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Manganese cerium composite oxide catalyst, its production and use

A technology of composite oxides and catalysts, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of expensive catalysts and great influence on catalyst purification effects, and achieve stability and resistance Good wet performance, low cost, high activity effect

Inactive Publication Date: 2007-09-05
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages are: air humidity has a great influence on the purification effect of the catalyst; the content of platinum or gold is too high, so the catalyst is expensive

Method used

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  • Manganese cerium composite oxide catalyst, its production and use
  • Manganese cerium composite oxide catalyst, its production and use
  • Manganese cerium composite oxide catalyst, its production and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The preparation of catalyst (MP-500): add 100mL deionized water in 500mL round bottom flask, KMnO 4 (0.63g, 4.0mmol) and (NH 4 ) 2 Ce(NO 3 ) 6 (5.48g, 10.0mmol) was added and stirred to dissolve it; take 50mL containing Mn(NO 3 ) 2 ·6H 2 The aqueous solution of O (1.72g, 6.0mol) was added to the above solution under the condition of stirring, and then 2mol / L KOH solution was added to make the pH of the solution=10.5, and the precipitate obtained was stirred and aged for 6 hours at 50°C; The precipitate was filtered, washed three times with deionized water, dried at 110°C for 12 hours, and then calcined in a muffle furnace at 500°C for 6 hours to obtain an MP-500 catalyst with a Mn / Ce molar ratio of 1.0.

[0023] Preparation of the catalyst (CP-500): the metal precursor is Mn(NO 3 ) 2 ·6H 2 O and (NH 4 ) 2 Ce(NO 3 ) 6 , other steps are the same as preparing MP-500 catalyst.

[0024] The preparation of catalyst (SG-500): will (NH 4 ) 2 Ce(NO 3 ) 6 (5.48g...

Embodiment 2

[0027] Except that the calcination temperature of the catalyst is respectively 300, 400, 600 and 700 ° C, the preparation method and steps of the catalyst are the same as the MP-500 catalyst in Example 1, and the catalyst obtained in this way is designated as MP-300, MP-400, MP- 600 and MP-700. In the performance test of the catalyst, the temperature of the catalyst layer was respectively set to 60, 80 and 100° C., and the other steps were the same as in the first embodiment. The results are shown in Table 1.

Embodiment 3

[0029] The preparation of the catalyst is the same as the MP-500 catalyst in Example 1. The stability test of the catalyst was the same as in Example 1, the temperature of the catalyst layer was set at 100° C., and the continuous reaction time was 48 hours. The results are shown in Figure 2.

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Abstract

A composite Mn-Ce oxide catalyst for oxidizing the form-aldehyde into CO2 and H2O is prepared through adding soluble manganese nitrate in the solution of potassium permanganate and cerium ammonium nitrate while stirring, adding potassium hydroxide, stirring to obtain deposit, filtering, washing, drying at 80-120 deg.C and calcining.

Description

technical field [0001] The invention relates to a manganese-cerium composite oxide catalyst. [0002] The present invention also relates to a method for preparing the above-mentioned catalyst. [0003] The invention also relates to the use of the catalysts described above. Background technique [0004] The problem of formaldehyde pollution in indoor and closed systems caused by decoration and decoration has attracted great attention from all walks of life. Formaldehyde is a highly toxic substance. Studies have shown that short-term exposure to formaldehyde can irritate the eyes, nasal cavity and respiratory tract and cause allergic reactions. Long-term exposure can increase the possibility of cancer. Formaldehyde has been identified as carcinogenic and teratogenic substance by the World Health Organization. For this reason, the "Indoor Air Quality Standard" promulgated by China stipulates that the hygienic standard (maximum allowable concentration) of formaldehyde in indo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01J37/03B01J37/12B01J37/16B01D53/72
Inventor 申文杰唐幸福徐奕德
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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