A kind of metal pillar modified layered manganese birnessite and its preparation and application

A modified layer and metal pillar technology, applied in the field of metal pillar modified layered manganese Birnessite and its preparation, can solve the problems of easy poisoning and deactivation, increase of industrial cost, etc., achieve strong chlorine poisoning resistance, energy saving, The effect of easy preparation

Active Publication Date: 2021-06-25
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, as far as the currently reported catalysts are concerned, while manganese has high activity as noble metals, it is also very easy to be poisoned and deactivated. Like noble metal catalysts, catalysts are frequently replaced, increasing industrial costs

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  • A kind of metal pillar modified layered manganese birnessite and its preparation and application
  • A kind of metal pillar modified layered manganese birnessite and its preparation and application
  • A kind of metal pillar modified layered manganese birnessite and its preparation and application

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preparation example Construction

[0040] The object of the present invention is to provide a kind of preparation method of metal pillar modified layered manganese Birnessite, described preparation method comprises the following steps:

[0041] Step 1: Prepare a layered manganese precursor, and the product is denoted as K-Bir;

[0042] Step 2: carry out hydrogen ion exchange, and the product is denoted as H-Bir;

[0043] Step 3: Perform pillar replacement, and the product is denoted as A-Bir;

[0044] Step 4: introduce metal ion reaction, the product is recorded as AM-Bir;

[0045] Step 5: Roasting, the product is recorded as M-Bir.

[0046] MnO with layered structure 2 The crystalline compounds are collectively called δ-MnO 2 , the space group belongs to C2 / m, it is a monoclinic crystal system, and the [MnO 6 ] Formed by a common edge. Among them, some Mn 3+ ion substitution Mn 4+ The position makes the manganese and oxygen negatively charged, while metal cations and organic macromolecules can enter th...

Embodiment 1

[0123] Add 100ml deionized water to the hydrothermal kettle, then add 1.58g KMnO 4 Add it into a hydrothermal kettle, and stir in deionized water for 30 minutes, then add 2ml of 0.15mol / L ammonia water; then react the added raw materials in a hydrothermal kettle at 160°C for 12h, and the reaction ends;

[0124] Filter the solid-liquid mixture of the reaction solution in the hydrothermal kettle, and wash the filter cake with deionized water until the pH value of the filtrate is 7 to obtain the filter cake; then dry the filter cake at 80°C for 12 hours to obtain K-Bir;

[0125] The resulting K-Bir was placed in 1M HNO 3 In the solution, heat and stir at 40°C for 24 hours to carry out hydrogen ion exchange to prepare H-Bir;

[0126] Put the obtained H-Bir in 0.5 mol / L n-octylamine-ethanol solution, the molar ratio of n-octylamine to manganese is 5:1, heat and stir at 45°C for 24h to carry out pillar replacement, suction filtration, Dry the filter cake at 80°C for 12 hours to ob...

Embodiment 2

[0130] Add 100ml deionized water to the hydrothermal kettle, then add 1.58g KMnO 4 Add it into a hydrothermal kettle, stir in deionized water for 30 minutes, then add 2ml of 0.15mol / L citric acid; then react the added raw materials in a hydrothermal kettle at 160°C for 12h, and the reaction is complete;

[0131] Filter the solid-liquid mixture of the reaction solution in the hydrothermal kettle, and wash the filter cake with deionized water until the pH value of the filtrate is 7 to obtain the filter cake; then dry the filter cake at 80°C for 12 hours to obtain K-Bir;

[0132] The resulting K-Bir was placed in 1M HNO 3 In the solution, heat and stir at 40°C for 24 hours to carry out hydrogen ion exchange to prepare H-Bir;

[0133] Put the obtained H-Bir in 0.5mol / L n-octylamine ethanol solution, the molar ratio of n-octylamine to manganese is 5:1, heat and stir at 45°C for 24h to carry out pillar replacement, suction filter, and The filter cake was dried at 80°C for 12 hours...

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Abstract

The invention relates to a metal pillar modified layered manganese Birnessite and its preparation and application. The present invention prepares a layered manganese precursor by hydrothermal method by adding a sedimentation aid, and then undergoes hydrogen ion exchange, pillar replacement, and The reaction of introducing metal ions, and finally roasting to obtain metal pillar modified layered manganese Birnessite, the prepared catalyst has high catalytic oxidation activity, catalytic degradation performance, thermal stability and anti-poisoning ability, and can be used for catalytic degradation Volatile organic compounds (VOCs) in flue gas. The preparation method provided by the invention is simple and has industrial application value.

Description

technical field [0001] The invention relates to the field of air pollution control, in particular to a metal-pillared modified layered manganese Birnessite with efficient catalytic oxidation degradation performance for volatile organic waste gas, especially chlorine-containing volatile organic compounds in flue gas and its Preparation methods and applications. Background technique [0002] Nowadays, air pollution is becoming more and more serious. Among them, volatile organic compounds (Volatile Organic Compounds, VOCs) are one of the main pollutants in air pollution. They are also the main cause of photochemical smog and haze, which have a serious impact on human life and health. The use of chemicals such as paints, lubricating oils, and organic solvents, the incineration of industrial waste residues, the emission of various exhaust gases, petrochemical and petroleum refining, the production of rubber, and the frequent use of pesticides all lead to the emission of a large a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/34B01J35/08B01D53/86B01D53/70
CPCB01D53/8662B01J23/002B01J23/34B01J35/08B01J2523/00B01J2523/13B01J2523/31B01J2523/72
Inventor 张婷婷陈远庭胡立扬罗邯予余江
Owner BEIJING UNIV OF CHEM TECH
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