Method for preparing alumina-supported perovskite-type oxide composition, alumina-supported perovskite-type oxide composition and use thereof
An alumina-supported, perovskite-type technology, used in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, separation methods, etc.
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Embodiment 1
[0078] Example 1 - Perovskite La with 20 wt% 0,5 Sr 0,5 Fe 0,5 Ti 0,5 O 3 of composite materials
[0079] Prepared with 10 wt % La by mixing an aqueous lanthanum acetate solution with a 5 wt % boehmite aqueous suspension 2 O 3 gamma alumina. The mixture was then spray dried and calcined at 500°C for 1 hour.
[0080] La-doped alumina was impregnated with a mixed solution of strontium acetate, ferric ammonium citrate, and Tyzor LA (titanium solution) by incipient wetness impregnation to achieve 4.8 wt% SrO, 3.8 wt% Fe after calcination 2 O 3 and 3.8 wt% TiO 2 load amount. The products were calcined at 850°C for 3 hours and 700°C for 4 hours, respectively.
[0081] figure 1 The X-ray diffraction patterns of the material obtained by Example 1 after calcination at 850°C for 3 hours and 700°C for 4 hours are shown.
Embodiment 2
[0082] Example 2 - Perovskite La with 20 wt% 0,5 Sr 0,5 Fe 0,5 Zr 0,5 O 3 of composite materials
[0083] Prepared by mixing an aqueous lanthanum acetate solution with an aqueous suspension of 5 wt % boehmite containing 7.8 wt % La 2 O 3 gamma alumina. The mixture was then spray dried and calcined at 500°C for 1 hour.
[0084] Doped alumina was impregnated with a mixed solution of ferric ammonium citrate, zirconium acetate, and strontium acetate by incipient wetness impregnation to achieve 3.4 wt% Fe 2 O 3 , 5.3 wt% ZrO 2 and a loading of 4.4 wt% SrO. The products were calcined at 850°C for 3 hours and 700°C for 4 hours, respectively.
[0085] exist figure 2 In , the X-ray diffraction patterns of the material obtained after calcination at 850°C for 3 hours and 700°C for 4 hours are shown.
Embodiment 3
[0100] Example 3 - Perovskite LaFeO with 10 wt% 3 of composite materials
[0101] Prepared by mixing an aqueous lanthanum acetate solution with an aqueous suspension of 5 wt % boehmite containing 11.7 wt % La 2 O 3 gamma alumina. The mixture was then spray dried and calcined at 500°C for 1 hour.
[0102] Impregnation of doped alumina with a solution of ferric ammonium citrate by incipient wetness impregnation to achieve 3.3 wt% Fe 2 O 3 load amount. The products were calcined at 850°C for 3 hours and 700°C for 4 hours, respectively.
[0103] exist Figure 5 In , the X-ray diffraction pattern of the material obtained after calcination at 700°C for 4 hours is shown.
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