Pd doping and Mo hole cooperatively controlled molybdenum carbide catalyst for naphthalene hydrogenation reaction as well as preparation method and application thereof
A hydrogenation reaction, molybdenum carbide technology, applied in the direction of carbon compound catalysts, physical/chemical process catalysts, catalysts, etc., can solve the problems of few active sites, small specific surface area of hydrogenation catalysts, and low deep hydrogenation capacity. The effects of low cost, excellent low-temperature deep hydrogenation catalytic activity, and simple and easy preparation method
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Embodiment 1
[0031] A PD doping for naphthalene hydrogenation and a silicon carbide catalyst regulated by Mo hole coordination, prepared according to the following preparation step:
[0032] (1) 3.45 g of four hydrated molybdate is dissolved in 30 ml of deionized water, and then the PD accounts for 0.5% of the total mass of MOC + PD in the final resulting carbonized molybdenum catalyst, and the palladium nitrate solution is added, stirred at 30 ° C. 4h to obtain the first solution.
[0033] (2) Place the first solution at an 80 ° C oil bath cope, stir mixed to moisture, dried to a temperature temperature, transferred to an air blowing tank for 12 h, and placed the resulting product in a 500 ° C muffle furnace 4h to get PD-MOO x Precursor.
[0034] (3) PD-MOO x The precursor was grounded to the quartz tube, which was carbonized in the vertical tube furnace, and 150 ml / min methane / hydrogen mixture (in which the hydrogen gas had a flow rate of 120 ml / min, the flow rate of methane was 30 mL ...
Embodiment 2
[0038] A PD doping for naphthalene hydrogenation and a silicon carbide catalyst regulated by Mo hole coordination, prepared according to the following preparation step:
[0039] (1) 3.45 g of four hydrated molybdate is dissolved in 30 ml deionized water, and then the PD accounts for 0.3% of the total mass of MOC + PD in the final resulting carbonized molybdenum catalyst, and the palladium nitrate solution is added, stirred at 30 ° C. 4h to obtain the first solution.
[0040] (2) Place the first solution at an 80 ° C oil bath cope, stir mixed to moisture, dried to a temperature temperature, transferred to an air blowing tank for 12 h, and placed the resulting product in a 500 ° C muffle furnace 4h to get PD-MOO x Precursor.
[0041] (3) PD-MOO x The precursor was grounded to the quartz tube, which was carbonized in the vertical tube furnace, and 150 ml / min methane / hydrogen mixture (in which the hydrogen gas had a flow rate of 120 ml / min, the flow rate of methane was 30 mL / m...
Embodiment 3
[0043] A PD doping for naphthalene hydrogenation and a silicon carbide catalyst regulated by Mo hole coordination, prepared according to the following preparation step:
[0044] (1) Take 3.45 g of four hydrated molybdate is dissolved in 30 ml deionized water, and then the PD accounts for 0.1% of the total mass of MOC + PD in the final resulting carbonized molybdenum catalyst, adding PD according to the calculation of ammonium molybdism : (PD + MOC) The mass ratio of 0.1% is a palladium solution, stirred at 30 ° C for 4 h, resulting in the first solution.
[0045] (2) Place the first solution at an 80 ° C oil bath cope, stir mixed to moisture, dried to a temperature temperature, transferred to an air blowing tank for 12 h, and placed the resulting product in a 500 ° C muffle furnace 4h to get PD-MOO x Precursor.
[0046] (3) PD-MOO x The precursor was grounded to the quartz tube, which was carbonized in the vertical tube furnace, and 150 ml / min methane / hydrogen mixture (in whic...
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