Preparation method of modified activated carbon nanosheet and separation column thereof

Abstract

The invention belongs to the technical field of gas separation, and particularly relates to a method for effectively separating CO2 in flue gas by a modified activated carbon nanosheet. An ultrasonic peeling method is mainly adopted to obtain an activated carbon nanosheet; then, an acid solution is used for carrying out oxidative modification; finally, a breakthrough experiment indicates that the separation volume of a modified activated carbon nanosheet material subjected to vacuum activation at a temperature of 80DEG C for CO2 / N2 mixed gas (v to v=15 to 85, and total flow is 20mL / min) at room temperature is 15.79cm<3>g, and separation selectivity is 4.37. The modified activated carbon nanosheet can be used as a solid adsorbent material for effectively separating the CO2 in the flue gas.

Description

technical field

[0001] The invention belongs to the technical field of gas separation, and in particular relates to a preparation method using a modified activated carbon nanosheet and a separation column thereof. Background technique

[0002] As global warming becomes more serious, CO 2 emissions, especially industrial CO 2 Emissions have become a pervasive issue of global concern. Currently, the application of effective separation technologies can reduce CO in power plants 2 emissions, which account for 40% of total emissions. While separating and capturing CO from power plant flue gas 2 , mainly refers to the saturation of N from water 2 , a small amount of O 2 Separation of CO from a mixture with other substances 2 , low flue gas pressure and CO 2 The small partial pressure determines the difficulty of this project. Therefore, the research and development and industrialization of CO2 capture and separation technology are the main hot issues concerned by countrie...

Examples

Embodiment 1

[0033] S1: Disperse 3g of activated carbon in a mixed solvent of 90g of water and 45g of ethanol, perform ultrasonic separation at 2°C for 80 minutes, then perform centrifugation, collect the solid part and wash it with distilled water to obtain activated carbon nanosheet materials;

[0034] S2: Disperse the 0.6g activated carbon nanosheet material in 48g, 1N nitric acid solution, stir at 60°C for 20min, add 138g of distilled water, stir for 5min, filter, collect the filter residue for washing, adjust the pH value to 5, and dry get solid;

[0035] S3: passing water vapor into the solid, and treating at 250° C. for 1 hour to obtain modified activated carbon nanosheets.

[0036] S4: Put the prepared modified activated carbon nanosheets into a vacuum drying oven at 80°C, activate them for 20 hours under the condition of 5 μmHg, and remove the water and solvent to obtain a method for effectively separating CO in flue gas according to the present invention. 2 modified activated ca...

Embodiment 2

[0040] S1: Disperse 3g of activated carbon in a mixed solvent of 100g of water and 50g of ethanol, perform ultrasonic separation at 5°C for 90 minutes, then perform centrifugation, collect the solid part and wash with distilled water to obtain activated carbon nanosheet materials;

[0041] S2: Disperse the 0.8g activated carbon nanosheet material in 68g, 2N hydrochloric acid solution, stir at 65°C for 30min, add 200g of distilled water, stir for 8min, filter, collect the filter residue for washing, adjust the pH value to 6, and dry get solid;

[0042] S3: passing water vapor into the solid, and treating at 300° C. for 1.5 h to obtain modified activated carbon nanosheets.

[0043] S4: Put the prepared modified activated carbon nanosheet into a vacuum drying oven at 80°C, activate it for 24 hours under the condition of 5 μmHg, and remove the water and solvent to obtain a method for effectively separating CO in flue gas according to the present invention. 2 modified activated ca...

Embodiment 6

[0067] S1: Disperse 3g of activated carbon in a mixed solvent of 120g of water and 60g of ethanol, perform ultrasonic separation at 8°C for 100 minutes, then perform centrifugation, collect the solid part and wash it with distilled water to obtain activated carbon nanosheet materials;

[0068] S2: Disperse the 1.2g activated carbon nanosheet material in 105g, 3N sulfuric acid solution, stir at 80°C for 40min, add 300g of distilled water, stir for 15min, filter, collect the filter residue for washing, adjust the pH value to 7, and dry get solid;

[0069] S3: passing water vapor into the solid, and treating at 400° C. for 2 hours to obtain modified activated carbon nanosheets.

