组分特性对焦油黏附的影响及作用机理研究  

Investigation on Effects and Mechanisms of Component Characteristics on Adhesion Properties of Tar

作　　者：吴扬威 李爱军[1] 易琳琳 雷苏 满高智 邓倩 刘欢[2] 姚洪[2] WU Yangwei;LI Aijun;YI Linlin;LEI Su;MAN Gaozhi;DENG Qian;LIU Huan;YAO Hong(School of Energy and Power Engineering,Huazhong University of Science and Technology,430074 Wuhan,China;State Key Laboratory of Coal Combustion,Huazhong University of Science and Technology,430074 Wuhan,China)

机构地区：[1]华中科技大学能源与动力工程学院,武汉430074 [2]华中科技大学煤燃烧国家重点实验室,武汉430074

出　　处：《煤炭转化》2022年第5期1-9,共9页Coal Conversion

基　　金：国家自然科学基金面上项目(52076092).

摘　　要：在自行设计的焦油在线发生黏附实验台架上研究了不同焦油种类(重质生物油、轮胎热解油、废弃油脂)和不同冷凝温度(100℃,200℃)下焦油的冷凝黏附特性,并通过高分辨傅立叶变换质谱仪(FT-MS)对黏附焦油组分进行分析表征,考察了分子质量、氧原子数和分子结构对焦油黏附能力的影响。结果表明:重质生物油的黏附总量约为其他两种固体废物热解焦油黏附总量的2倍,废弃油脂的黏附总量则略高于轮胎热解油的黏附总量。三种固体废物热解焦油在200℃下的黏附量均大于在100℃下的黏附量。分子质量、氧原子数和分子结构会对焦油黏附能力造成影响,分子质量在300 Da~400 Da的组分更易发生黏附,焦油中含氧组分较烃类物质具有更强的黏附能力,含氧组分中环状含氧组分较链状含氧组分更易黏附。总体而言,大分子质量、高氧含量及多环状结构的焦油组分黏附能力更强。不同固体废物焦油因其组分特性不同,其黏附主导因素不同,三因素之间存在交互作用。小分子质量、高氧含量及多环状结构可以使得焦油组分露点温度下降,在较低温度冷凝黏附。This paper aimed to explore effects and mechanisms of component characteristics on the adhesion properties of tar.The impacts of tar type(heavy bio-oil,tire pyrolysis oil,waste vegetable oil)and condensation temperature(100℃,200℃)on the condensation adhesion characteristics of tar were studied by using a self-designed experimental bench with online evaporation-adhesion of tar.The effects of molecular weight,the number of oxygen atoms and molecular structure on the tar adhesion characteristics were investigated by characterizing tar components with the Fourier transform ion cyclotron resonance mass spectrometer(FT-MS).The results show that the total adhesion amount of heavy bio-oil is about twice that of the other two types of oil from solid waste pyrolysis,and the total adhesion amount of waste vegetable oil is slightly higher than that of tire pyrolytic oil.The adhesion amount of three types of pyrolytic oil from solid waste at 200℃is greater than that at 100℃.Molecular weight,the number of oxygen atoms and molecular structure are proved to have influence on the adhesion abilities of tar.Components with molecular weight of 300 Da-400 Da are more likely to adhere.Oxygenated components in tar has stronger adhesion abilities than hydrocarbons,and the ringed oxygenated components are easier to adhere than chain oxygenated components.Totally,tar components with large molecular weight,high oxygen content and multi-ring structure are more possible to adhere.Different pyrolytic oils from solid waste have different component characteristics,resulting in the discrepancy in the leading factors affecting their adhesion properties,and there is an interaction among the three factors.Low molecular weight,high oxygen content and multi-ring structure can reduce the dew point temperature of tar components and induce them to condense and adhere at a relatively low temperature.

关 键 词：重质焦油 组分特性 焦油黏附 影响因素 交互作用 

分 类 号：TQ522.51[化学工程—煤化学工程]