Diatomite-based composite porous ceramic material for adsorbing volatile organic pollutant and preparation method thereof

A volatile organic and porous ceramic technology, applied in separation methods, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of single pore structure of adsorbent, easy to be disturbed by airflow, high energy consumption in the reaction process, and achieve short preparation cycle. , reduce costs, improve the effect of VOC

Active Publication Date: 2015-04-08
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the disadvantages of single pore structure of the adsorbent in the preparation and use of VOCs adsorbents in the prior art, high energy consumption in the reaction process, and being easily disturbed by air flow, and provide a method for volatile organic pollutants (VOCs) Adsorbed diatomite-based composite porous ceramic material and preparation method thereof

Method used

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  • Diatomite-based composite porous ceramic material for adsorbing volatile organic pollutant and preparation method thereof
  • Diatomite-based composite porous ceramic material for adsorbing volatile organic pollutant and preparation method thereof
  • Diatomite-based composite porous ceramic material for adsorbing volatile organic pollutant and preparation method thereof

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Embodiment 1

[0029] 1. Preparation of diatomite-based porous ceramic carrier: Take 40 g of diatomite and add it to 100 ml of additive solution, and stir thoroughly at room temperature for 15 hours to prepare a ceramic slurry. The auxiliary agent solution includes 1.8% of sodium chloride, 9.9% of sodium metasilicate nonahydrate, 5.6% of polydimethyldiallylammonium chloride, and the balance is water. Then immerse the polyurethane foam in the above ceramic slurry, vacuum impregnate for 5 minutes, squeeze out the excess slurry, repeat the vacuum impregnation and extrusion of the polyurethane foam for 3 times, after drying, heat up to 600°C at a rate of 1°C / min, and keep warm for 3 hour, and then continue to heat up to 850°C at 10°C / min, and take it out after calcination for 6 hours to obtain a diatomite-based porous ceramic carrier.

[0030] 2. Preparation of diatomite-based composite porous ceramic material: 1.5 g of the diatomite-based porous ceramic carrier prepared in step 1) is added to 6...

Embodiment 2

[0037] a. Preparation of diatomite-based porous ceramic carrier: take 40 g of diatomite and add it into 100 ml of additive solution, stir thoroughly at room temperature for 3 hours to prepare a ceramic slurry. The auxiliary agent solution includes 1.9% of sodium chloride, 6.7% of sodium metasilicate nonahydrate, 6.0% of polydimethyldiallylammonium chloride, and the balance is water. Then the polyurethane foam was immersed in the above ceramic slurry, vacuum impregnated for 10 minutes, and excess slurry was squeezed out. Continue to repeat vacuum impregnation and extrusion 5 times in this way, after drying, heat up to 800°C at a rate of 1°C / min, keep it for 2 hours, then continue to heat up to 1000°C at 5°C / min, take it out after calcination for 6 hours, and obtain diatomite-based porous ceramic support.

[0038] 2. Preparation of diatomite-based composite porous ceramic material: 1.5 g of the diatomite-based porous ceramic carrier prepared in step 1) is added to 60 ml of poly...

Embodiment 3

[0042] 1. Preparation of diatomite-based porous ceramic carrier: Take 40 g of diatomite and add it to 100 ml of additive solution, and stir thoroughly at room temperature for 15 hours to prepare a ceramic slurry. The auxiliary agent solution includes 1.7% of sodium chloride, 16.2% of sodium metasilicate nonahydrate, 5.0% of polydimethyldiallylammonium chloride, and the balance is water, based on the total mass fraction of 100%. Then the polyurethane foam was immersed in the above ceramic slurry, vacuum impregnated for 3 minutes, and excess slurry was squeezed out. Repeat this process to repeatedly vacuum impregnate the polyurethane foam, extrude it 5 times, heat it up to 550°C at a rate of 1°C / min after drying, keep it warm for 5 hours, then continue to heat up to 850°C at a rate of 5°C / min, and take it out after calcination for 3 hours to obtain Diatomaceous earth based porous ceramic support.

[0043] 2. Preparation of diatomite-based composite porous ceramic material: 1.5 ...

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Abstract

The invention discloses a diatomite-based composite porous ceramic material for adsorbing a volatile organic pollutant and a preparation method thereof. The preparation method comprises the following steps of: preparing a diatomite-based double-macropore ceramic carrier through a polyurethane template method by taking low-cost diatomite as a raw material; then uniformly loading pure silicon zeolite nano-particles on the surface of the carrier material through an in-situ reflux loading method to prepare the diatomite-based composite porous ceramic material. The diatomite-based composite porous ceramic material disclosed by the invention is a mass forming material, forms a double-macropore / micropore multi-level pore structure, has a pure silicon zeolite micropore and a macropore duplicated on a polyurethane template, and reserves the macroporous structure of the diatomite. In addition, the diatomite-based composite porous ceramic material disclosed by the invention is relatively high in heat stability and large in specific area and total pore volume, and has excellent adsorption property on gases of VOCs, namely benzene, dichloromethane, n-hexane and the like. In addition, the preparation method of the diatomite-based composite porous ceramic material, which is disclosed by the invention, has the characteristics of simple process, moderation in condition, low pollution, low energy consumption and wide industrial application prospect.

Description

Technical field: [0001] The invention belongs to the field of treatment of volatile organic pollutants, in particular to a diatomite-based composite porous ceramic material used for adsorption of volatile organic pollutants (VOCs) and a preparation method thereof. Background technique: [0002] Volatile organic pollutants (VOCs) usually refer to organic compounds with a boiling point of 50-250°C and a saturated vapor pressure of more than 133.3Pa at room temperature, including hydrocarbons, halogenated hydrocarbons, aromatic hydrocarbons, polycyclic aromatic hydrocarbons, etc. Ubiquitous and complex organic pollutants (Shen Xueyou et al., Journal of Zhejiang University, 2001), the emission sources are mainly industrial waste gas, automobile exhaust, building materials and interior decoration materials. Most VOCs are toxic and irritating, can be teratogenic, carcinogenic, and mutagenic, and can also be used as precursors to produce photochemical smog, causing serious harm to ...

Claims

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Application Information

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IPC IPC(8): B01J20/18B01J20/28B01J20/32B01D53/02
CPCB01D53/02B01D2253/106B01D2253/108B01D2257/206B01D2257/7022B01J20/14B01J20/18B01J20/3204B01J2220/42B01J2220/4806Y02A50/20
Inventor 袁巍巍袁鹏刘冬于文彬邓亮亮何宏平
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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