂。所有样品均通过X射线衍射（XRD）分析进行了研究，结果表明，根据热处理条件，催化剂可能包含立方和六方碳化钼，镍，氧化镍和Ni-Mo固溶体。在糠醛氢化反应中的催化剂活性和选择性的研究是在间歇式反应器中在150℃和氢气压力6.0 MPa下进行的。反应产物的分析表明，使用通过在400°C下煅烧镍-钼-碳前驱体并随后在以下条件下进行还原而合成的催化剂，可以实现2-甲基呋喃（2-MF）和糠醇（FA）的最高收率。 600°C的氢气流。使用Ni 6 MoC-SiO 2（400/600）和Ni 1 MoC-SiO 2（400/600）观察到生产FA的最佳结果，产率为80 mol％，2-MF的产率为29 mol％。 ）催化剂。已经表明，向碳化钼催化剂中添加镍显着提高了催化体系的活性。另外，镍还有助于形成通过芳族环四氢糠醇（THFA）和2-甲基四氢呋喃（2-MTHF）的氢化而形成的产物。

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