A light-weight, high-strength and wide-temperature shaped denitration catalyst
A denitration catalyst and catalyst technology, which are applied in molecular sieve catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of toxic components of vanadium-titanium-based forming catalysts, narrow denitration activity temperature window, etc., and achieve a low expansion coefficient. , The effect of improving mechanical strength and reducing cost
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Embodiment 1
[0036] A light-weight, high-strength, wide-temperature, high-efficiency vanadium-free shaped denitration catalyst, the preparation method comprising the following steps:
[0037] 1) take by weighing 300g cordierite powder and 200g CuY molecular sieve, then take by weighing 20g carboxymethyl cellulose, 10g cyclodextrin, 15g maltose, 200g silica sol, 25g boric acid, 40g glass fiber silk and 30g oleic acid respectively; The above powdered raw materials are put into a mixer for dry mixing for about 0.5 to 1 hour, and the rotation speed is 60 rpm, and then oleic acid, silica sol and 150 mL of distilled water are added for wet mixing. Repeatedly practice the mud for about 0.5 to 1 h by the vacuum mud mixer until the materials are evenly mixed, and the mixed mud is obtained;
[0038] 2) Honeycomb extrusion molding
[0039] Select a 6*6 square hole die, install it on the extruder barrel port as required, then put the mixed mud obtained in step 1) into the abrasive tool in the extrude...
Embodiment 2
[0043] A light-weight, high-strength, wide-temperature, high-efficiency vanadium-free molding denitration catalyst, the preparation method of which is roughly the same as that of Example 1, except that 300 g of cordierite powder in the molding raw material is replaced by 150 g of cordierite powder and 150 g of montmorillonite soil, namely The molding main body is 1:1 cordierite powder and montmorillonite soil; the obtained molding catalyst is denoted as 3#.
Embodiment 3
[0045] A light-weight, high-strength, wide-temperature, high-efficiency vanadium-free molding denitration catalyst, the preparation method of which is roughly the same as that in Example 1, except that 300 g of cordierite powder in the molding raw material is replaced by 150 g of cordierite powder and 150 g of attapulgite, i.e., molding The main body is 1:1 cordierite powder and attapulgite; the obtained shaped catalyst is recorded as 4#.
[0046] The shaped catalysts and pure CuY molecular sieves obtained in Examples 1-3 were placed in a fixed-bed SCR reactor for denitration activity and anti-SO 2 Performance evaluation: The simulated flue gas composition is controlled by a mass flow meter to be 714ppm NO, 804ppm NH 3 , 3.1vol%O 2 , 100~300ppm SO 2 , N 2 For the equilibrium gas, the test temperature range is 80-400 ° C. The test results of the denitration rate of the shaped catalyst obtained in each embodiment and the pure CuY molecular sieve are shown in figure 1 , the r...
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