A sulfurized hydrodesulfurization catalyst and its preparation method and application
A hydrodesulfurization and catalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, fuel additives, etc., can solve the problems of poor stability, weak interaction, and low dispersion of metal chelates, and achieve metal activity The effect of small phase size, weakened interaction, and increased degree of vulcanization
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Embodiment 1
[0049] Ultrasonic disperse 65mg graphene oxide in 65ml deionized water, stir at 40°C, take 65ml concentration as 4.14×10 -3 mol / L (CH 3 ) 3 NC 6 h 12 N(CH 3 ) 3 Br 2 The solution was added to the graphene oxide dispersion, stirred at 40°C for 24 hours, so that the surfactant and graphene oxide fully acted, and the concentration of 15ml was 8.96×10 -3 mol / L (NH 4 ) 2 MoS 4 The aqueous solution was added dropwise to the above mixed system, stirred for 12 hours, then the reaction mixture system was put into a 100ml polytetrafluoroethylene reactor, and reacted at 120°C for 12 hours, and the obtained black precipitate was washed with deionized water for several times and centrifuged. The obtained product was dried in a vacuum oven at 80° C. for 12 h.
[0050] The dried Mo-based catalyst was placed in a tube furnace at 250° C. under a nitrogen atmosphere and roasted for 4 h to obtain a Mo-based catalyst; 0.3 g of the obtained catalyst was weighed, and 0.75 ml of Ni(NO 3 )...
Embodiment 2
[0058] This embodiment is basically the same as embodiment 1, the only difference is that "take 65ml concentration as 4.14 * 10 -3 mol / L (CH 3 ) 3 NC 6 h 12 N(CH 3 ) 3 Br 2 Add the aqueous solution to the graphene oxide dispersion liquid" and replace it with "take 65ml and the concentration is 8.28×10 -3 mol / L (CH 3 ) 3 NC 6 h 12 N(CH 3 ) 3 Br 2 Add the solution to the graphene oxide dispersion.” The TEM image of the hydrodesulfurization catalyst obtained in this example is shown in figure 2 shown, from figure 2 It can be seen that with the increase of the amount of halogenated polyhydrocarbon quaternary ammonium, the size of the active metal in the prepared hydrodesulfurization catalyst becomes smaller, the stacking is reduced, and the dispersion degree is improved (Table 1). MoS in the hydrodesulfurization catalyst 2 The average length and the average number of stacking layers are shown in Table 1. The performance of the obtained hydrodesulfurization catal...
Embodiment 3
[0060] This embodiment is basically the same as embodiment 2, the only difference is that "take 65ml concentration as 8.28 * 10 -3 mol / L (CH 3 ) 3 NC 6 h 12 N(CH 3 ) 3 Br 2 Add the aqueous solution to the graphene oxide dispersion liquid" and replace it with "take 65ml and the concentration is 1.66×10 -2 mol / L (CH 3 ) 3 NC 6 h 12 N(CH 3 ) 3 Br 2 The aqueous solution is added to the graphene oxide dispersion". The TEM image of the hydrodesulfurization catalyst obtained in this example is shown in image 3 shown, from image 3 It can be seen that the size of the active metal in the prepared hydrodesulfurization catalyst is basically unchanged by increasing the content of the halogenated polyhydrocarbon quaternary ammonium (Table 1). MoS in the hydrodesulfurization catalyst 2 The average length and the average number of stacking layers are shown in Table 1. The performance of the obtained hydrodesulfurization catalyst was evaluated in the same manner as in Exampl...
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