Dehydrogenation catalyst taking Fe-Cr-Al alloy as metal carrier and preparation method thereof
A fe-cr-al, 1.fe-cr-al technology is applied in the field of hydrogen elimination catalyst and its preparation, and can solve the problem of low bonding degree between a catalyst layer and a metal carrier layer, a small specific surface area of the metal carrier, and difficulty in supporting the catalyst layer. problems such as good spalling resistance, optimized preparation methods, and reduced coating or dipping times
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Embodiment 1
[0027] Take 5 pieces of 30×30mm Fe-Cr-Al alloy expanded metal, each piece of metal mesh is 0.6mm thick and weighs 2g, calcined at 950°C for 15 hours, and then put in a mixture of phosphoric acid, chromic acid and deionized water In the liquid, wherein, the mass ratio of each component in the mixed liquid is phosphoric acid: chromic acid: deionized water = 1:3:46, and the Fe-Cr-Al alloy plate is corroded and expanded at room temperature to make the surface mildly oxidized Dimples were formed on the surface of the mesh, which were then ultrasonically cleaned three times in deionized water and then dried at 120 °C; 2 o 3 The surface is coated with a layer of active Al 2 o 3 Sol, baked at 120°C for 2 hours, and fired at 450°C for 3 hours, the obtained γ-Al 2 o 3 The thickness of the porous material layer is 50 μm, and it is placed in a drying oven for use.
[0028] Measure the concentration of 0.1gPd / ml of H 2 PdCl 4 Solution 5ml, 0.1gPt / ml of H 2 PtCl 6 10ml of the solut...
Embodiment 2
[0031]Take 5 pieces of 30×30mm Fe-Cr-Al alloy expanded metal, each piece of metal mesh is 0.6mm thick and weighs 2g, calcined at 1000°C for 10 hours, and then put in a mixture of phosphoric acid, chromic acid and deionized water In the liquid, wherein, the mass ratio of each component in the mixed liquid is phosphoric acid: chromic acid: deionized water = 1:3:46, and the Fe-Cr-Al alloy plate is corroded and expanded at room temperature to make the surface mildly oxidized Dimples were formed on the surface of the mesh, which were then ultrasonically cleaned three times in deionized water and then dried at 120 °C; 2 o 3 The surface is impregnated with a layer of active Al 2 o 3 The sol was baked at 100°C for 3 hours and fired at 500°C for 2.5 hours to obtain γ-Al 2 o 3 The thickness of the porous material layer is 50 μm, and it is placed in a drying oven for use.
[0032] Measure the concentration of 0.1gPd / ml of H 2 PdCl 4 Solution 5ml, 0.1gPt / ml of H 2 PtCl 6 Solution...
Embodiment 3
[0035] Take 5 pieces of 30×30mm Fe-Cr-Al alloy expanded metal, each piece of metal mesh is 0.6mm thick and weighs 2g, calcined at 1050°C for 9 hours, and then put in a mixture of phosphoric acid, chromic acid and deionized water In the liquid, wherein, the mass ratio of each component in the mixed liquid is phosphoric acid: chromic acid: deionized water = 1:3:46, and the Fe-Cr-Al alloy plate is corroded and expanded at room temperature to make the surface mildly oxidized Dimples were formed on the surface of the mesh, which were then ultrasonically cleaned three times in deionized water and then dried at 120 °C; 2 o 3 The surface is coated with a layer of active Al 2 o 3 sol, baked at 80°C for 5 hours, and fired at 400°C for 4 hours, the obtained γ-Al 2 o 3 The thickness of the porous material layer is 50 μm, and it is placed in a drying oven for use.
[0036] Measure the concentration of 0.12gPd / ml H 2 PdCl 4 Solution 3ml, 0.07gPt / ml of H 2 PtCl 6 Solution 2ml and 0....
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