Determination method of denitration rate of nano titanium dioxide powder for flue gas denitration catalyst
A technology of nano-titanium dioxide and denitration catalyst is applied in the field of preparation of nano-titanium dioxide, which can solve the problems of inability to establish connection between denitrification catalysts and denitration activities, and achieve the effects of stable test results, easy operation and simple test.
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Embodiment 1
[0017] (1) Powder prefabrication: Take two 10g samples from different sources with a specific surface area of 82.56m 2 / g denitrification catalyst with nano-titanium dioxide, add 0.14g ammonium metavanadate, 0.32g ammonium heptamolybdate, 0.2g triethanolamine, 50ml distilled water to it respectively, put it into a constant temperature water bath with stirring, set the temperature at 70°C, Stir at constant temperature until it is semi-dry to obtain two parts of semi-dry materials; (2) Powder calcination: transfer the above two parts of semi-dry materials to a crucible, put them in a 500°C oven for calcination for 1 hour, and obtain two parts of calcined powder Materials; (3) Prefabrication of test samples: Cool the above two calcined materials to room temperature, put them into a mortar, add about 1% PEO, CMC, grind them, slowly add distilled water and grind them carefully until the materials are solidified. (4) Test sample pressing: put the above two agglomerated samples int...
Embodiment 2
[0020] Example 2: The difference from Example 1 is that the surface area of nano-titanium dioxide for denitration catalyst in step (1) is 98.14m 2 / g. The test results are shown in Table 2:
[0021]
[0022] Tests 2-1, 2-2, and 2-3 in Table 2 have two groups, representing two different sources of nano-titanium dioxide for denitration catalysts. It can be seen that under the same sample length, the out-of-stock rate and unit length The out-of-stock rate of the samples is different, indicating that the performance of the two different sources of nano-titanium dioxide for denitration catalysts has an impact on the out-of-stock rate of the catalyst. Through data comparison, it can be seen which source of nano-titanium dioxide for denitration catalyst has better performance. Compared with the test results of Example 1, it can be found that the larger the specific surface area, the higher the denitrification rate of the catalyst.
Embodiment 3
[0023] Embodiment 3: The difference with Embodiment 1 is that 0.16g ammonium metavanadate is added in the step (1), and the test results are shown in Table 3:
[0024]
[0025] Tests 3-1, 3-2, and 3-3 in Table 3 have two groups respectively, representing two different sources of nano-titanium dioxide for denitration catalysts. It can be seen that in the case of the same sample length, the out-of-stock rate and unit length The out-of-stock rate of the samples is different, indicating that the performance of the two different sources of nano-titanium dioxide for denitration catalysts has an impact on the out-of-stock rate of the catalyst. Through data comparison, it can be seen which source of nano-titanium dioxide for denitration catalyst has better performance. Compared with the test results of Example 1, it can be found that the higher the loading of active components, the higher the denitration rate of the catalyst.
[0026] In the present invention, the nano-titanium dio...
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