Preparation method of attapulgite/porous carbon composite material
A composite material and porous carbon technology, applied in chemical instruments and methods, and other chemical processes, can solve the problems of rice husk resources not being rationally utilized, resource waste, and rice husk polluting the environment, and achieve enhanced reactivity and improved Adsorption performance, effect of enriching concave soil pore structure
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Embodiment 1
[0019] 1. Rice husks are washed with water, dried, crushed, and passed through a 200-mesh sieve. Mix 10 kilograms of rice husks and 20 kilograms of attapulgite evenly, add 300 kilograms of sulfuric acid solution with a concentration of 10% by mass, keep the reaction at 120°C for 20 hours, and filter with suction to prepare the attapulgite / porous carbon precursor;
[0020] 2. Take 15 kg of the attapulgite / porous carbon precursor obtained in step 1, and measure its solid content to be 25%, add 12.5 kg of an alkali solution with a concentration of 10% by mass, soak for 20 hours, and place the resulting mixture in a nitrogen atmosphere at 400°C After activating for 3 hours, attapulgite / activated carbon composite material was prepared;
[0021] 3. Disperse the attapulgite / activated carbon composite material obtained in step 2 into 125 kg of deionized water, heat and boil for 60 minutes, filter, wash until the conductivity of the filtrate is 300 μS / cm, and dry to obtain the attapulg...
Embodiment 2
[0023] 1. Rice husks are washed with water, dried, crushed, and passed through a 200-mesh sieve. Mix 10 kg of rice husk and 10 kg of attapulgite evenly, add 40 kg of 2% sulfuric acid solution by mass, and keep the reaction at 140°C for 24 hours. Suction filtration to obtain attapulgite / porous carbon precursor;
[0024] 2. Take 10 kilograms of the attapulgite / porous carbon precursor obtained in step 1, measure its solid content as 28%, add 5.6 kilograms of an alkali solution with a concentration of 50% by mass, soak for 24 hours, and place the resulting mixture in a nitrogen atmosphere Activated at 550°C for 4 hours to prepare attapulgite / activated carbon composites;
[0025] 3. Disperse the attapulgite / activated carbon composite material obtained in step 2 into 70 kg of deionized water, heat and boil for 90 minutes, filter, wash until the conductivity of the filtrate is 280 μS / cm, and dry to obtain the attapulgite / porous carbon composite material .
Embodiment 3
[0027] 1. Rice husks are washed with water, dried, crushed, and passed through a 200-mesh sieve. Mix 20 kilograms of rice husks and 10 kilograms of attapulgite evenly, add 200 kilograms of sulfuric acid solution with a concentration of 4% by mass, keep the reaction at 180°C for 18 hours, and filter with suction to prepare the attapulgite / porous carbon precursor;
[0028] 2. Take 8 kilograms of the attapulgite / porous carbon precursor obtained in step 1, measure its solid content to be 32%, add 6.4 kilograms of an alkali solution with a concentration of 20% by mass, soak for 6 hours, and place the resulting mixture in a nitrogen atmosphere Activated at 425°C for 5 hours to prepare attapulgite / activated carbon composites;
[0029] 3. Disperse the attapulgite / activated carbon composite material obtained in step 2 into 51.2 kg of deionized water, heat and boil for 45 minutes, filter, wash until the conductivity of the filtrate is 270 μS / cm, and dry to obtain the attapulgite / porous ...
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