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Metal pillared modified layered manganese Birnessite, preparation and applications thereof

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: 2019-08-09
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 catalysts reported so far are concerned, while manganese has high activity as noble metals, it is also easily poisoned and deactivated like noble metals. If manganese oxide is added to the catalyst in a small amount as an active species like noble metals, the life of the catalyst will be shortened. Like noble metal catalysts, catalysts are often replaced, increasing industrial costs

Method used

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  • Metal pillared modified layered manganese Birnessite, preparation and applications thereof
  • Metal pillared modified layered manganese Birnessite, preparation and applications thereof
  • Metal pillared modified layered manganese Birnessite, preparation and applications thereof

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preparation example Construction

[0040] The purpose of this invention is to provide a kind of preparation method of metal pillar modified layered manganese Birnessite, and described preparation method may further comprise the steps:

[0041] Step 1: Preparation of layered manganese precursor, the product is recorded as K-Bir;

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

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

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

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

[0046] MnO with layered structure 2 The crystalline compounds are collectively referred to as δ-MnO 2 , the space group belongs to C2 / m, which is a monoclinic system, with [MnO 6 ] formed by common edges. Among them, part of Mn 3+ Ion Substituted Mn 4+ The position of MnO makes it negatively charged, and metal cations and organic macromolecules can enter MnO 2 betwe...

Embodiment 1

[0123] Add 100ml of deionized water to the hydrothermal kettle, then add 1.58g of KMnO 4 Add to the hydrothermal kettle, stir in deionized water for 30min, then add 2ml of 0.15mol / L ammonia water; then react the added raw materials in the 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 of the filtrate is 7 to obtain a 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, the H-Bir was prepared by heating and stirring at 40 °C for 24 h for hydrogen ion exchange;

[0126] The obtained H-Bir was placed in a 0.5mol / L n-octylamine-ethanol solution, the molar ratio of n-octylamine and manganese was 5:1, heated and stirred at a temperature of 45°C for 24h to carry out column replacement, suction filtration, The filter cake was dr...

Embodiment 2

[0130] Add 100ml of deionized water to the hydrothermal kettle, then add 1.58g of KMnO 4 was added to the hydrothermal kettle, stirred in deionized water for 30 min, and then added 2 ml of 0.15 mol / L citric acid; then the added raw materials were reacted in the hydrothermal kettle at 160°C for 12 h, and the reaction ended;

[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 of the filtrate is 7 to obtain a 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, the H-Bir was prepared by heating and stirring at 40 °C for 24 h for hydrogen ion exchange;

[0133] The obtained H-Bir was placed in a 0.5 mol / L n-octylamine ethanol solution, the molar ratio of n-octylamine and manganese was 5:1, heated and stirred at 45 °C for 24 h to carry out column replacement, suction filtration, and The fil...

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Abstract

The invention relates to metal pillared modified layered manganese Birnessite, preparation and applications thereof. According to the present invention, a layered manganese precursor is prepared by adding a settling agent through a hydrothermal method, hydrogen ion exchange and pillaring replacement are performed, a reaction is performed by introducing metal ions, and calaining is performed to obtain the metal pillared modified layered manganese Birnessite. According to the present invention, the prepared catalyst has advantages of high catalytic oxidation activity, high catalytic degradationproperty, high thermal stability and high anti-poisoning ability, and can be used for the catalytic degradation of volatile organic compounds (VOCs) in flue gas; and the preparation method 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, which has efficient catalytic oxidation and degradation performance for volatile organic waste gas, especially chlorine-containing volatile organic compounds in the flue gas, and the same Preparation method and application. Background technique [0002] Nowadays, air pollution is becoming more and more serious. Volatile organic compounds (VOCs) are one of the main pollutants in air pollution, and they are also the main causes of photochemical smog and haze, which have a serious impact on human life and health. The use of paints, lubricants, organic solvents and other chemicals, the incineration of industrial waste residues, the discharge of various exhaust gases, petrochemical and petroleum refining, rubber production, and frequent use of pesticides all lead to the emission of a large amount of VOCs into the atmosphere. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01J35/08B01D53/86B01D53/70
CPCB01J23/34B01J23/002B01D53/8662B01J2523/00B01J35/51B01J2523/13B01J2523/31B01J2523/72
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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