Ag2S-MMt nanometer composite adsorbent and preparation method thereof

A nano-composite and adsorbent technology, applied in the field of composite materials, can solve the problem of high complexity and high cost, and achieve the effects of good economy, low price and low cost

Active Publication Date: 2019-03-22
SHANDONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to overcome the technical defect that the existing gaseous mercury adsorbent preparation process is complex and costly, the present invention provides a Ag 2 S-MMT nanocomposite adsorbent

Method used

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  • Ag2S-MMt nanometer composite adsorbent and preparation method thereof
  • Ag2S-MMt nanometer composite adsorbent and preparation method thereof
  • Ag2S-MMt nanometer composite adsorbent and preparation method thereof

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Embodiment Construction

[0035] The technical solution of the present invention will be described in detail below according to the drawings and specific embodiments.

[0036] Ag of the present invention 2 The preparation method of S-MMT nanocomposite adsorbent is:

[0037] The first step: preparation of montmorillonite (MMT) dispersion

[0038] Weigh bentonite and place it in a container, add deionized water therein, and stir for 9 hours on a magnetic stirrer to fully swell and disperse bentonite to obtain a dispersion whose main component is montmorillonite. The prepared montmorillonite dispersion molar The concentration is 15g / L;

[0039] Step 2: Preparation of loaded Ag + MMT dispersion

[0040] Add AgNO to the montmorillonite dispersion prepared in the first step 3 Solution, continue to stir on the magnetic stirrer for 3h, so that Ag + Adsorbed on the surface of MMT, the molar number of silver nitrate loaded in the prepared dispersion per gram of bentonite is 0.001mol / g;

[0041]The third s...

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Abstract

The invention discloses an Ag2S-MMt nanometer composite adsorbent and a preparation method thereof. The g2S-MMt nanometer composite adsorbent is prepared by loading nanometer silver sulfide onto montmorillonite with one-step synthesis by utilizing a vapour phase diffusion method in a closed container. In the preparation method, by utilizing the vapour phase diffusion method, the prepared nanometersilver sulfide particles are small in size (about 20-49 nm), has very good surface performance, adsorption performance and storage performance and can be uniformly distributed on the surface of bentonite; and the adsorbent synthesized with a one-step method has good removal effect on gaseous elemental mercury with the mercury removal efficiency reaching 85-90 percent at the temperature of 180 DEGC.

Description

technical field [0001] The invention belongs to the field of composite materials, in particular to an adsorbent for removing gaseous mercury in flue gas, especially Ag 2 S-MMT nanocomposite adsorbent. Background technique [0002] Mercury is a toxic substance that accumulates permanently in organisms and in the food chain, and poses a greater threat to human survival and health [1] . Most of the mercury produced in the coal combustion process will be discharged into the atmosphere with the tail flue gas, becoming an important source of mercury in the atmosphere. Although the mercury content in coal-fired flue gas is relatively low, the annual mercury emission is quite considerable based on the global coal consumption of 7-8 billion tons. [0003] The current coal-fired mercury control technologies mainly include sorbent injection technology, flue gas purification device mercury removal technology, coal washing technology and corona discharge plasma technology, and the tec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12B01D53/02B01J20/30
CPCB01D53/02B01D2257/602B01J20/0233B01J20/0285B01J20/12
Inventor 李敏张华伟刘丽华徐冬梅郭琳
Owner SHANDONG UNIV OF SCI & TECH
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