Preparation method of pine nut shell-based activated carbon with high efficiency adsorption CO2
A technology based on activated carbon and pine nut shells, applied in the field of materials, can solve the problems of low cost, low carbon dioxide adsorption capacity, poor selectivity, etc., and achieve the effects of low cost, cost saving and wide source.
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Embodiment 1
[0048] CO adsorption 2 The preparation steps of the pine nut shell-based activated carbon are as follows: take 3g of 20-30 mesh pine nut shells and place them in a tube furnace, raise the temperature from room temperature to 500 degrees Celsius at a rate of 5 degrees Celsius / min, and keep at 500 degrees Celsius for 1.5 hours. Add 1g of carbonized material into 20mL potassium hydroxide solution, wherein the mass of potassium hydroxide is 0.5g. After two days of impregnation, the material was dried in an oven at 105°C for 8 hours. The dried material was placed in a tube furnace for activation. The activation procedure was as follows: firstly, the temperature was raised to 500°C at a rate of 10°C / min, kept at 500°C for 1.5 hours, and then naturally cooled to room temperature. During the process of carbonization and activation, the tube furnace is always protected by nitrogen gas. The activated material is repeatedly washed with high-purity water until the pH of the cleaning sol...
Embodiment 2
[0051] CO adsorption 2 The preparation steps of the pine nut shell-based activated carbon are as follows: take 3g of 20-30 mesh pine nut shells and place them in a tube furnace, raise the temperature from room temperature to 500 degrees Celsius at a rate of 5 degrees Celsius / min, and keep at 500 degrees Celsius for 1.5 hours. Add 1g of carbonized material into 20mL of potassium hydroxide solution, wherein the mass of potassium hydroxide is 1g. After two days of impregnation, the material was dried in an oven at 105°C for 12 hours. The dried material was placed in a tube furnace for activation. The activation procedure was as follows: first, the temperature was raised to 500 degrees Celsius at a rate of 10 degrees Celsius / min, and then to 800 degrees Celsius at a rate of 5 degrees Celsius / min. Keep at 800 degrees Celsius for 2.5 hours, and cool down to room temperature naturally. During the process of carbonization and activation, the tube furnace is always protected by nitro...
Embodiment 3
[0054] CO adsorption 2 The preparation steps of the pine nut shell-based activated carbon are as follows: take 3g of 20-30 mesh pine nut shells and place them in a tube furnace, raise the temperature from room temperature to 500 degrees Celsius at a rate of 5 degrees Celsius / min, and keep at 500 degrees Celsius for 1.5 hours. Add 1g of carbonized material into 20mL potassium hydroxide solution, wherein the mass of potassium hydroxide is 2g. After two days of impregnation, the material was dried in an oven at 105°C for 18 hours. The dried material was placed in a tube furnace for activation. The activation procedure was as follows: first, the temperature was raised to 500 degrees Celsius at a rate of 10 degrees Celsius / min, and then to 700 degrees Celsius at a rate of 5 degrees Celsius / min. Keep at 700°C for 1.5 hours, then cool down to room temperature naturally. During the process of carbonization and activation, the tube furnace is always protected by nitrogen gas. The ac...
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