Abstract
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 Ni6MoC–SiO2 (400/600) and Ni1MoC–SiO2 (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).
Highlights
An intensive growth of energy consumption has led to the search for new types of alternative fuel and their comprehensive study
We studied the effect of heat treatment of Ni–Mo carbide on its composition and catalytic properties in furfural hydrogenation to produce furfuryl alcohol (FA) and 2-MF
The experiments demonstrated that the introduction of stabilizing SiO2 additive into the molybdenum carbide catalyst significantly increases the activity of MoC during hydrogenation of furfural
Summary
An intensive growth of energy consumption has led to the search for new types of alternative fuel and their comprehensive study. FA is used for the production of polyesters, polyurethane foams and as a chemical building block for the synthesis of some pharmaceuticals (e.g., ranitidine) and fragrances [5,8] Another high-value derivative, which can be obtained from furfural by selective hydrogenation, is 2-methylfuran. Rui Ma et al [33] studied the process of guaiacol deoxygenation to monooxygenated phenols over activated carbon supported molybdenum carbide They showed that similar conversion and selectivity towards the target products were achieved in three cycles of catalysts exploitation. An important factor is that there is a method for regeneration of carbide catalysts by sequential oxidization of cemented metal carbide at a high temperature above 600 ◦ C and carbonization with a gas mixture of methane and hydrogen [36]. The carbon deposition during furfural hydrogenation is studied by CHNS analysis of catalysts before and after the reaction
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
