添加物对废弃环氧电路板真空热解产物的影响

Effect of additives on product of vacuum pyrolysis of waste epoxy printed circuit boards

采用程序升温控制的电阻炉,在自制的裂解反应器中对废弃电路板环氧树脂进行在真空条件下的热解实验,并考察金属、金属氧化物和分子筛共12种添加物对废弃电路板环氧树脂真空热解产物产率的影响。利用元素分析仪和SEM-EDS对环氧树脂电路板组成进行分析,对不同添加物与废弃电路板环氧树脂共热裂解得到的裂解油进行FT-IR和GC-MS检测,对其主要组分进行结构鉴定和分析。研究结果表明:Fe2O3和金属添加物(Cu和Fe)使热解油产率降到最低(30.0%);从热解油中鉴定出20种物质,其中主要成分为苯酚和异丙基苯酚;金属铁及其氧化物能有效降低裂解油中的溴化物含量。

Printed circuit boards（PCBs） without metals and electronic components were pyrolysed in a pipe furnace to separate and recover the organic.The elemental composition of PCBs was analyzed by elemental analyzer and SEM-EDS.PCBs were pyrolysed under control with temperature controller with a series of additives respectively,and the pyrolysis products were analyzed using FT-IR,GC-MS.The results show Fe2O3 and metal additives lead the pyrolysis oil yield reduce to 30.0%.Twenty products in pyrolysis oil can be identified and the main components in the pyrolysis oil are phenol and 4-isopropylphenol.Iron and metal oxides can reduce the bromine content of pyrolyisis oil effectively.