Nickel-based catalyst for ammonia decomposition and preparation method and application thereof
A nickel-based catalyst, ammonia decomposition technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of poor activity, easy sintering and growth of nickel grains and other problems, to achieve the effect of improving activity, cheap raw materials and low preparation cost
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Embodiment 1
[0024] Embodiment 1, a kind of nickel base catalyst that is used for ammonia decomposition, preparation process is as follows:
[0025] 4.96gNi(NO 3 ) 2 ·6H 2 O and 0.31g La(NO 3 ) 3 ·6H 2 O was dissolved in 20ml of water to obtain an impregnation solution, and then 8.9g of γ-alumina (specific surface area 220-250m 2 g -1 ) to fully mix and impregnate until the impregnating solution is completely absorbed by γ-alumina. Then dry at 120°C for 5 hours, then bake at 400°C to 450°C for 4 hours, and cool down to room temperature naturally to obtain the catalyst to be activated.
[0026] Put 100 g of the catalyst to be activated above into a stainless steel reaction tube with an inner diameter of Φ=7.5 mm and a length of 700 mm for activation treatment. The activation treatment time is 24 hours in total. The ventilation time, ventilation flow rate and heating temperature of different activation time periods are shown in Table 1 shown.
[0027] Table 1. Catalyst activation co...
Embodiment 2
[0032] Embodiment 2, with 4.96gNi (NO 3 ) 2 ·6H 2 O and 1.56g La(NO 3 ) 3 ·6H 2 O was dissolved in 20ml of water to obtain an impregnation solution, and then 8.5g of γ-alumina (specific surface area 220-250m 2 g -1 ) to fully mix and impregnate until the impregnating solution is completely absorbed by γ-alumina. All the other contents are the same as in Example 1.
[0033] The obtained nickel-based catalyst contained 10% Ni and 5% La.
Embodiment 3
[0034] Embodiment 3, with 4.96gNi (NO 3 ) 2 ·6H 2 O and 3.12g La(NO 3 ) 3 ·6H 2 O was dissolved in 20ml of water to obtain an impregnation solution, and then 8.0g of γ-alumina (specific surface area 220-250m 2 g -1 ) to fully mix and impregnate until the impregnating solution is completely absorbed by γ-alumina. All the other contents are the same as in Example 1.
[0035] The obtained nickel-based catalyst contained 10% Ni and 10% La.
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