Method for preparing adsorbent for volatile organic compounds (VOCs) in air

An adsorbent and air technology, applied in the field of adsorbent synthesis, can solve problems such as cumbersome procedures, secondary pollution, and expensive materials, and achieve the effects of high synthesis safety, low environmental pollution, and simple operation

Active Publication Date: 2013-08-21
WUHAN HONGJINLONG PRINTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the synthesis method of VOCs adsorbent is mainly by the template method or the sol-gel method, but the synthesis method is cumbersome, the materials are expensive, the requirements for industrial equipment are relatively strict, and the synthesis produces secondary pollution, which is not conducive to the long-term Therefore, it is of great significance to explore new synthetic methods of adsorbents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 1) Analysis of the chemical composition of raw material blast furnace slag: X-ray fluorescence spectrometry (XRF) was used to analyze the element content in blast furnace slag, and the Ca / (Al+Si) ratio was calculated to be 0.03, Al / (Al+Si ) ratio is 0.165;

[0018] 2) Adjust blast furnace slag Ca / (Al+Si) ratio and Al / (Al+Si) ratio: add 0.48g CaO and 0.087g SiO to 1g blast furnace slag 2 Adjust Ca / (Al+Si) ratio and Al / (Al+Si) ratio to 0.8 and 0.15 respectively;

[0019] 3) Preparation of the reaction mixture: add 31 mL of deionized water to the adjusted mixture, and stir at 25°C for 10 minutes;

[0020] 4) Synthesis of adsorbent: put the reaction mixture in a reaction kettle, react at 180°C for 24 hours to obtain the reaction product, wash the reaction product with deionized water, and dry it at 80°C to obtain the adsorbent;

[0021] 5) Take 10g of the synthesized adsorbent and place it in 1L of collected air containing VOCs. After 24 hours of adsorption, use gas chrom...

Embodiment 2

[0023] 1) Analysis of the chemical composition of raw material blast furnace slag: X-ray fluorescence spectrometry (XRF) was used to analyze the element content in blast furnace slag, and the Ca / (Al+Si) ratio was calculated to be 0.03, Al / (Al+Si ) ratio is 0.165;

[0024] 2) Adjust blast furnace slag Ca / (Al+Si) ratio and Al / (Al+Si) ratio: add 0.51g CaO and 0.39g SiO to 0.7g blast furnace slag 2 Adjust Ca / (Al+Si) ratio and Al / (Al+Si) ratio to 0.8 and 0.1 respectively;

[0025] 3) Preparation of the reaction mixture: add 32 mL of deionized water to the adjusted mixture, and stir at 25°C for 10 minutes;

[0026] 4) Synthesis of adsorbent: put the reaction mixture in a reaction kettle, react at 180°C for 24 hours to obtain the reaction product, wash the reaction product with deionized water, and dry it at 80°C to obtain the adsorbent;

[0027] 5) Take 10g of the synthesized adsorbent and place it in 1L of collected air containing VOCs. After 24 hours of adsorption, use gas chrom...

Embodiment 3

[0029] 1) Analysis of the chemical composition of raw material blast furnace slag: X-ray fluorescence spectrometry (XRF) was used to analyze the element content in blast furnace slag, and the Ca / (Al+Si) ratio was calculated to be 0.03, Al / (Al+Si ) ratio is 0.165;

[0030] 2) Adjust blast furnace slag Ca / (Al+Si) ratio and Al / (Al+Si) ratio: add 0.51g CaO and 0.7g SiO to 0.35g blast furnace slag 2 Adjust Ca / (Al+Si) ratio and Al / (Al+Si) ratio to 1.0 and 0.05 respectively;

[0031] 3) Preparation of the reaction mixture: add 31 mL of deionized water to the adjusted mixture, and stir at 25°C for 10 minutes;

[0032] 4) Synthesis of adsorbent: put the reaction mixture in a reaction kettle, react at 180°C for 24 hours to obtain the reaction product, wash the reaction product with deionized water, and dry it at 80°C to obtain the adsorbent;

[0033] 5) Take 10g of the synthesized adsorbent and place it in 1L of air collected during the printing process. After 24 hours of adsorption, ...

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Abstract

The invention relates to a method for preparing an adsorbent for volatile organic compounds (VOCs) in air. The method comprises the following steps of: 1) analyzing chemical components of raw material blast furnace slag; 2) adjusting a Ca/(Al+Si) ratio and an Al/(Al+Si) ratio of the blast furnace slag; 3) preparing a reaction mixture; and 4) synthesizing the adsorbent for the VOCs. The method for synthesizing the adsorbent for the VOCs is simple to operate, economical, quick, high in synthesis safety, low environment pollution and the like; the adsorbent can be applied to actual application of VOCs-containing air purification; a new development prospect is developed for the comprehensive utilization of the blast furnace slag and the synthesis of the VOCs adsorbent; and the method can be used in the fields of industries and environments.

Description

technical field [0001] The invention relates to a preparation method of a VOCs adsorbent in air, and belongs to the technical field of adsorbent synthesis. Background technique [0002] Blast furnace slag is an industrial solid waste. The slag discharged from the blast furnace ironmaking process is also called blast furnace slag. China currently emits more than 20 million tons per year. Disposal of slag will occupy land, waste resources and pollute the environment. Blast furnace slag contains oxides of calcium, silicon, aluminum, magnesium, manganese, iron, etc., so it provides the possibility for the synthesis of silicate adsorbents from blast furnace slag. The layered silicate synthesized from blast furnace slag belongs to the orthorhombic system, and part of the Si4+ in the structure can be replaced by Al3+, so it has a unique layered space structure. It is effective against VOCs (volatile organic compounds) in the air Strong adsorption, thus laying the foundation for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/16B01J20/30B01D53/02
CPCY02A50/20
Inventor 曾强朱浩波朱红艳丁常青陈卫兵朱小利代昌雄李波钟书华张修华宋功武
Owner WUHAN HONGJINLONG PRINTING
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