Methanation catalyst and preparation method thereof
A technology of methanation catalyst and auxiliary agent, applied in physical/chemical process catalysts, chemical instruments and methods, chemical elements of heterogeneous catalysts, etc., can solve problems such as poor anti-carbon deposition performance, and achieve good stability and high catalytic Active, high specific surface area effect
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[0027] The invention provides a method for preparing a methanation catalyst, the method comprising:
[0028] (1) template agent and the first alcohol are mixed, obtain solution A; Described template agent is the triblock copolymer shown in following formula (1):
[0029]
[0030] Wherein, each n is independently selected from an integer of 1-5; x and z are each independently selected from an integer of 10-200; y is selected from an integer of 40-100; R is selected from an alkyl group of C1-C6;
[0031] (2) In the mixed solvent of the second alcohol and water, nickel salt, aluminum salt, auxiliary agent metal salt and precipitant are mixed to obtain solution B; the molar ratio of Ni element, Al element and auxiliary agent metal element in solution B is 1: (1-10): (0.1-3);
[0032] (3) Mix solution A and solution B, and carry out hydrothermal reaction, and then wash, dry and roast the product of hydrothermal reaction in sequence.
[0033] In the present invention, specific ...
Embodiment 1
[0075] This example is used to illustrate the methanation catalyst of the present invention and its preparation method.
[0076] (1) 1.3g of P123 (EO 20 -PO 70 -EO 20 , with a molecular weight of about 5800g / mol, purchased from Sigma-Aldrich Company, the same below) was dissolved in 20mL of ethanol to prepare solution A;
[0077] (2) Weigh 4.87g of Ni(NO 3 ) 2 ·6H 2 O (about 17mmol), 22.07g of Al(NO 3 ) 3 9H 2 O (about 59mmol), 3.2g of Mg(NO 3 ) 2 ·6H 2 O (about 12mmol) and 0.66g of La (NO 3 ) 3 ·6H 2 O (about 1.5mmol) was dissolved in 100mL of a mixture of ethanol and water (the volume ratio of ethanol and water was 1:3); then 10.75g of urea was added and stirred to dissolve to obtain solution B;
[0078] (3) Mix solution A and solution B (the molar ratio of P123 / metal cation is about 1 / 400), and stir at 400°C for 3h at a rate of 400rpm; It was reacted at constant temperature for 15 hours at ℃, and then cooled to room temperature naturally; the product was filt...
Embodiment 2
[0081] This example is used to illustrate the methanation catalyst of the present invention and its preparation method.
[0082] (1) Dissolve 1.28g of P123 in 20mL of ethanol to prepare solution A;
[0083] (2) Weigh 5.26g of Ni(NO 3 ) 2 ·6H 2 O (about 18mmol), 22.07g of Al(NO 3 ) 3 9H 2 O (about 59mmol), 2.56g of Mg(NO 3 ) 2 ·6H 2 O (about 10mmol) and 0.66g of La (NO 3 ) 3 ·6H 2 O (about 1.5 mmol) was dissolved in 100 mL of a mixture of ethanol and water (the volume ratio of ethanol and water was 1:3); then 10.61 g of urea was added and stirred to dissolve to obtain solution B;
[0084] (3) Mix solution A and solution B (the molar ratio of P123 / metal cation is about 1 / 400), and stir at 40°C for 3h at a rate of 400rpm; React at constant temperature for 15 hours at ℃, then cool to room temperature naturally; after the product is filtered, wash with absolute ethanol 3 times; then dry at 110℃ for 10h, and then calcined at 500℃ for 4 hours to obtain catalyst N2.
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