Flame-retardant porous matrix supported non-noble metal catalyst as well as preparation method and application thereof
A porous matrix, non-precious metal technology, applied in the direction of catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, combustion method, etc., can solve the problem of increasing uncontrollable factors in the reaction and increasing the pressure drop of the fixed bed layer , affecting catalyst life and other issues, to achieve excellent stability, long service life, and good hydrothermal properties
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[0053] The present invention also provides a method for preparing a flame-retardant porous matrix-supported non-precious metal catalyst, which is characterized by comprising the following steps:
[0054](1) mixing and contacting at least one original matrix selected from attapulgite and kaolin, at least one inorganic material selected from inorganic porous solids, a peptizer, and water to make a plastic mixed contact body; wherein, relative to The total amount of the original matrix and the inorganic material, the content of the original matrix is 10-99.5 mass %, preferably 20-99 mass %, the inorganic material content is 0.5-90 mass %, preferably 1-80 mass %, More preferably 5-80 mass %, more preferably 8-70 mass %, still more preferably the remainder;
[0055] (2) optionally subjecting the plastic mixed contact body to molding to obtain a porous matrix blank;
[0056] (3) calcining the mixed contact body of step (1) or the porous substrate blank of step (2) to obtain a fla...
Embodiment 1
[0115] Mix attapulgite, 13X molecular sieve, 65% mass concentration of nitric acid, methylcellulose, and magnesium stearate in a kneader in a mass ratio of 10:4:0.02:0.2:0.001, and stir evenly, add an appropriate amount of water, Knead into a plastic mixed contact body, put the contact body into an extruder, and extrude it under the conditions of a temperature of 25 ° C and a pressure of 5 MPa to make a square honeycomb body, a square honeycomb body. The length and height of the four bottom sides are respectively 80 cm and 100 cm, and the honeycomb green body is calcined at 300° C. for 2 hours under air conditions to obtain a flame-retardant honeycomb matrix A. The Co content of each cubic honeycomb substrate A is 160kg / m 3 The polyethylene glycol-400 aqueous solution of cobalt nitrate is configured in the proportion of 3 , Mo content is 15kg / m 3 The aqueous solution of cerium nitrate and ammonium molybdate was prepared in the proportion of cerium nitrate and ammonium molybd...
Embodiment 2
[0117] Mix attapulgite, kaolin, Y molecular sieve, 65% mass concentration of nitric acid, methylcellulose, and magnesium stearate in a kneader in a mass ratio of 8:2:2:0.02:0.2:0.03, Add an appropriate amount of water, knead into a plastic mixed contact body, put the contact body into an extruder, and extrude it at a temperature of 25 ° C and a pressure of 5 MPa to make a blank with square honeycomb holes. The length and height of the four bottom sides of the green body are respectively 80 cm and 100 cm, and the honeycomb green body is calcined at 500° C. for 2 hours under air conditions to obtain a flame-retardant honeycomb matrix B. According to the content of Co on each cubic honeycomb matrix B is 130kg / m 3 The proportion of citric acid aqueous solution of cobalt nitrate is configured, wherein the mass ratio of citric acid and cobalt nitrate is 0.1:1, and the Ce content on each cubic honeycomb matrix B is 40kg / m 3 , Mn content is 29kg / m 3 The aqueous solution of cerium ni...
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