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[Chemical Knowledge]：Manufacturing method and process of carbon dioxide

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The manufacturing method of carbon dioxide has important application value in the field of chemical production raw materials. This article will detail three common carbon dioxide manufacturing methods, including calcination, fermentation and electrolysis. Through these methods, we can effectively produce high-purity carbon dioxide, providing a stable supply of raw materials for chemical production.

1. calcination method

calcination method is a common carbon dioxide manufacturing method, mainly by calcining limestone or other carbonate materials to obtain carbon dioxide. This process involves the pyrolysis of the carbonate, which releases carbon dioxide gas. The specific steps are as follows:

1. Limestone (CaCO3) is heated to a high temperature (usually 800-1000 ℃) to decompose it to generate calcium oxide (CaO) and carbon dioxide (CO2) gas.
CaCO3 → CaO CO2 ↑
2. Through cooling and condensation, the carbon dioxide gas is separated from the reaction system for further purification and purification.

calcination method has the advantages of easy availability of raw materials, low cost and simple operation, so it has been widely used in the field of chemical production. However, this method also has the disadvantages of high energy consumption and emission of a large amount of exhaust gas, and further improvement and optimization are needed.

2. fermentation

fermentation is a method of producing carbon dioxide by microbial metabolism. In this process, microorganisms convert organic matter into energy and release carbon dioxide. The specific steps are as follows:

1. add organic substances (such as glucose, sucrose, etc.) as carbon source into the fermenter.
2. Add appropriate microbial strains to carry out metabolic activities under suitable temperature, pH and oxygen conditions.
3. Microorganisms break down organic matter into energy and carbon dioxide, which is collected by emitting gases.

fermentation method has the advantages of mild conditions, low energy consumption and environmental protection, so it has attracted attention in the field of chemical production. However, the carbon dioxide yield of this method is low, and it is necessary to further optimize the strain and improve the fermentation efficiency.

3. electrolysis

electrolysis is a method in which water is decomposed into hydrogen and oxygen by electrolysis, and hydrogen is converted into carbon dioxide by chemical reaction. The specific steps are as follows:

1. The water molecules are decomposed into hydrogen and oxygen by electrolysis.
2H2O → 2H2 O2
2. Chemically react hydrogen with carbon oxides (such as CO or CO2) to generate carbon dioxide and water vapor.
H2 CO → CO2 H2O
3. Through cooling and condensation, the carbon dioxide gas is separated from the reaction system and further purified.

electrolysis has the advantages of high product purity and no pollution, but it has high energy consumption and high equipment cost, so it is limited in practical application.

In summary, calcination, fermentation and electrolysis are all common carbon dioxide manufacturing methods, and each method has its advantages and disadvantages and scope of application. When choosing a manufacturing method, it is necessary to consider comprehensively according to specific production needs and conditions, with the goal of improving production efficiency, reducing costs, and reducing environmental pollution. With the continuous progress and application of science and technology, there may be more efficient and environmentally friendly carbon dioxide manufacturing methods in the future, providing more choices for the development of chemical production.

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