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A kind of deSO2 high-efficiency adsorbent and preparation method thereof

A technology of SO2 and adsorbent, which is applied in the field of high-efficiency adsorbent for removing SO2 and its preparation, can solve the problems of little research, and achieve the effects of low cost, large adsorption capacity and easy operation

Inactive Publication Date: 2016-01-13
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Natural magnesite and its processed products are often used as wet flue gas desulfurization agents, but there are few studies on its application in dry flue gas desulfurization

Method used

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  • A kind of deSO2 high-efficiency adsorbent and preparation method thereof
  • A kind of deSO2 high-efficiency adsorbent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The magnesite was crushed and ground, and the magnesite passed through a 100-mesh standard sieve was calcined at 650°C for 2 hours to obtain a calcined product (the transmission electron microscope picture is shown in figure 1 shown). Weigh the calcined product according to the solid-to-liquid mass ratio of 1:20 and add it to water, hydrate it in a constant temperature water bath at 50°C and 1000r / min magnetic stirring for 4 hours, filter it, dry it at 105°C for 12 hours, and then calcinate it at 500°C 1h obtains the deSO of present embodiment 2 efficient adsorbent.

[0020] Adsorption performance test:

[0021] The specific surface area of ​​the prepared adsorbent was obtained by nitrogen adsorption BET specific surface area measurement method, and the result was 140.52m 2 / g.

[0022] In a vacuum desiccator, test the deSO of this embodiment 2 Highly efficient adsorbent for SO 2 The adsorption performance, the adsorption test conditions are: the desiccator is vac...

Embodiment 2

[0024] The magnesite is crushed and ground, and then the magnesite passed through a 100-mesh standard sieve is calcined at 650° C. for 2 hours to obtain a calcined product. Weigh the calcined product according to the solid-to-liquid mass ratio of 1:20 and add it to an aqueous solution containing 0.1mol / L ferric nitrate, hydrate it in a constant temperature water bath at 50°C and 1000r / min magnetic stirring for 4 hours, filter and wash it, and bake it at 105°C Dry for 12 hours, then calcined at 500°C for 1 hour to obtain the deSO 2 efficient adsorbent. According to the method test adsorption performance of embodiment 1, it is to SO 2 The adsorption capacity is 227.76mg / g

Embodiment 3

[0026] The magnesite is crushed and ground, and the magnesite passed through a 100-mesh standard sieve is calcined at 650° C. for 2 hours to obtain a calcined product. Weigh the calcined product according to the solid-to-liquid mass ratio of 1:20 and add it to an aqueous solution containing 0.05mol / L cerium nitrate, hydrate it in a constant temperature water bath at 50°C and 1000r / min magnetic stirring for 4 hours, filter and wash it, and bake it at 105°C Dry for 12 hours, then calcined at 500°C for 1 hour to obtain the deSO 2 efficient adsorbent. According to the method test adsorption performance of embodiment 1, it is to SO 2 The adsorption capacity is 238.71mg / g

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Abstract

The invention discloses a SO2-removal efficient adsorbent and a preparation method thereof. The preparation method for the SO2-removal efficient adsorbent comprises the following steps: (1) calcining and activating magnesite: crushing and grinding the magnesite to 100-400 mesh particle diameter, and calcining the ground magnesite for 2 h or less at the temperature of 650-900 DEG C to obtain calcined products; (2) hydrating and loading active transitional metal for modification: adding the calcined products into water or transitional metal ionic aqueous solution containing Fe<3+>, Ce<3+> or Ti<4+> according to the solid-liquid mass ratio of 1:(15-30), and conducting hydration for 1-6 h, so that hydrated products are obtained; (3) conducting solid-liquid separation on the hydrated products, and drying the separated solid phase under the condition that the temperature is 105-120 DEG C, so that dried materials are obtained; (4) calcining and activating the dried materials for 1-2 h under the condition that the temperature is 450-500 DEG C, so that the SO2-removal efficient adsorbent is obtained. According to the SO2-removal efficient adsorbent and the preparation method thereof, provided by the invention, the SO2 adsorption testing result shows that the prepared adsorbent has the advantages that the adsorption capacity to the SO2 is high, and the adsorption efficiency is high; the prepared adsorbent can be widely used in the fields of SO2 removal through adsorption and pollution prevention.

Description

Technical field: [0001] The invention belongs to the technical field of mineral resource processing and utilization and preparation of environmental protection materials, and in particular relates to a 2 High-efficiency adsorbent and its preparation method. Background technique: [0002] At present, my country's energy structure is still dominated by coal, and the SO produced by coal combustion 2 Pollution is still very serious. In recent years, smog pollution in many provinces and cities in my country has become increasingly serious, among which SO 2 The converted PM2.5 particulate matter is one of the important causes. SO emissions into the air 2 The acid deposition formed has also brought serious damage to ecosystems such as agriculture and forestry. SO2 from coal combustion 2 Deep desulfurization of flue gas is to control SO 2 important measure of pollution. Flue gas desulfurization is mainly divided into two categories: wet method and dry method. Wet flue gas d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/04B01J20/30B01D53/02
Inventor 张强陶奇何宏平朱建喜陈天虎刘海波
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI