A kind of moc/cn catalyst and its preparation method and the application in oleic acid hydrodeoxygenation reaction
A hydrodeoxygenation and catalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, nanotechnology for materials and surface science, etc., can solve the problem of large particle size, limited molybdenum carbide catalyst activity, and low dispersion and other problems to achieve the effects of strong binding, reduced particle size, and increased dispersibility
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Embodiment 1
[0032] First, dicyandiamide was impregnated with ammonium molybdate solution, and after vacuum drying, the molybdenum carbide catalyst supported by nitrogen-rich carbon material was prepared by temperature-programmed reduction method under nitrogen atmosphere. The carbon material was used as a catalyst carrier; the prepared catalyst, oleic acid, and n-hexane were added to a batch reactor, and reacted for 3 hours at a reaction temperature of 330°C, an initial hydrogen pressure of 3MPa, and a stirring rate of 500rpm.
[0033] Weighed 0.92g of ammonium molybdate tetrahydrate and dissolved it in 11.0g of distilled water, then dropped into 20.0g of NMC, ultrasonicated for 1h, and vacuum dried at 80°C for 12h to obtain a catalyst precursor. The precursor was placed in a tube furnace, and the temperature was programmed under 150 mL / min of nitrogen. Raise from room temperature to 700°C at a rate of 3°C / min and keep for 3h. After the furnace temperature dropped to room temperature, sw...
Embodiment 2
[0038] The preparation method of the catalyst and the hydrodeoxygenation reaction of oleic acid are the same as in Example 1, but the amount of ammonium molybdate tetrahydrate used is 3.68 g, and the obtained catalyst is designated as MoC / CN-700-2. The XRD pattern of the catalyst is as figure 1 As shown, the transmission electron microscope image is shown as figure 2 The particle size of molybdenum carbide calculated from the TEM images and the results of CO chemisorption are shown in Table 1.
[0039] Under these conditions, the conversion rate of oleic acid hydrodeoxygenation reaches 83.7%, and the deoxygenation rate reaches 67.7%.
Embodiment 3
[0041] The preparation method of the catalyst and the hydrodeoxygenation reaction of oleic acid are the same as in Example 1, but the amount of ammonium molybdate tetrahydrate used is 5.52 g, and the obtained catalyst is designated as MoC / CN-700-3.
[0042] Under these conditions, the conversion rate of oleic acid hydrodeoxygenation reaches 78.8%, and the deoxygenation rate reaches 50.1%.
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