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Demercuration adsorbent based on pillared montmorillonite, preparation method and application thereof

A technology of pillared montmorillonite and adsorbent, which is applied in the direction of chemical instruments and methods, other chemical processes, alkali metal oxides/hydroxides, etc., can solve the problems of complex preparation methods of modified kaolinite, and achieve improved The effect of mercury's ability

Inactive Publication Date: 2016-06-15
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation method of the modified kaolinite is complicated, and its mercury adsorption effect needs to be further improved

Method used

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  • Demercuration adsorbent based on pillared montmorillonite, preparation method and application thereof

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Effect test

Embodiment 1

[0065] A mercury removal adsorbent based on pillared montmorillonite, the adsorbent includes aluminum pillared montmorillonite and manganese oxide loaded on aluminum pillared montmorillonite, the mass of manganese element in the manganese oxide is the same as that of pillared montmorillonite The ratio of destoned mass is 1:100, and the particle size of the adsorbent is 60-80 mesh.

[0066] The preparation method of the mercury removal sorbent based on pillared montmorillonite comprises the following steps:

[0067] (1) At 40°C, it will be AlCl 3 ·6H 2 NaOH with 1 times the molar concentration of O is slowly dropped into AlCl 3 ·6H 2 O solution, fully stirred for 2 hours, and then stood still for 2 hours; then slowly added dropwise the obtained solution to the montmorillonite powder at a ratio of 1 mmol / g to the amount of the pillar precursor at 40°C, and stirred thoroughly for 1 hour before Stand for 1 hour, then filter, wash, and dry to form pillared montmorillonite;

[...

Embodiment 2

[0070] A mercury removal adsorbent based on pillared montmorillonite, the adsorbent includes aluminum pillared montmorillonite and manganese oxide loaded on aluminum pillared montmorillonite, the mass of manganese element in the manganese oxide is the same as that of pillared montmorillonite The ratio of destoned mass is 1:10, and the particle size of the adsorbent is 60-80 mesh.

[0071] The preparation method of the mercury removal sorbent based on pillared montmorillonite comprises the following steps:

[0072] (1) At 100°C, it will be AlCl 3 ·6H 2 NaOH with 5 times the molar concentration of O is slowly dropped into AlCl 3 ·6H 2 O solution, fully stirred for 6 hours, and then stood still for 6 hours; then slowly added dropwise the obtained solution to the montmorillonite powder with a ratio of 10 mmol / g to the amount of the pillar precursor at 120 ° C, and stirred thoroughly for 5 hours before Stand still for 5 hours, then filter, wash, and dry to form pillared montmor...

Embodiment 3

[0075] A mercury removal adsorbent based on pillared montmorillonite, the adsorbent includes aluminum pillared montmorillonite and manganese oxide loaded on aluminum pillared montmorillonite, the mass of manganese element in the manganese oxide is the same as that of pillared montmorillonite The ratio of destoned mass is 2:100, and the particle size of the adsorbent is 60-80 mesh.

[0076] The preparation method of the mercury removal sorbent based on pillared montmorillonite comprises the following steps:

[0077] (1) At 50°C, it will be AlCl 3 ·6H 2 NaOH with 4 times the molar concentration of O is slowly dropped into AlCl 3 ·6H 2 O solution, fully stirred for 4 hours, and then stood still for 4 hours; then slowly added dropwise the obtained solution to the montmorillonite powder with a ratio of 3 mmol / g to the amount of the pillar precursor at 60 ° C, and fully stirred for 4 hours before Stand for 4 hours, then filter, wash, and dry to form pillared montmorillonite;

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Abstract

The present invention provides a mercury removal adsorbent based on pillared montmorillonite, its preparation method and application. The adsorbent includes a carrier and an active component loaded on the carrier. The carrier is pillared montmorillonite. The active component is a metal oxide, and the ratio of the mass of the metal element to the mass of the pillared montmorillonite in the metal oxide is ≤10.0wt.%. The adsorbent makes full use of the structural characteristics of montmorillonite and the activity of the active components to adsorb elemental mercury, so that the two can play a synergistic effect; the mercury removal adsorbent not only has high thermal stability: mercury removal within 100-450 °C The efficiency reaches 99%, and it also has a high mercury removal efficiency: the inlet mercury concentration is 120ug / m 3 The mercury removal efficiency is as high as 99% within 10 hours, and over 94% even within 20 hours. It can be used to remove mercury in flue gas produced by power plants, industrial boilers or industrial kilns.

Description

technical field [0001] The invention belongs to the technical field of flue gas pollutant control, and relates to a mineral material for adsorbing and removing mercury in flue gas, its preparation method and its application, in particular to a mercury removal adsorbent based on pillared montmorillonite, its preparation Methods and uses. Background technique [0002] Mercury, commonly known as mercury, is the only white transition metal that exists in liquid form at normal temperature and pressure. It has the characteristics of high toxicity, persistence, easy migration and high bioaccumulation, and has caused great harm to human beings and the entire ecological environment. my country is a big coal-producing and coal-burning country. The heavy metal mercury produced in the coal combustion process accounts for 35% of the total atmospheric mercury emissions, so it is of great significance to control the mercury emissions in the coal combustion flue gas. [0003] Mercury emi...

Claims

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Application Information

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IPC IPC(8): B01J20/06B01J20/28B01J20/30B01D53/04
CPCB01J20/06B01D53/04B01D2257/602B01J20/28016B01J2220/4806
Inventor 朱廷钰徐文青吴应红杨阳
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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