Catalyst for methanation, and preparation method and application thereof
A catalyst, methanation technology, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc. Effect of good resistance, good thermal stability
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[0038] Example 1
[0039] This example is used to illustrate the preparation of the catalyst of the present invention.
[0040] 140g Ni(NO 3 ) 2 , 16.4g La(NO 3 ) 3 Dissolve in water, add 31.5g Al 2 O 3 , It is made into powder by mixing and impregnation, and after proper crushing, it is rolled into small spherical particles with a particle size of about 4mm as the core of the catalyst.
[0041] Add 6.2g Sr(NO 3 ) 2 , 1.1g NH 4 VO 3 After being dissolved in water, the above-mentioned inner core was saturated immersed, dried at 90°C for 12 hours, and calcined at 400°C for 6 hours to serve as an intermediate layer.
[0042] The Al pre-baked at 800~900℃ for 4 hours 2 O 3 The powder is rolled on the surface of the above-mentioned intermediate layer as a shell, that is, a catalyst with a particle diameter of about 5 mm is made.
[0043] After measurement and conversion, in the catalyst, Ni element accounts for 44.58wt%, La element accounts for 6.95wt%, Sr and V elements together account for...
Example Embodiment
[0051] Example 2
[0052] This example is used to illustrate the preparation of the catalyst of the present invention.
[0053] Put 124.8g Ni(NO 3 ) 2 , 16.4g La(NO 3 ) 3 Dissolve in water, add 35.5g Al 2 O 3 , It is made into powder by mixing and impregnation, and after proper crushing, it is rolled into small spherical particles with a particle size of about 4mm as the core of the catalyst.
[0054] Add 6.2g Sr(NO 3 ) 2 , 1.1g NH 4 VO 3 , 4.1g Ca(NO 3 ) 2 , 2.3g Cr(NO 3 ) 3 After being dissolved in water, the inner core was saturated immersed, dried at 120°C for 8 hours, and calcined at 600°C for 4 hours to serve as an intermediate layer.
[0055] The Al pre-baked at 800~900℃ for 4 hours 2 O 3 The powder is rolled on the surface of the above-mentioned intermediate layer as a shell, that is, a catalyst with a particle diameter of about 5 mm is made.
[0056] After measurement and conversion, in this catalyst, Ni element accounts for 40.64wt%, La element accounts for 7.11wt%, and Sr, V...
Example Embodiment
[0064] Example 3
[0065] This example is used to illustrate the preparation of the catalyst of the present invention.
[0066] Put 124.8g Ni(NO 3 ) 2 , 14g Ce(NO 3 ) 3 Dissolve in water, add 36.1g Al 2 O 3 , It is made into powder by mixing and impregnating, properly crushed and rolled into small spherical particles with a particle size of about 4mm, which serve as the core of the catalyst.
[0067] Add 6.2g Sr(NO 3 ) 2 , 1.1g NH 4 VO 3 , 4.1g Ca(NO 3 ) 2 , 2.3g Cr(NO 3 ) 3 After being dissolved in water, the inner core was saturated immersed, dried at 120°C for 8 hours, and calcined at 600°C for 4 hours to serve as an intermediate layer.
[0068] The Al pre-baked at 800~900℃ for 4 hours 2 O 3 The powder is rolled on the surface of the above-mentioned intermediate layer as a shell, that is, a catalyst with a particle diameter of about 5 mm is made.
[0069] After measurement and conversion, in this catalyst, Ni element accounts for 40.87wt%, La element accounts for 6.13wt%, and Sr, V,...
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