Preparation of porous carbons from non-metallic fractions of waste printed circuit boards by chemical and physical activation

Abstract

Non-metallic fractions of FR-3 type waste printed circuit boards were pyrolyzed at high temperatures. The resultant char at 600 °C was used to prepare activated carbons by physical and chemical activation. The influence of pyrolysis temperature on char yields, and activation conditions on the burn-off and porous properties of the activated carbons were investigated. Results show that char yields decrease with pyrolysis temperature. A granular activated carbon with a surface area of 1019 m 2 g −1 and a pore volume of 1.1 cm 3 g −1 can be obtained by moulding, pyrolysis and physical activation using H 2 O as an activation agent. An activated carbon powder with a surface area of 3112 m 2 g −1 and a pore volume of 1.13 cm 3 g −1 can be achieved by KOH activation. [New Carbon Materials 2013, 28(2): 108–114]