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Method for preparing zero-valent-nanoferrum loaded modified zeolite for deleading coal-fired flue gas

A technology of nanometer zero-valent iron and modified zeolite, which is applied in separation methods, chemical instruments and methods, gas treatment, etc., can solve problems such as the inability to apply gas Pb elemental adsorption, lack of modified zeolite, etc., to increase surface tension, The effect of controllable reaction conditions

Active Publication Date: 2018-06-15
GUANGDONG J TECH ENVIRONMENT SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method can only be applied to the field of sewage treatment, and cannot be applied to the adsorption of gaseous Pb
[0007] In summary, the current technology still lacks a modified zeolite capable of adsorbing lead simple substances and lead compounds present in the gaseous environment.

Method used

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  • Method for preparing zero-valent-nanoferrum loaded modified zeolite for deleading coal-fired flue gas
  • Method for preparing zero-valent-nanoferrum loaded modified zeolite for deleading coal-fired flue gas

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Example 1 Preparation of modified zeolite A1 loaded with nanometer zero-valent iron

[0028] (1) Pretreatment: 50 grams of zeolite with 1mol / L HNO 3 The solution was stirred for 12 hours, pickled to remove impurities, washed three times with deionized water and dried;

[0029] (2) Preparation of nano-iron: add 200 grams of deionized water to the pretreated zeolite in step (1), and then add FeSO 4 ·7H 2 O and 1mol / L HNO 3 The solution was adjusted to a pH of 2-5, and then a solution containing 4 g of NaBH 4 Configured 50ml reducing agent solution, and stirred at room temperature for 60 minutes to synthesize the zeolite loaded with nanometer zero-valent iron;

[0030] (3) Synthesis of modified zeolite loaded with nanometer zero-valent iron: add 10 grams of chitosan and 1 gram of 4-nonylphenol ethoxylate to the solution of step (2), and under ultrasonic conditions and 60 ℃ Stirred at a temperature of 60 minutes for 60 minutes to obtain black spherical particles;

[0...

Embodiment 2

[0032] Example 2 Preparation of modified zeolite A2 loaded with nanometer zero-valent iron

[0033] (1) Pretreatment: 50 grams of zeolite with 1mol / L HNO 3 The solution was stirred for 12 hours, pickled to remove impurities, washed three times with deionized water and dried;

[0034] (2) Preparation of nano-iron: add 200 grams of deionized water to the pretreated zeolite in step (1), and then add FeSO 4 ·7H 2 O and 1mol / L HNO3 The solution was adjusted to a pH of 2-5, and then a solution containing 4 g of NaBH 4 Configured 50ml reducing agent solution, and stirred at room temperature for 60 minutes to synthesize the zeolite loaded with nanometer zero-valent iron;

[0035] (3) Synthesis of modified zeolite loaded with nanometer zero-valent iron: add 2 grams of chitosan and 0.2 gram of 4-nonylphenol ethoxylate to the solution of step (2), and under ultrasonic conditions and 60 ℃ Stirred at a temperature of 60 minutes for 60 minutes to obtain black spherical particles;

[00...

Embodiment 3

[0037] Example 3 Preparation of modified zeolite A3 loaded with nanometer zero-valent iron

[0038] (1) Pretreatment: 50 grams of zeolite with 1mol / L HNO 3 The solution was stirred for 12 hours, pickled to remove impurities, washed three times with deionized water and dried;

[0039] (2) Preparation of nano-iron: add 200 grams of deionized water to the pretreated zeolite in step (1), and then add FeSO 4 ·7H 2 O and 1mol / L HNO 3 The solution was adjusted to a pH of 2-5, and then a solution containing 4 g of NaBH 4 Configured 50ml reducing agent solution, and stirred at room temperature for 60 minutes to synthesize the zeolite loaded with nanometer zero-valent iron;

[0040] (3) Synthesis of modified zeolite loaded with nanometer zero-valent iron: add 1 gram of chitosan and 0.1 gram of 4-nonylphenol ethoxylate to the solution of step (2), and under ultrasonic conditions and 60 ℃ Stirred at a temperature of 60 minutes for 60 minutes to obtain black spherical particles;

[0...

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Abstract

The invention discloses a method for preparing zero-valent-nanoferrum loaded modified zeolite for deleading coal-fired flue gas. The method comprises the following steps of pretreatment, nanoferrum preparing, zero-valent-nanoferrum loaded modified zeolite synthesizing and drying and washing. According to the zero-valent-nanoferrum loaded modified zeolite prepared by the method, high reducibility of zero-valent ferrum is utilized, high adsorbability of zeolite is combined and improved, the lead chelation and adsorption action of chitosan is utilized, and elemental Pb and Pb existing in the formof compound PbCl2 in the coal-fired flue gas can be adsorbed, so that heavy-metal pollution is removed from the coal-fired flue gas to the maximum.

Description

technical field [0001] The invention relates to the field of coal-fired flue gas purification, in particular to a preparation method of a modified zeolite loaded with nanometer zero-valent iron for removing lead from coal-fired flue gas. Background technique [0002] Lead is a heavy metal and one of the earliest metals used by humans. It can be used in construction, lead-acid batteries, warheads, shells, welding materials, fishing gear, fishing gear, radiation protection materials, trophies, sulfuric acid corrosion resistance, and ionizing radiation protection Some alloys of materials such as batteries, storage batteries, etc., the alloys can be used for typefaces, bearings, cable sheaths, etc., and can also be used as sports equipment shot puts, and so on. Lead is a toxic heavy metal that is extremely harmful to the human body. Therefore, when lead and its compounds enter the body, they will cause harm to multiple systems such as nerves, hematopoiesis, digestion, kidneys, c...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30B01D53/02B01D53/64B01D53/81
CPCB01D53/02B01D53/64B01D53/81B01D2251/20B01D2253/25B01D2258/0283B01J20/24
Inventor 胡静龄刘勇胡小吐钟璐杨颖欣
Owner GUANGDONG J TECH ENVIRONMENT SCI CO LTD
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