[0070] S4: Put the prepared modified activated carbon nanosheets into a vacuum drying oven at 80°C, activate them for 30 hours under the condition of 5 μmHg, and remove the water and solvent to obtain a method for effectively separating CO in flue gas according to the present invention. 2 modified activ...

technical field

[0001] The invention belongs to the technical field of gas separation, and in particular relates to a preparation method using a modified activated carbon nanosheet and a separation column thereof. Background technique

[0002] As global warming becomes more serious, CO 2 emissions, especially industrial CO 2 Emissions have become a pervasive issue of global concern. Currently, the application of effective separation technologies can reduce CO in power plants 2 emissions, which account for 40% of total emissions. While separating and capturing CO from power plant flue gas 2 , mainly refers to the saturation of N from water 2 , a small amount of O 2 Separation of CO from a mixture with other substances 2 , low flue gas pressure and CO 2 The small partial pressure determines the difficulty of this project. Therefore, the research and development and industrialization of CO2 capture and separation technology are the main hot issues concerned by countrie...

Examples

Embodiment 1

[0033] S1: Disperse 3g of activated carbon in a mixed solvent of 90g of water and 45g of ethanol, perform ultrasonic separation at 2°C for 80 minutes, then perform centrifugation, collect the solid part and wash it with distilled water to obtain activated carbon nanosheet materials;

[0034] S2: Disperse the 0.6g activated carbon nanosheet material in 48g, 1N nitric acid solution, stir at 60°C for 20min, add 138g of distilled water, stir for 5min, filter, collect the filter residue for washing, adjust the pH value to 5, and dry get solid;

[0035] S3: passing water vapor into the solid, and treating at 250° C. for 1 hour to obtain modified activated carbon nanosheets.

[0036] S4: Put the prepared modified activated carbon nanosheets into a vacuum drying oven at 80°C, activate them for 20 hours under the condition of 5 μmHg, and remove the water and solvent to obtain a method for effectively separating CO in flue gas according to the present invention. 2 modified activated ca...

Embodiment 2

[0040] S1: Disperse 3g of activated carbon in a mixed solvent of 100g of water and 50g of ethanol, perform ultrasonic separation at 5°C for 90 minutes, then perform centrifugation, collect the solid part and wash with distilled water to obtain activated carbon nanosheet materials;

[0041] S2: Disperse the 0.8g activated carbon nanosheet material in 68g, 2N hydrochloric acid solution, stir at 65°C for 30min, add 200g of distilled water, stir for 8min, filter, collect the filter residue for washing, adjust the pH value to 6, and dry get solid;

[0042] S3: passing water vapor into the solid, and treating at 300° C. for 1.5 h to obtain modified activated carbon nanosheets.

[0043] S4: Put the prepared modified activated carbon nanosheet into a vacuum drying oven at 80°C, activate it for 24 hours under the condition of 5 μmHg, and remove the water and solvent to obtain a method for effectively separating CO in flue gas according to the present invention. 2 modified activated ca...

Embodiment 6

[0067] S1: Disperse 3g of activated carbon in a mixed solvent of 120g of water and 60g of ethanol, perform ultrasonic separation at 8°C for 100 minutes, then perform centrifugation, collect the solid part and wash it with distilled water to obtain activated carbon nanosheet materials;

[0068] S2: Disperse the 1.2g activated carbon nanosheet material in 105g, 3N sulfuric acid solution, stir at 80°C for 40min, add 300g of distilled water, stir for 15min, filter, collect the filter residue for washing, adjust the pH value to 7, and dry get solid;

[0069] S3: passing water vapor into the solid, and treating at 400° C. for 2 hours to obtain modified activated carbon nanosheets.

[0070] S4: Put the prepared modified activated carbon nanosheets into a vacuum drying oven at 80°C, activate them for 30 hours under the condition of 5 μmHg, and remove the water and solvent to obtain a method for effectively separating CO in flue gas according to the present invention. 2 modified activ...

Images