Preparation process of efficient soot removal catalyst and product thereof
A preparation process and catalyst technology, which are applied in the synthesis method of modified composite oxide catalytic new materials and the product field thereof, can solve the problems of low catalytic activity of non-precious metal catalysts, avoid high temperature calcination process, simple preparation process and high efficiency Effect
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Embodiment 1
[0024] Take a certain total concentration of copper nitrate, cerium nitrate, lanthanum nitrate (n Cu :n La =1:1,n Ce :n la =1:1) mixed with water, stirred until completely dissolved; added sodium hydroxide with a concentration of 1mol / L to pH=10, left to age at 60°C to obtain the desired mixture; filtered and washed the above mixture with deionized water , and dry; put the dried catalyst precursor into the low-temperature plasma reactor, and make it in the discharge area; pass into the low-temperature plasma reactor with air at a flow rate of 150mL / min, discharge at 40W After discharging for 2h under power, the desired catalyst material was obtained. The obtained catalyst was subjected to a catalytic combustion experiment simulating soot. The effect of the total concentration of nitrate on the catalytic activity of the catalyst is shown in Table 1.
[0025] Table 1 Effect of the total concentration of nitrate on the catalytic performance of composite oxides
[0026] ...
Embodiment 2
[0028] Get total concentration and be the copper nitrate of certain molar ratio of 1mol / L, cerium nitrate, lanthanum nitrate mix with water, (wherein n Ce :n la (fixed at 1:1) stirring until completely dissolved; adding sodium hydroxide with a concentration of 1mol / L to pH = 10, and aging at 60°C to obtain the desired mixture; filtering and washing the above mixture with deionized water, and drying ; The dried catalyst precursor is put into the low-temperature plasma reactor, and it is placed in the discharge area; In the low-temperature plasma reactor, the air flow rate is 150mL / min, and it is discharged under the discharge power of 40W After 2 h, the desired catalyst material was obtained. The obtained catalyst was subjected to a catalytic combustion experiment simulating soot. The effect of the molar ratio of copper nitrate to lanthanum nitrate on the catalytic activity of the catalyst is shown in Table 2.
[0029] Table 2 The influence of the molar ratio of copper nitra...
Embodiment 3
[0032] Get total concentration and be the copper nitrate of certain molar ratio of 1mol / L, cerium nitrate, lanthanum nitrate mix with water, (wherein n Cu :n la (fixed at 1:1) stirring until completely dissolved; adding sodium hydroxide with a concentration of 1mol / L to pH = 10, and aging at 60°C to obtain the desired mixture; filtering and washing the above mixture with deionized water, and drying ; The dried catalyst precursor is put into the low-temperature plasma reactor, and it is placed in the discharge area; In the low-temperature plasma reactor, the air flow rate is 150mL / min, and it is discharged under the discharge power of 40W After 2 h, the desired catalyst material was obtained. The obtained catalyst was subjected to a catalytic combustion experiment simulating soot. The effect of the molar ratio of cerium nitrate to lanthanum nitrate on the catalytic activity of the catalyst is shown in Table 3.
[0033] Table 3 Effect of cerium nitrate and lanthanum nitrate m...
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