Cu/Al2O3 catalyst and preparation method thereof as well as method for catalyzing hydrolysis of glycerol
A technology of catalyst catalyzing glycerol and catalyst, which is applied in catalyst activation/preparation, oxidative preparation of carbonyl compounds, physical/chemical process catalyst, etc., can solve the problems of complex method process, low product yield, not in line with the development direction of green chemical industry, etc. Achieve the effect of easy product, simple process requirements, good catalytic activity and stability
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Embodiment 1
[0014] Catalyst preparation:
[0015] Cu / Al 2 o 3 (5:100) The catalyst was prepared by an isometric impregnation method: first the support Al was measured 2 o 3 the impregnation volume. According to the composition requirements of the catalyst, the corresponding amount of raw materials were weighed as Cu(NO 3 ) 2 ·3H 2 O and Al 2 o 3 , equal-volume impregnation, stirring is required during the process to make copper nitrate solution and Al 2 o 3 Thoroughly and evenly impregnated. The samples were dried at 120 °C for 12 h and calcined at 450 °C for 2 h to prepare the catalyst precursor. The catalyst precursor was pressed into tablets under 14 MPa, and sieved into 20-40 mesh particles.
[0016] Catalyst activation pretreatment:
[0017] The catalyst described in the above technical scheme must be activated and pretreated before use. The method is: from room temperature to 240 °C at 1.5 °C / min, while using H 2 -N 2 Mixed gas (1:9 / V:V) for purging reduction. Subseq...
Embodiment 2
[0026] With embodiment 1, but change Cu / Al in the catalyst 2 o 3 The ratio is respectively 10g:100g, and the results of 20g:100g are shown in Table 2 and Table 3 respectively.
[0027] Table 2 Cu / Al at different reaction temperatures under normal pressure 2 O 3 （10 g :100 g ) gas-phase catalytic hydrogenolysis of glycerol
[0028] Reaction product selectivity and conversion of raw glycerol
[0029]
[0030] Table 3 Cu / Al at different reaction temperatures under normal pressure 2 O 3 （20 g :100 g ) gas-phase catalytic hydrogenolysis of glycerol
[0031] Reaction product selectivity and conversion of raw glycerol
[0032]
[0033] From Table 1 to Table 3, it can be seen that Cu / Al with different compositions 2 o 3 The series of catalysts can effectively catalyze the gas-phase hydrogenolysis of glycerol. Under normal pressure, gas-phase reaction conditions, and at different temperatures, the conversion rate of glycerin can be close to 10...
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