Two-stage fluidized bed CO dehydrogenation purification reaction technology and catalysts used
A fluidized bed and catalyst technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, catalyst activation/preparation, etc. The hydrogen reaction space velocity limitation, the reactor is not easy to be over-scaled, etc., to solve the problem of industrial scale-up, high selectivity, and high conversion rate
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Embodiment 1
[0030] Embodiment 1: one, the preparation of lower end fluidized bed catalyst:
[0031] Take by weighing 200g of spherical titanium oxide with a diameter of 2-3mm, prepare the catalyst according to the mass percentage of Pd in the catalyst (referred to as the loading capacity) of the catalyst being 0.8%, and the loading capacity of Ag being 0.8%, and the steps are as follows:
[0032] According to the loading capacity of Pd, 2.67g of palladium chloride and 1.75g of sodium chloride (molar ratio is 1:2) were dissolved in 200ml of deionized water to prepare sodium chloropalladate impregnation solution, and the titanium oxide The carrier was immersed in the impregnating solution for 12 hours, and the solution was filtered out. The carrier impregnated with Pd was dried in an oven at 150°C for 8 hours, washed with deionized water at 50°C for 3 times, and then the sample was dried in an oven at 150°C. 10h;
[0033] 2.55gAgNO 3 Dissolve in 200ml deionized water to prepare silver...
Embodiment 2
[0040] Prepare lower end catalyst PdAgClx / TiO according to the catalyst preparation method of embodiment 1 2 , wherein the loading of Pd is 0.6%, and the loading of Ag is 0.6%.
[0041] According to the catalyst preparation method of Example 1, prepare the top catalyst PdO-Ag 2 O / TiO 2 , wherein the loading of Pd is 0.4%, and the loading of Ag is 0.4%.
[0042] React according to the reaction technique of embodiment 1 and feed gas, in the gas of lower end fluidized bed outlet, H 2 The content is 3650ppm, O 2 The content is 670ppm, and the H in the gas at the outlet of the fluidized bed at the upper end 2 The content is 10ppm.
Embodiment 3
[0044] According to the catalyst preparation method of Example 1, the PdAgCl / TiO with a Pd loading of 0.4% and an Ag loading of 0.4% was obtained 2 Catalyst and PdO-Ag with 0.9% Pd loading and 0.9% Ag loading 2 O / TiO 2 catalyst.
[0045] React according to the reaction technique of embodiment 1 and feed gas, in the gas of lower end fluidized bed outlet, H 2 The content is 4770ppm, O 2 The content is 1670ppm, and the H in the gas at the outlet of the fluidized bed at the upper end 2 The content is 0ppm.
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