Micro and mesoporous molded activated carbon was fabricated from rice husk and beet sugar. Beet sugar was added into rice husk pre-carbonized at 250°C in the form of syrup. This blend was carbonized at 600°C and then pulverized. The powder obtained was press-molded into a disc using the beet sugar syrup as a binder. The molded disc was carbonized at 875 °C and then immersed in the beet sugar syrup. The immersed disc was activated at 875°C in CO_2 for 0.5-2.5 h. The pore structure of the rice husk and beet sugar based activated carbon (RHBSAC) was analyzed in relation to bulk density. The gas activation time of 2.0 h provided the largest total pore volume and BET specific surface area (0.68 cm~3/g and 1027 m~2/g), but low bulk density (0.54 g/cm~3). RHBSAC of which activation time was 1 h was once again immersed in the beet sugar syrup and then activated in CO_2 for 1 h. This two-steps activation provided high bulk density (0.69 g/cm~3) and high micro and mesoporous structure (BET specific surface area: 943 m~2/g, total pore volume: 0.56 cm~3/g, micropore volume: 0.32 cm~3/g, mesopore volume: 0.19 cm~3/g).
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