Abstract
Activation characteristics of four different Mongolian coals were investigated. The coals were carbonized at temperatures of 550 °C and the obtained samples were activated by preheated steam. The pore size, pore volume and surface areas of all activated carbons (AC) have been determined by adsorption of nitrogen (N2) gas. The BET surface areas of Aduunchuluun (ACAC), Shivee Ovoo (SCAC), Baganuur (BCAC) coal and Ulaan Ovoo coals (UCAC) are 283, 205, 251 and 460 m2/g respectively. Langmuir surface area is 283 m2/g of ACAC, 230 m2/g of SCAC, 537 m2/g in UCAC and 254 m2/g in BCAC.
Highlights
Coals of varying quality are considered to be an abundant source for the manufacturing of activated carbons (AC)
We have investigated above mentioned 4 coals from different deposits in Mongolia by physical activation method
Each coal sample was carbonized by pyrolysis at 550-650 °C for 120 min for the porous characteristics such as BET and Langmuir surface area, pore volume and pore size in ACs obtained from the coals
Summary
Coals of varying quality are considered to be an abundant source for the manufacturing of activated carbons (AC). Each coal sample was carbonized by pyrolysis at 550-650 °C for 120 min for the porous characteristics such as BET and Langmuir surface area, pore volume and pore size in ACs obtained from the coals. The reactor was switched on and the temperature was increased with the heating rate of 20 °C/min up to 550 - 600 °C At this final temperature, the carbonization was continued for 120 minutes. The solid residue called as a semi-coke obtained from the thermal decomposition of coal has been used as a sample for the preparation of activated carbon. The methodology for the determination of surface area, pore volume, pore size: The surface area of the activated carbon was determined by the adsorption of nitrogen with the flow rate of 3 cm3/min at STP.
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