A kind of co-ce-cu catalyst, preparation method and application in carbon dioxide methanation reaction
A co-ce-cu, 1.co-ce-cu technology, applied in the field of catalysts, can solve problems such as low CO by-products, and achieve the effect of improving reaction activity, deposition and loading
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Embodiment 1
[0023] The preparation method of Co-Ce-Cu catalyst comprises the steps:
[0024] Step 1, in parts by weight, mix 30 parts of sodium silicate, 3 parts of sodium sulfate, and 400 parts of water evenly, after heating up to 70°C, add 5wt% acetic acid aqueous solution dropwise to make the pH between 9, After letting it cool, carry out the first aging for 2 hours; then add 5wt% acetic acid aqueous solution dropwise to keep the pH at 4, then carry out the second aging for 3 hours, then add 30 parts of hydroxy silicone oil, stir evenly, and carry out the third aging After 5 h, the sol containing the modified nano-silica carrier was obtained;
[0025] In the second step, in the sol obtained in the first step, add 10 parts of cobalt nitrate, 4 parts of cerium chloride and 5 parts of copper nitrate, mix well, and slowly add NH 4 OH aqueous solution and (NH 4 ) 2 CO 3 For the mixed solution of aqueous solution, adjust the pH value of the solution to 9, slowly add it dropwise and heat ...
Embodiment 2
[0029] The preparation method of Co-Ce-Cu catalyst comprises the steps:
[0030] Step 1, in parts by weight, mix 40 parts of sodium silicate, 5 parts of sodium sulfate, and 500 parts of water evenly, after heating up to 90°C, add 10wt% acetic acid aqueous solution dropwise to make the pH between 10, After letting it cool, carry out the first aging for 4 hours; then add 10wt% acetic acid aqueous solution dropwise to make the pH at 5, then carry out the second aging for 5 hours, then add 35 parts of hydroxyl silicone oil, stir evenly, and carry out the third aging After 15 h, the sol containing the modified nano-silica carrier was obtained;
[0031] In the second step, in the sol obtained in the first step, add 12 parts of cobalt nitrate, 6 parts of cerium chloride and 8 parts of copper nitrate, mix well, and slowly add NH 4 OH aqueous solution and (NH 4 ) 2 CO 3 For the mixed solution of aqueous solution, adjust the pH value of the solution to 10, slowly add it dropwise and...
Embodiment 3
[0035] The preparation method of Co-Ce-Cu catalyst comprises the steps:
[0036] Step 1, in parts by weight, mix 35 parts of sodium silicate, 4 parts of sodium sulfate, and 450 parts of water evenly, after heating up to 75°C, add 7wt% acetic acid aqueous solution dropwise to make the pH between 9, After letting it cool, carry out the first aging for 3 hours; then add 7wt% acetic acid aqueous solution dropwise to make the pH at 4, then carry out the second aging for 4 hours, then add 32 parts of hydroxyl silicone oil, stir evenly, and carry out the third aging After 12 h, the sol containing the modified nano-silica carrier was obtained;
[0037] In the second step, in the sol obtained in the first step, add 11 parts of cobalt nitrate, 5 parts of cerium chloride and 6 parts of copper nitrate, mix well, and slowly add NH 4 OH aqueous solution and (NH 4 ) 2 CO 3For the mixed solution of aqueous solution, adjust the pH value of the solution to 9, slowly add it dropwise and heat...
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