聚苯乙烯高温快速热解制备苯乙烯的研究  

Fast Pyrolysis of Polystyrene to Obtain Styrene at High Temperature

作　　者：徐波昌 唐黎华[1] 吴勇强[1] 倪燕慧[1] 

机构地区：[1]华东理工大学大型工业反应器工程教育部工程研究中心,上海200237

出　　处：《中国塑料》2015年第5期65-69,共5页China Plastics

摘　　要：将聚苯乙烯(PS)溶于甲苯以雾化方式进料,在管式反应器中借助高温短停留时间快速热解制取苯乙烯,探讨了热解温度、停留时间、热解气氛、喷嘴口径等反应条件对热解的影响。结果表明,随停留时间增加,油相和苯乙烯收率总体呈上升趋势;苯乙烯收率随热解温度升高呈先增加后下降趋势,890℃时苯乙烯收率最大达到36.67%;热解气主要为甲烷、乙烯和丙烯,其收率随停留时间和热解温度增加而增加;引入水蒸气可以减少反应结炭;喷嘴口径明显影响油相和苯乙烯收率。A fast pyrolysis process in a tubular reactor was proposed in this paper.Polystyrene was firstly dissolved in toluene and then fed into reactor in an atomized way.The effect of pyrolysis atmosphere,reaction temperature,and retention time on the pyrolysis was investigated.It showed that oil and styrene yield increased with increasing retention time.Styrene yield increased at first and then decreased with increasing reaction temperature,and the maximum styrene yield of 36.67% was obtained at 890 ℃.Pyrolysis gas was mainly methane,ethylene and propylene and gas yield increased with increasing retention time and reaction temperature.Moreover,the addition of water vapor could reduce residual char.In addition,nozzle diameter had an obvious effect on oil and styrene yield.

关 键 词：聚苯乙烯 苯乙烯 热解 收率 

分 类 号：TQ241.21[化学工程—有机化工]