废弃印刷线路板共热解影响因素及热解产物表征  

Factors that affects co-pyrolysis of waste printed circuit board and characterization of pyrolysis products

作　　者：方贵琳 陈维芳[1] 舒永开 王叶贵 黎永伦 FANG Guilin;CHEN Weifang;SHU Yongkai;WANG Yegui;LI Yonglun(School of Environment and Architecture,University of Shanghai for Science and Technology,Shanghai 200093)

机构地区：[1]上海理工大学环境与建筑学院,上海200093

出　　处：《能源研究与信息》2022年第4期210-217,共8页Energy Research and Information

基　　金：上海市自然科学基金项目(19ZR1928900)。

摘　　要：热解是资源化利用废弃印刷线路板的重要方法之一。分别以沸石和Fe_(3)O_(4)为共热解剂,探讨了共热解剂与废弃线路板的质量比以及热解温度对液相产物产率的影响,并对热解后固、液、气三相产物进行了表征。结果表明,共热解剂的添加不会影响热解油的产率,但可有效降低液相中溴化有机物的含量。热解液相产物组分分析结果表明,直接热解废弃线路板时会有大量溴化有机物释放到液相产物中。加入共热解剂后,苯酚及其同系物成为液相产物的主要成分,溴变成主要以无机溴化物的形式存在。同时,不同共热解剂对废弃线路板的热解影响也不同。Fe_(3)O_(4)共热解时,液相产物中小分子苯类物质更多,这可能是由于铁类物质对大分子有机物的分解作用更强。共热解剂在高温下比较稳定,热解后固体主要含有共热解剂、玻璃纤维以及重金属,而热解气的主要成分则为H_(2)、CH_(4)和CO_(2)。Pyrolysis was one of the methods employed for waste printed circuit board(WPCB)recycle.In this research,WPCB was co-pyrolyzed with zeolite and Fe_(3)O_(4),the effects of mass ratio and temperature on liquid yield was investigated.In addition,solid,liquid and gaseous products from pyrolysis were characterized in details.Results showed that the addition of co-pyrolysis reagent did not affect liquid yield.The release of Br-containing organics into liquid was effectively suppressed.Analysis of liquid compositions revealed that Br-containing organics were found in liquid when WPCB was pyrolyzed alone.With the addition of co-pyrolysis reagent,phenol and its homologues predominated.Inorganic Br became the major form of Br compounds.The effects of co-pyrolysis reagent varied.The addition of Fe_(3)O_(4)led to the generation of more small-molecule benzene products.This could be attributed to the fact that iron oxides were effective in breaking up macro-molecule organics in WPCB.Co-pyrolysis reagents were stable under high temperature.And the resultant solid products from pyrolysis were mainly composed of these reagents together with glass fiber and heavy metals from WPCB.On the other hand,pyrolysis gases were mainly composed of H_(2),CH_(4)and CO_(2).

关 键 词：废弃印刷线路板 共热解 液相产率 共热解剂 

分 类 号：TU991.2[建筑科学—市政工程]