塑料热解油中有机硅化物的形态及含量分析方法  

Qualitative and Quantitative Analysis of Silicon Species in Pyrolysis Oil From Waste Plastic

作　　者：刘明星[1] 吴梅[1] 刘泽龙[1] 章群丹[1] LIU Mingxing;WU Mei;LIU Zelong;ZHANG Qundan(Research Institute of Petroleum Processing,SINOPEC,Beijing 100083,China)

机构地区：[1]中国石化石油化工科学研究院,北京100083

出　　处：《石油学报（石油加工）》2021年第4期909-915,共7页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：国家重点研发计划项目(2019YFC1906305)基金资助。

摘　　要：建立了一种快速测定塑料热解油中有机硅形态的分析方法。采用气相色谱-质谱的选择离子监测模式(SIM)对不同的塑料热解油及其催化裂化反应产品中的硅化物进行定性、定量分析。结果表明,不同的塑料热解油中硅化物主要以环硅氧烷(D n,其中n为硅原子的个数)为主,来源于塑料中的添加剂或硅橡胶的热裂解等。该方法线性相关系数为0.9941~0.9996,检测限和定量限分别为0.002~0.09 mg/L和0.01~0.21 mg/L;加标回收率在91.4%~116.1%,相对标准偏差小于9.6%,符合分析要求。An analytical method for silicon species in pyrolysis oil from waste plastics was developed.Qualitative and quantitative analysis of silicon compounds in different pyrolysis oils from waste plastics were carried out using gas chromatography coupled with mass spectrometry.The results show that the main silicon compounds are cyclic siloxanes(D n,n is the number of silicon atom)from pyrolysis of plastic additive or silicone rubber.The linear correlation coefficients of the standard curves are between 0.9941 and 0.9996,and limit of detection and limit of quantitation are 0.002-0.09 mg/L and 0.01-0.21 mg/L,respectively.The recovery of D n ranged from 91.4%to 116.1%,and the relative standard deviation is less than 9.6%,which meet the demand of conventional analysis.

关 键 词：废塑料 热解油 气相色谱 质谱 环硅氧烷 

分 类 号：O657.63[理学—分析化学]