Magnesium-titanium perovskite type nickel-based catalyst for hydrogen production by autothermal reforming of acetic acid
An autothermal reforming and catalyst technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, hydrogen, etc., can solve the problems of poor stability, low activity, catalyst deactivation, etc. The effect of stable activity, inhibition of acetone, and efficient conversion
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example 1
[0034] Weigh 2.355g of Ni(NO 3 ) 2 ·6H 2 O, 21.666g of Mg(NO 3 ) 2 ·6H 2 O add an appropriate amount of deionized water, fully stir until dissolved to obtain 1# solution; then weigh citric acid with a total molar number of metal cations of 1:1, dissolve it in deionized water, and stir to obtain 2# solution, weigh and metal cation Ethylene glycol with a total molar number of cations of 1:1, to obtain 3# solution; slowly drop 2# solution into 3# solution, stir until the mixture is uniform, and slowly add the mixed solution dropwise under the condition of 70°C water bath Put it into the 1# solution, stir until it becomes a gel, take it out and place it in an oven at 100-110°C to dry for 10-15h to obtain a catalyst precursor; put the sample in a tube furnace, and raise the temperature to 700°C at a rate of 10°C / min ℃, and after calcination at this temperature for 4 hours, the catalyst N85M was obtained. The molar composition of the catalyst is (NiO) 0.08 (MgO) 0.85 , by we...
Embodiment 1
[0038] Weigh 2.352g of Ni (NO 3 ) 2 ·6H 2 O, 2.593g of Mg(NO 3 ) 2 ·6H 2 O add an appropriate amount of deionized water, fully stir until dissolved; then weigh 12.735g of butyl titanate solution into the beaker equipped with nitrate solution, stir evenly to obtain 1# solution; follow-up steps are the same as in reference example 1, put the sample Put it into a tube furnace, raise it to 700°C with a heating rate of 10°C / min, and obtain the catalyst N10MT of the present invention after roasting at this temperature for 4 hours, forming a (Mg, Ni)TiO 3 Perovskite-like structure and rutile phase TiO 2 The mesoporous catalyst, the phase composition is as attached figure 1 As shown, the pore size distribution is shown in the attached figure 2 shown. The molar composition of the catalyst is (NiO) 0.08 (MgO) 0.1 (TiO 2 ) 0.37 , by weight percentage of oxides: nickel oxide is 15.0%, magnesium oxide is 10.0%, and titanium oxide is 75.0%.
[0039] The activity of the N10MT c...
Embodiment 2
[0041] Weigh 2.330g of Ni(NO 3 ) 2 ·6H 2 O, 1.284g of Mg(NO 3 ) 2 ·6H 2 O add an appropriate amount of deionized water, fully stir until dissolved; then weigh 13.636g of butyl titanate solution into the beaker equipped with nitrate solution, stir evenly to obtain 1# solution; follow-up steps are the same as in reference example 1, put the sample Put it into the tube furnace, rise to 700°C with a heating rate of 10°C / min, and obtain the catalyst N5MT of the present invention after roasting at this temperature for 4 hours, and the catalyst forms (Mg, Ni)TiO 3 Perovskite-like structure, the typical structure is as attached figure 1 shown. The molar composition of the catalyst is (NiO) 0.08 (MgO) 0.05 (TiO 2 ) 0.4 , by weight percentage of oxides: nickel oxide is 15.0%, magnesium oxide is 5.0%, and titanium oxide is 80.0%.
[0042] The activity of the N5MT catalyst was investigated by the autothermal reforming reaction of acetic acid. The reduction temperature was 700°C...
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