摘要
采用GC/MS检测,研究最终温度（400、500和600℃）和升温速率（5、10和15℃/min）对废旧电路板真空热解油的成分的影响。研究表明,最终温度过高（600℃）、升温速率较小（5℃/min）或较大（15℃/min）都不利于热解油的形成,反而增大不凝气的产量。升高最终温度会增强较低碳数物质的热解效果,产生更多的不凝气;但同时也会限制较高碳数物质的热解,出现较多的环化、聚合反应生成结构复杂的物质。升温速率较高（15℃/min）,会产生大量不饱和物质,其在后续发生环化、聚合等反应,生成更多的C14~C18,C6~C9含量则大幅下降。从热解油产量和GC/MS检测结果看,升温速率为10℃/min、最终温度为500℃和恒温1 h,热解充分,热解油C6~C9含量高,有较高的综合利用价值。
This study focused on the effect of final temperature（ 400,500 and 600℃） and heating rate（ 5,10 and 15℃ /min） on the constituents of printed circuit board vacuum pyrolysis oil by using GC/MS. The results indicate that high final temperature（ 600℃） or extreme heating rate（ lower than 5℃/min or higher than15℃/min） inhibited the formation of pyrolysis oil and generated more gases. A higher final temperature made substances of low carbon number fully pyrolysed which introduced more incondensable gases,meanwhile restricted the pyrolysis of substances of high carbon number resulting in more reaction of cyclization and polymerization and eventually produce some complex structures. Larger amount of unsaturated substances were produced during the pyrolysis of WPCBs with a higher heating rate（ 15℃/min）. This unsaturated substances carried out the subsequent reaction of cyclization and polymerization,forming more C14 ~ C18,with significant reduction of C6 ~C9. From the yield of pyrolysis oil and results of GC/MS,it is concluded that sufficient pyrolysis（ high content of C6 ~ C9 in pyrolysis oil） with high quality of utilizations can be attained at a heating rate of 10℃/min and a constant temperature of 500℃ for 1 hour.
出处
《环境工程学报》
CAS
CSCD
北大核心
2014年第3期1185-1190,共6页
Chinese Journal of Environmental Engineering
基金
广东省科技计划项目(2012B031000017)
高等学校博士学科点项科研基金(20114420110005)
广东省教育部产学研结合项目(2011B090400144)
广东省重大科技专项资助(2010A080804002)
关键词
废旧电路板
热解条件
溴化环氧树脂
真空热解油
waste printed circuit board
pyrolysis condition
brominated epoxy resin
vacuum pyrolysis oil
