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In the present work, a sustainable route to prepare high-performance porous carbons from hydrochars by KOH activation was described. The hydrochars was obtained from sulfuric acid hydrolyzate of rice husk via dehydration, polymerization and carbonization. When the pretreated hydrochars (42%) was activated at 400°C for 0.5h and 800°C for 1h with the mass ratio of KOH/hydrochars of 5:1, the high specific...
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