Preparation method of porous rod-shaped spinel structured catalyst

[0026] The chemical formula is CuCr 2 o 4 Catalyst preparation

[0027] A kind of CuCr for purifying diesel vehicle exhaust PM 2 o 4 Spinel catalyst, composed of copper element with positive divalent value, spinel AB 2 o 4 In the A position of the structure, the chromium element constitutes the B position, wherein: the molar ratio of the copper element, the chromium element and the oxygen element in the catalyst is 1:2:4. Through crystal phase analysis, the spinel structure in the catalyst accounts for 99%.

[0028] 1) Prepare a copper nitrate salt solution with an ion concentration of 0.5 mol / L and a chromium nitrate salt solution with an ion concentration of 1.0 mol / L with deionized water;

[0029] The prepared catalyst for eliminating PM from diesel vehicle exhaust is a multi-metal oxide with a nanorod-like spinel structure.

[0030] 2) Measure 30ml of copper nitrate salt solution and 30ml of chromium nitrate salt solution, and mix them evenly under magnetic stirring...

[0038] The chemical formula is ZnCr 2 o 4 Catalyst preparation

[0039] A kind of ZnCr for purifying diesel vehicle exhaust PM 2 o 4 Spinel catalyst, composed of spinel AB with positive divalent zinc element 2 o 4In the A position of the structure, the chromium element constitutes the B position, wherein: the molar ratio of the zinc element, the chromium element and the oxygen element in the catalyst is 1:2:4. Through crystal phase analysis, the spinel structure in the catalyst accounts for 99%.

[0040] 1) Prepare a zinc chloride salt solution with an ion concentration of 0.5 mol / L and a chromium chloride salt solution with an ion concentration of 1.0 mol / L with deionized water;

[0041] The prepared catalyst for eliminating PM from diesel vehicle exhaust is a multi-metal oxide with a nanorod-like spinel structure.

[0042] 2) Measure 30ml of zinc chloride salt solution and 30ml of chromium chloride salt solution, and mix them evenly under magnetic stirring to obtain a...

[0050] The chemical formula is MnCr 2 o 4 Catalyst preparation

[0051] A kind of MnCr for purifying diesel vehicle exhaust PM 2 o 4 Spinel catalyst, composed of spinel AB, which is composed of positive divalent manganese 2 o 4 In the A position of the structure, the chromium element constitutes the B position, wherein: the molar ratio of the manganese element, the chromium element and the oxygen element in the catalyst is 1:2:4. Through crystal phase analysis, the spinel structure in the catalyst accounts for 99%.

[0052] 1) Prepare manganese sulfate salt solution with an ion concentration of 0.25 mol / L and chromium sulfate salt solution with an ion concentration of 0.5 mol / L with deionized water;

[0053] The prepared catalyst for eliminating PM from diesel vehicle exhaust is a multi-metal oxide with a nanorod-like spinel structure.

[0054] 2) Take 30ml of manganese sulfate solution and 30ml of chromium sulfate solution respectively, and mix them evenly under magnet...