微藻与塑料混合热解的热解特性和动力学研究  

Pyrolysis characteristics and kinetics of co-pyrolysis of microalgae and plastics

作　　者：唐紫玥 陈伟 陈旭[3] 陈应泉[1] 胡强[1] 成伟 杨海平[1] 陈汉平[1] TANG Zi-yue;CHEN Wei;CHEN Xu;CHEN Ying-quan;HU Qiang;CHENG Wei;YANG Hai-ping;CHEN Han-ping(State Key Laboratory of Coal Combustion,School of Energy and Power Engineering,Huazhong University of Science and Technology,Wuhan 430074,China;College of Engineering,Nanjing Agricultural University,Nanjing 210095,China;School of Modern Industry for Selenium Science and Engineering,Wuhan Polytechnic University,Wuhan 430023,China)

机构地区：[1]华中科技大学能源与动力工程学院,煤燃烧国家重点实验室,湖北武汉430074 [2]南京农业大学工学院,江苏南京210095 [3]武汉轻工大学硒科学与工程现代产业学院,湖北武汉430023

出　　处：《燃料化学学报（中英文）》2023年第8期1145-1154,共10页Journal of Fuel Chemistry and Technology

基　　金：国家自然科学基金杰出青年项目(52125601);国家重点研发计划项目(2018YFB1501403)资助。

摘　　要：本研究利用TG-FTIR研究了微藻和聚乙烯(PE)、聚苯乙烯(PS)和聚丙烯(PP)混合热解特性,探讨了塑料添加比及塑料结构对热解失重和挥发分释放特性以及动力学的影响。微藻与塑料混合热解存在交互作用,使塑料的热解温度升高,并抑制焦炭形成,其中,PE能有效地减少残余物产率,而PS混合热解时其热解温度明显升高。并且微藻与塑料混合热解能降低热解过程中的平均活化能,且在较低比例塑料添加时作用较强。此外,微藻与聚乙烯混合会促进CO_(2)的释放以及聚乙烯断键生成-CH_(3)和C=C-H。微藻与聚丙烯混合却抑制CO_(2)的释放,加剧了聚丙烯生成芳烃C-H。而微藻与聚苯乙烯混合会轻微促进C=O和NH_(3)生成,并加剧微藻的氢转移和聚苯乙烯苯环断裂释放-CH_(3)。Plastics as co-feeding can effectively improve the quality of microalgae pyrolysis oil.The effects of co-pyrolysis of microalgae and polyethylene(PE),polystyrene(PS)and polypropylene(PP)on pyrolysis characteristics and kinetics were investigated by TG-FTIR.There is an interaction between microalgae and plastic,which increases the pyrolysis temperature of plastic and inhibits the formation of coke.PE can effectively reduce the residual yield,while the pyrolysis temperature of PS obviously transfers to high temperature during co-pyrolysis.In addition,co-pyrolysis reduces the average activation energy,especially low proportion of plastic.Besides,the co-pyrolysis of microalgae with PE promotes C−C fracture to release CO_(2) and−CH_(3) and C=C−H.However,the co-pyrolysis of microalgae and PP inhibits the release of CO_(2),and intensifies the formation of aromatic hydrocarbon C−H from polypropylene.Moreover,the co-pyrolysis of microalgae and PS can slightly promote the formation of C=O and NH_(3),and aggravate the hydrogen transfer of microalgae to break aromatic ring of polystyrene and release CH_(3).

关 键 词：微藻 塑料 混合热解 TG-FTIR 动力学 

分 类 号：TK6[动力工程及工程热物理—生物能]