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Process for storing carbon dioxide in flue gas by utilizing brucite

A process flow, carbon dioxide technology, applied in the direction of magnesium carbonate, through chemical separation, chemical instruments and methods, etc., can solve the problems of low development utilization rate, achieve high storage efficiency, avoid a large amount of heat, and broad application prospects

Inactive Publication Date: 2011-11-23
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some of them are used to produce products such as light burnt magnesium and heavy burnt magnesium, and the development and utilization rate is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] The raw material of brucite used in this embodiment comes from Dandong City, Liaoning Province, and the raw ore is in the shape of a block of about 10×10 cm. The mass content of main components in brucite is: MgO~63.44%, SiO 2 ~2.45%, CaO ~0.7%, Na2 O~0.31%, Fe 2 o 3 ~0.16%, P 2 o 5 ~0.13%, Al 2 o 3 ~0.03% and ablation amount (H 2 O.CO 2 etc.) 32.6%, the remaining impurities 0.18%.

[0074] step 1:

[0075] The raw brucite is roughly crushed to the millimeter level by a ball mill, and then further manually ground to the micron level, and then sieved to the required particle size through 40-mesh and 45-mesh standard sieves to obtain brucite with an average particle size of about 400 μm stone particles;

[0076] Step 2:

[0077] Prepare concentrated NH 4 Cl solution: take 5.34kgNH 4 The Cl solid was dissolved in 20 L of deionized water and transferred to a batch reactor, which was heated to 100° C. with an oil bath circulation and a stirring speed of 600 rpm....

Embodiment 2

[0094] The raw material of brucite used in this embodiment comes from Dandong City, Liaoning Province, and the raw ore is in the shape of a block of about 10×10 cm. The mass content of main components in brucite is: MgO~63.44%, SiO 2 ~2.45%, CaO ~0.7%, Na 2 O~0.31%, Fe 2 o 3 ~0.16%, P 2 o 5 ~0.13%, Al 2 o 3 ~0.03% and ablation amount (H 2 O.CO 2 etc.) 32.6%, the remaining impurities 0.18%.

[0095] step 1:

[0096] The brucite raw stone is roughly crushed to the millimeter level by a ball mill, and then further manually ground to the micron level, and then sieved to the required particle size by standard sieving of 80 mesh and 100 mesh respectively, and the average particle size is about 167 μm;

[0097] Step 2:

[0098] Prepare concentrated NH 4 Cl solution: take 4.3kgNH 4 The Cl solid was dissolved in 20 L of deionized water, and transferred to a batch reactor. The reactor was heated to 85° C. with an oil bath circulation, and the stirring speed was 400 rpm. Wa...

Embodiment 3

[0115] The raw material of brucite used in this embodiment comes from Dandong City, Liaoning Province, and the raw ore is in the shape of a block of about 10×10 cm. The mass content of main components in brucite is: MgO~63.44%, SiO 2 ~2.45%, CaO ~0.7%, Na 2 O~0.31%, Fe 2 o 3 ~0.16%, P 2 o 5 ~0.13%, Al 2 o 3 ~0.03% and ablation amount (H 2 O.CO 2 etc.) 32.6%, the remaining impurities 0.18%.

[0116] step 1:

[0117] The brucite raw stone is roughly crushed to the millimeter level by a ball mill, and then further manually ground to the micron level, and then passed through 140 mesh and 170 mesh standard sieves to the required particle size, with an average particle size of about 90 μm;

[0118] Step 2:

[0119] Prepare concentrated NH 4 Cl solution: take 3.2kgNH 4 The Cl solid was dissolved in 20 L of deionized water, and transferred to a batch reactor, and the reactor was heated to 75° C. with an oil bath circulation, and the stirring speed was 200 rpm. Waiting fo...

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Abstract

The invention provides a process for storing carbon dioxide in flue gas by utilizing brucite. By the process, the release of magnesium ions and the carbonatization process of carbon dioxide are separated; and corresponding improvement measures are taken for each process, so that the process is higher in efficiency and lower in energy consumption. NH4Cl solution for digesting the brucite can be repeatedly used, so that the recycling of a raw material and the resource utilization of a product are realized. The whole process is environment-friendly and efficient, and low in energy consumption, and has the potential of industrial scale application.

Description

technical field [0001] The invention relates to a process for sequestering carbon dioxide by minerals, in particular utilizing magnesium-rich minerals (brucite) to sequester carbon dioxide in flue gas. And realize the recycling of raw materials and resource utilization of products. Background technique [0002] Carbon capture and storage (CCS) refers to the storage of large carbon dioxide (CO 2 ) A technology in which carbon dioxide produced by emission sources is collected and stored in various ways to prevent it from being released into the atmosphere. This technology is considered to be the most economical and feasible way to reduce greenhouse gas emissions and slow down global warming on a large scale in the future. [0003] At present, the world's main carbon dioxide storage methods mainly include geological storage, ocean storage and mineral storage. Geological storage refers to the storage of carbon dioxide in the voids of underground formations, and various physic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/62C01F5/24
CPCY02C10/04Y02C20/40Y02P20/151
Inventor 赵良朱辰季伟捷
Owner NANJING UNIV
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