CO2 mineralizing process

A carbon dioxide, mineralization technology, applied in the preparation of carbonate/acid carbonate, magnesium carbonate, calcium carbonate/strontium/barium, etc., can solve the problem that high-purity carbon dioxide has not been effectively solved, and achieve reserves Abundant, easy to mine, no environmental pollution

Inactive Publication Date: 2007-08-22
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0012] Although the separation technology of carbon dioxide is very mature at present, how to deal with the high-purity carbon dioxide obtained after separation has not been effectively solved.

Method used

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Examples

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example 1

[0029] Example 1. 1.5 grams of serpentine with 15% by mass of magnesium was crushed and ground to a powder of 200 mesh, and the serpentine ore sample was roasted at a constant temperature of 650°C for 1 hour, and then the roasted ore sample and the catalytic solution (NaHCO 3 :2.016g, NaCl: 2.19g, distilled water: 13.5ml) After mixing evenly, place it in the reactor of the high-pressure reaction system, fill with carbon dioxide, the reaction temperature is 155℃, the reaction pressure is 10MPa; keep the temperature and pressure unchanged and react 60 After 5 minutes, cool down. When the temperature of the system is lower than 85℃, vent the air. Take out the residue in the reactor and dry it at 105℃ for 1 hour. Then take out 1.026 g of the dried residue and send it to the muffle furnace for calcination for 2 hours. , The calcination temperature is 650℃. The calcined product is weighed, and the weighed mass is 0.941 g, which passes the mass M before calcining 1(1.026 g) and the mass ...

example 2

[0031] Example 2. Crushing 2.0 grams of serpentine with 20% by mass of magnesium to a powder of 300 mesh, and roasting the serpentine ore sample at a constant temperature of 650°C for 1 hour, and then the roasted ore sample and the catalytic solution (NaHCO 3 :3.024g, NaCl: 3.216g, distilled water: 16.5ml) After mixing uniformly, place it in the reactor of the high-pressure reaction system, and fill with carbon dioxide. The reaction temperature is 120℃, and the reaction pressure is 12MPa; keep the temperature and pressure unchanged and react 60 Minutes later, cool down. When the temperature of the system is lower than 85°C, let the gas escape. Take out the residue in the reactor and dry it at 105°C for 1 hour. Then take out 1.055 g of the dried residue and send it to the muffle furnace for calcination for 2 hours. , The calcination temperature is 650℃. Weigh the calcined product, the mass after weighing is 0.972 g, which passes the mass M before calcining 1 (1.055g) and the mass a...

example 3

[0032] Example 3. Grind 10 grams of wollastonite with 35% calcium by mass to a powder of 400 mesh, and roast the wollastonite sample at a constant temperature of 650°C for 2 hours, and add 40 ml once to a reactor with a volume of 0.25L Distilled water and 10.0 grams of 400 mesh wollastonite powder were filled with carbon dioxide, the reaction temperature was 150°C, and the reaction pressure was 6MPa; after keeping the temperature and pressure unchanged, after reacting for 60 minutes, cool to room temperature and vent the air. Collect the residue in a beaker. After the upper solution in the beaker is clear, the solution is poured out, and the solid is transferred to a porcelain boat, and dried in a drying oven at 105°C for 24 hours. After the solid product was dried in a drying oven, 1.007 grams were taken out and subjected to a calcination decomposition test at a high temperature, the calcination time was 1 hour, and the calcination temperature was 700°C. Weigh the calcined produc...

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Abstract

The CO2 mineralizing process includes the steps of: grinding silicate mineral of natural calcium and magnesium into powder, mixing with the mixed solution of sodium bicarbonate and sodium chloride or distilled water in a reaction kettle, filling CO2 gas to the reaction kettle to 3-12 MPa and reaction at 100-250 deg.c via stirring for 30-90 min to produce carbonate and realize the permanent storage of CO2. The present invention adopts rich natural silicate and can realize large scale CO2 treatment.

Description

Technical field [0001] The invention relates to a method for mineralizing carbon dioxide, in particular to a method for directly reacting silicate minerals containing calcium and magnesium with carbon dioxide to generate carbonate minerals. Background technique [0002] In the field of research on environmental pollution and prevention of combustion sources, following many pollutants such as sulfur dioxide, nitrogen oxides, particulate matter, toxic trace elements, etc., the impact of carbon dioxide’s "greenhouse effect" on the environment for human existence has caused worldwide extensive attention. The World Energy Agency once asserted that the most direct impact on the earth's environment suitable for human habitation is the carbon dioxide content in the atmosphere. The reality of global warming is constantly ringing alarm bells to people around the world. The climate warming in the past 50 years is mainly due to the large amount of CO emitted by humans using fossil fuels. 2 E...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/24C01F11/18C01F5/24C01B32/60
Inventor 张军营赵永椿王志亮潘霞宴恒郑楚光
Owner HUAZHONG UNIV OF SCI & TECH
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