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Metal oxide-loaded molecular sieve catalyst and preparation method thereof

A technology of supporting metals and catalysts, applied in molecular sieve catalysts, physical/chemical process catalysts, separation methods, etc., can solve the problems of poor oxidation effect of ethanol acetaldehyde and unsatisfactory purification effect, and achieve excellent low-temperature removal performance of ethanol acetaldehyde , Outstanding oxidation ability, good low temperature activity

Active Publication Date: 2012-12-05
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to overcome the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a molecular sieve catalyst loaded with metal oxides and a preparation method thereof, which can solve the problem of the oxidation of ethanol acetaldehyde remaining in the tail gas of ethanol gasoline vehicles by existing exhaust catalytic converters. The technical problem of poor effect and unsatisfactory purification effect has the characteristics of high purification efficiency, low price and good thermal stability

Method used

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  • Metal oxide-loaded molecular sieve catalyst and preparation method thereof
  • Metal oxide-loaded molecular sieve catalyst and preparation method thereof
  • Metal oxide-loaded molecular sieve catalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] A molecular sieve catalyst loaded with metal oxides, comprising the following components:

[0025] Pure cryptopotassium manganese dioxide is the active component, accounting for 94% of the total mass of the catalyst, and the doped transition metal Ce component accounts for 6% of the total mass of the catalyst, and the active component passes through Mn 7+ and Mn 2+ The reaction generates, and the molar ratio of the two is 0.72.

[0026] A method for preparing a metal oxide-loaded molecular sieve catalyst, which is prepared by a reflux method, specifically comprises the following steps:

[0027] 1. Prepare 280mL of potassium permanganate solution with a concentration of 0.38mol / L, heat and stir at 56°C to form a solution;

[0028] 2. Configure 288mL of manganese acetate solution with a concentration of 0.54mol / L, heat and stir at 58°C to form a solution;

[0029] 3. Slowly add the solution obtained in step 1 into a 1000mL three-necked flask, heat in an oil bath at 108...

Embodiment 2

[0038] An octahedral manganese oxide molecular sieve catalyst comprises the following components:

[0039] Pure cryptopotassium manganese dioxide is the active component, accounting for 90% of the total mass of the catalyst, and the doped transition metal Co component accounts for 10% of the total mass of the catalyst, and the active component passes through Mn 7+ and Mn 2+ The reaction generates, and the molar ratio of the two is 0.72.

[0040] A method for preparing a metal oxide-loaded molecular sieve catalyst, which is prepared by a reflux method, specifically comprises the following steps:

[0041] 1. Prepare 150mL of potassium permanganate solution with a concentration of 0.30mol / L, heat and stir at 40°C to form a solution;

[0042] 2. Configure 150mL of manganese acetate solution with a concentration of 0.45mol / L, heat and stir at 40°C to form a solution;

[0043] 3. Slowly add the solution obtained in step 1 into a 1000mL three-necked flask, heat in an oil bath at 8...

Embodiment 3

[0052] An octahedral manganese oxide molecular sieve catalyst comprises the following components:

[0053] Pure cryptopotassium manganese dioxide is the active component, accounting for 95% of the total mass of the catalyst, and the doped transition metal Cu component accounts for 5% of the total mass of the catalyst, and the active component passes through Mn 7+ and Mn 2+ The reaction generates, and the molar ratio of the two is 0.72.

[0054] A method for preparing a metal oxide-loaded molecular sieve catalyst, which is prepared by a reflux method, specifically comprises the following steps:

[0055] 1. Prepare 300mL of potassium permanganate solution with a concentration of 0.40mol / L, heat and stir at 60°C to form a solution;

[0056] 2. Configure 300mL of manganese acetate solution with a concentration of 0.55mol / L, heat and stir at 60°C to form a solution;

[0057] 3. Slowly add the solution obtained in step 1 into a 1000mL three-necked flask, heat in an oil bath at 11...

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Abstract

A metal oxide-loaded molecular sieve catalyst comprises pure cryptomelane type manganese dioxide and transition metal. A method for preparing the molecular sieve catalyst comprises the following steps: 1, preparing solution of potassium permanganate; 2, preparing solution of manganese acetate; 3, adding the solution obtained by the step one into a three-neck flask, and heating, condensing and refluxing the solution; 4, adding the solution obtained by the step two into the three-neck flask of the step three, condensing and refluxing the solution, filtering and drying the obtained black pasty sediment, and roasting the sediment to obtain an octahedral manganese oxide molecular sieve catalyst (OMS-2) solid; 5, adding cerium ammonium nitrate, cobalt nitrate hexahydrate, copper nitrate trihydrate, ferric nitrate nonahydrate or yttrium nitrate into deionized water to form solution; and 6, mixing the solid taken from the step four and the solution in the step five, soaking cerium on the octahedral manganese oxide molecular sieve catalyst (OMS-2) solid, and drying and roasting the obtained solid to obtain the metal oxide-loaded molecular sieve catalyst. The metal oxide-loaded molecular sieve catalyst has the characteristics of high purification efficiency, low price and good thermal stability.

Description

technical field [0001] The invention relates to the technical field of preparation of molecular sieve catalysts, in particular to a molecular sieve catalyst loaded with metal oxides and a preparation method thereof. Background technique [0002] With the development of industry and the improvement of people's living standards, the number of car ownership has risen sharply. Automobiles consume a large amount of oil resources, exacerbating the oil shortage crisis, and at the same time, a large amount of harmful gases contained in automobile exhaust have caused serious pollution to the environment. In order to solve the two major problems of energy crisis and environmental pollution, it has become a trend to choose low-emission, abundant and easy-to-get new fuels to replace gasoline. On February 10, 2004, the eight ministries and commissions summed up past experience and jointly issued the "Notice on Printing and Distributing the Plan for Expanding the Pilot Project of Ethanol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/00B01D53/94B01D53/86B01D53/72
Inventor 李俊华王仁虎郝吉明
Owner TSINGHUA UNIV
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