Metal carrier type hydrogen-eliminating catalyst and preparation process thereof
A hydrogen-eliminating catalyst and catalyst technology are applied in the field of confined spaces and can solve the problems of high-temperature sintering of catalysts, low catalyst strength, and easy breakage.
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example 1
[0024] Take 5 pieces of 30×30mm spray Al 2 o 3 The stainless steel mesh is fully washed with detergent, baked in an oven at 100°C for 4 hours, and placed in a desiccator for later use.
[0025] Measure the concentration of 0.1gPd / ml of H 2 PdCl 4 Solution 5ml, 0.1gPt / ml of H 2 PtCl 6 Pour 10ml of the solution into an incubator, add 0.12gCe / ml of Ce(NO 3 ) 3 After 3ml of the solution, the metal support was put in for impregnation, stirred properly, and dried at 120°C for 2 hours. Then bake at 450°C for 3h, and then use hydrogen (space velocity 1000h -1 ) at 450° C. for 5 hours, cooled naturally to room temperature, and the finished catalyst was taken out to be uniform dark gray.
[0026] In the catalyst activity evaluation process, 5 pieces of catalyst samples were loaded, and the space velocity was 20,000 hours at normal temperature and pressure. -1 1. Under the condition that the hydrogen concentration is 2%, the hydrogen elimination activity is evaluated, and the hy...
example 2
[0028] Take 5 pieces of 30×30mm spray Al 2 o 3 The stainless steel mesh is fully washed with detergent, baked in an oven at 100°C for 4 hours, and placed in a desiccator for later use.
[0029] Measure the concentration of 0.1gPd / ml of H 2 PdCl 4 Solution 5ml, concentration of 0.1gPt / ml of H 2 PtCl 6 Solution 6ml and 0.15gAg / ml AgNO 3 Pour 4ml of the solution into an incubator, add 0.12gCe / ml of La(NO 3 ) 3 After 3ml of the solution, the metal support was put into for impregnation, stirred properly, and dried at 100°C for 2 hours. Then it was calcined at 600°C for 2h, then reduced with hydrogen (space velocity 1000h-1) at 400°C for 5h, cooled naturally to room temperature, and the finished catalyst was light gray when taken out.
[0030] In the catalyst activity evaluation process, 5 pieces of catalyst samples were loaded, and the space velocity was 20,000 hours at normal temperature and pressure. -1 1. Under the condition that the hydrogen concentration is 2%, the hydr...
example 3
[0032] Take 5 pieces of 30×30mm stainless steel mesh, wash them thoroughly with detergent, bake them in an oven at 100°C for 4 hours, and put them in a desiccator for later use.
[0033] Measure the concentration of 0.12gPd / ml H 2 PdCl 4 Solution 3ml, concentration of 0.07gPt / ml of H 2 PtCl 6 Solution 2ml and 0.19gAg / ml AgNO 3 Solution 1ml, mix well and stir evenly, then add a small amount of binder and 0.2gK 2 CO 3 , fully stirred evenly to make a coating liquid.
[0034] Brush the coating solution onto the spare stainless steel mesh, place it in an oven to dry at 120°C for 15 minutes, then bake it at 580°C for 2 hours, and then use hydrogen (space velocity 1000 hours) -1 ) was reduced at 460°C for 5 hours, cooled naturally to room temperature, and the finished catalyst was dark gray when taken out.
[0035] In the catalyst activity evaluation process, 5 pieces of catalyst samples were loaded, and the space velocity was 20,000 hours at normal temperature and pressure. ...
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Abstract
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