Flame-retardant hydrophobic porous matrix supported non-noble metal catalyst as well as preparation method and application thereof
A porous matrix, non-precious metal technology, used in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalysts, combustion methods, etc. problems such as increased pressure drop, to achieve the effects of excellent stability, long service life and low cost
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[0067] The present invention also provides a method for preparing a flame-retardant hydrophobic porous matrix-supported non-precious metal catalyst, which is characterized by comprising the following steps:
[0068] (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 %, and the inorganic material content is 0.5-90 mass %, preferably 1-80 mass % %, more preferably 5~80% by mass, more preferably 8~70% by mass, still more preferably the remainder;
[0069] (2) optionally subjecting the plastic mixed contact body to molding to obtain a porous matrix blank;
[0070] (3) calcining the mixed contact body in the above step (1) or the porous substrate ...
Embodiment 1
[0148] Mix attapulgite, 13X molecular sieve, 65% mass concentration of nitric acid, methyl cellulose, and magnesium stearate in a kneader in a ratio of 10:3:0.02:0.2:0.001 by mass, and 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 pressure of 5 MPa and a temperature of 25 ° C to make a square honeycomb body, and four square honeycomb bodies. The length and height of the bottom side are 80cm and 100cm respectively, and the honeycomb green body is in N 2 Roast at 300 °C for 2 hours under the conditions, and after cooling to room temperature, transfer the cooled embryos to ethyl silicate with a mass concentration of 1% according to the ratio of the mass ratio of the cooled embryos to the modified solution of 20:1. After soaking in the ethanol solution for 1 hour, take it out, and bake it at 400 °C for 4 hours to obtain a flame-retardant and hydrophobic honeycomb matrix A...
Embodiment 2
[0150]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 under the conditions of 5 MPa and a temperature of 25 ° C to make a square honeycomb body and a square honeycomb body. The length and height of the four bottom sides are 80cm and 100cm respectively, and the honeycomb green body is in N 2 Roasting at 300 °C for 2 hours under the conditions, after cooling to room temperature, the cooled embryos were transferred to silicon tetrachloride with a mass concentration of 1% at a ratio of 30:1 between the mass of the cooled embryo and the modified solution. After soaking in the toluene solution for 1 hour, take it out, and bake it at 400°C for 4 hours to obtain a flame-retardant and hydrophobic honeycomb matrix B with a contact a...
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Abstract
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