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Activated carbons were prepared from rice husk carbonized in the fluidized catalysts bed reactor. Using the different activating agents, samples with BET surface area in the range from 540 to 3060 m2/g were achieved. Using sodium or potassium carbonates results in the BET surface area up to 1400 m2/g. Hydroxides of sodium or potassium yield the samples with the higher BET surface area (up to 3060 m...