Potassium-doped MnO2 catalyst and preparation method thereof

A catalyst and potassium doping technology are applied in the field of potassium doped MnO2 catalyst and its preparation, which can solve the problems of complicated preparation process and incapability of doping, and achieve the effects of simple process, convenient operation and increased quantity

Inactive Publication Date: 2019-10-29
HEBEI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation process of the prior art is relatively complicated, and K + Ions mostly exist in the pores of molecular sieves, and they cannot be uniformly doped in MnO 2 in the lattice

Method used

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  • Potassium-doped MnO2 catalyst and preparation method thereof
  • Potassium-doped MnO2 catalyst and preparation method thereof
  • Potassium-doped MnO2 catalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] A potassium-doped MnO 2 The preparation method of catalyst, comprises the steps:

[0033] S1: Take 3.16g (0.02mol) of KMnO 4 Completely dissolved in 50 mL of distilled water to obtain KMnO 4 solution, take 2.1mL (0.02mol) of benzyl alcohol and add it dropwise to KMnO 4 In the solution, after the dropwise addition, stir and react in a water bath at 15°C for 24h, filter with suction, wash with water until neutral, then wash with ethanol, then wash with water until neutral, and dry at 110°C for 12h to obtain MnO 2 precursors, where MnO 2 Mn in the precursor 4+ Accounting for 92% of the total amount of Mn elements;

[0034] S2: Take 33.6g (0.6mol) KOH in a 50mL beaker, dissolve it in distilled water, transfer the KOH solution into a 100mL volumetric flask, dilute to the mark with distilled water, shake well, and prepare a 6M KOH solution. Measure 23mL of the prepared KOH solution in a 100mL round bottom flask, add 1g (11.5mmol) of the above MnO 2 The precursor was he...

Embodiment 2

[0036]A potassium-doped MnO 2 The preparation method of catalyst, comprises the steps:

[0037] S1: Take 3.16g (0.02mol) of KMnO 4 Completely dissolved in 50 mL of distilled water to obtain KMnO 4 solution, take 2.1mL (0.02mol) of benzyl alcohol and add it dropwise to KMnO 4 solution, after the dropwise addition, stirred and reacted in a water bath at 10°C for 24h, filtered with suction, washed with water until neutral, then washed with water until neutral, and dried at 110°C for 12h to obtain MnO 2 precursors, where MnO 2 Mn in the precursor 4+ Accounting for 92% of the total amount of Mn elements;

[0038] S2: Take 11.2g (0.2mol) KOH in a 50mL beaker, dissolve it in distilled water, transfer the KOH solution into a 100mL volumetric flask, dilute to the mark with distilled water, shake well, and prepare a 2M KOH solution. Measure 23mL of the prepared KOH solution in a 100mL round bottom flask, add 1g (11.5mmol) of the above MnO 2 Precursor, heated and refluxed for 12h,...

Embodiment 3

[0040] A potassium-doped MnO 2 The preparation method of catalyst, comprises the steps:

[0041] S1: Take 3.16g (0.02mol) of KMnO 4 Completely dissolved in 50 mL of distilled water to obtain KMnO 4 solution, take 1.05mL (0.001mol) of benzyl alcohol and add it dropwise to KMnO 4 In the solution, after the dropwise addition, stir the reaction in a water bath at 10°C for 20h, filter with suction, wash with water until neutral, then wash with ethanol, then wash with water until neutral, and dry at 120°C for 10h to obtain MnO 2 precursors, where MnO 2 Mn in the precursor 4+ Accounting for 90% of the total amount of Mn elements;

[0042] S2: Take 44.8g (0.8mol) KOH in a 50mL beaker, dissolve it in distilled water, transfer the KOH solution into a 100mL volumetric flask, dilute to the mark with distilled water, shake well, and prepare an 8M KOH solution. Measure 23mL of the prepared KOH solution in a 100mL round bottom flask, add 1g (11.5mmol) of the above MnO 2 Precursor, hea...

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Abstract

The invention relates to the technical field of chemical catalysts, and particularly discloses a potassium-doped MnO2 catalyst and a preparation method thereof. The preparation method comprises the following steps that a MnO2 precursor is added to a KOH solution, refluxing reaction is carried out, and a product is dried and calcined to obtain the potassium-doped MnO2 catalyst. According to the preparation method, the process is simple, the operation is convenient, potassium permanganate and benzyl alcohol are used as raw materials to prepare a KOH-OMS-2 catalyst with K<+> and -OH simultaneously doped, the catalytic combustion activity of VOCs organic waste gas is increased, and the low temperature treatment efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of chemical catalysts, in particular to a potassium-doped MnO 2 Catalyst and method for its preparation. Background technique [0002] At present, the primary task to solve the problem of VOCs pollution is to deal with benzene series pollutants. Existing methods for treating benzene series pollutants include catalytic oxidation, adsorption and absorption, biodegradation, photocatalytic oxidation, and plasma treatment. Among them, the catalytic oxidation method can fully convert VOCs into pollution-free CO due to its outstanding advantage. 2 and H 2 O, has been considered as the most promising governance technology. The key point in the catalytic oxidation method is the choice of catalyst, and manganese oxide is the most common catalyst in this method. [0003] MnO 2 There are many crystal forms of , among which oxide octahedral molecular sieve (OMS-2) has long been used as a highly active, low-cost, en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01D53/86B01D53/44
CPCB01D53/8687B01D2257/708B01J23/002B01J23/34
Inventor 吴银素宋鑫鑫白彤石飒刘迁
Owner HEBEI NORMAL UNIV
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