用废弃印刷线路板非金属组分分离物制备多孔炭(英文)

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

以FR-3型废旧印刷线路板非金属分离物为前躯体,经热解、物理活化/化学活化制备活性炭。研究了热解温度对残碳收率的影响,活化反应条件对活性炭烧蚀率、孔结构的影响。结果表明,随着热解温度的提高残碳收率下降。以600℃热解的残碳为原料,加入煤焦油沥青做粘结剂,经成型、破碎,800℃炭化,再经水蒸气850℃活化3 h,可制得比表面积为1 019 m2·g-1、孔容为1.1 cm3.g-1的粒状活性炭;而以600℃热解的残炭为原料,加入KOH,在900℃活化2 h,可制得比表面积为3 112 m2.g-1、孔容为1.13 cm3·g-1的粉状活性炭。

Non-metallic fractions of FR-3 type waste printed circuit boards were pyrolyzed at high temperatures. The resultant char at 600℃ was used to prepare activated carbons by physical and chemical activation. The influence of pyrolysis temperature on char yields, and activation conditions on the bum-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 1 019 m2 .g-1 and a pore volume of 1.1 cm3 ·g-1 can be obtained by moulding, pyrolysis and physical activation using H20 as an activation agent. An activated car- bon powder with a surface area of 3 112 m2 ·g-1and a pore volume of 1.13 cm3 ·g-1 can be achieved by KOH activation.