Technology for producing acid granular activated carbon by air activation method
An acid particle, air activation technology, applied in chemical instruments and methods, inorganic chemistry, carbon compounds, etc., can solve the problem of ineffective development of pores in carbon
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Embodiment 1
[0023] At a carbonization temperature above 800°C, the wood is carbonized into charcoal, and the activated raw carbon is obtained by crushing to 20-40 mesh. Mix 10g of raw charcoal with 50mL of 10% (w / w) phosphoric acid solution, stir and impregnate at room temperature for 2h, then filter, and dry the raw charcoal in an oven at 120°C for more than 5h. The impregnated and dried charcoal is activated in a horizontal furnace. The air flow rate is 100mL / min (under normal temperature and pressure), the activation temperature is 800°C, and the activation time is 1h. During the activation process, the mass ratio of the air activator to the raw carbon is about 0.9:1. After cooling, wash the material with deionized water until the pH value of the filtrate is 6-7. The samples were dried in an oven at 120°C to constant weight. The yield of activated carbon is 58.4%, and the specific surface area of the prepared activated carbon is 561m 2 / g, the specific pore volume is 0.4405cm 3 / ...
Embodiment 2
[0025] At a carbonization temperature above 800°C, the wood is carbonized into charcoal, and the activated raw carbon is obtained by crushing to 10-20 mesh. Mix 10g of raw charcoal with 50mL of 20% (w / w) phosphoric acid solution, stir and impregnate at room temperature for 2h, then filter, and dry the raw charcoal in an oven at 120°C for more than 5h. The impregnated and dried charcoal is activated in a horizontal furnace. The air flow rate is 100mL / min (under normal temperature and pressure), the activation temperature is 800°C, and the activation time is 1h. During the activation process, the mass ratio of the air activator to the raw carbon is about 0.9:1. After cooling, the material was washed with deionized water until the filtrate was nearly neutral. The samples were dried in an oven at 120°C to constant weight. The yield of activated carbon is 60.4%, and the specific surface area of the prepared activated carbon is 513m 2 / g, the specific pore volume is 0.3476cm 3...
Embodiment 3
[0027]At a carbonization temperature above 800°C, the wood is carbonized into charcoal, and the activated raw carbon is obtained by crushing to 20-30 mesh. Mix 10g of raw charcoal with 50mL of 30% (w / w) phosphoric acid solution, stir and impregnate at room temperature for 2h, then filter, and dry the raw charcoal in an oven at 120°C for more than 5h. The impregnated and dried charcoal is activated in a horizontal furnace. The air flow rate is 100mL / min (under normal temperature and pressure), the activation temperature is 800°C, and the activation time is 1h. During the activation process, the mass ratio of the air activator to the raw carbon is about 0.9:1. After cooling, the material was washed with deionized water until the filtrate was nearly neutral. The samples were dried in an oven at 120°C to constant weight. The yield of activated carbon is 62.0%, and the specific surface area of the prepared activated carbon is 790m 2 / g, the specific pore volume is 0.4249cm 3 ...
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