State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology
College of Engineering, Nanjing Agricultural University
School of Modern Industry for Selenium Science and Engineering, Wuhan Polytechnic University

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CO2的释放以及聚乙烯断键生成–CH3和C=C–H。微藻与聚丙烯混合却抑制CO2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NH3生成，并加剧微藻的氢转移和聚苯乙烯苯环断裂释放–CH3。

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 CO2 and −CH3 and C=C−H. However, the co-pyrolysis of microalgae and PP inhibits the release of CO2, 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 NH3, and aggravate the hydrogen transfer of microalgae to break aromatic ring of polystyrene and release CH3.

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

唐紫玥, 陈伟, 陈旭, 陈应泉, 胡强, 成伟, 杨海平, 陈汉平. 微藻与塑料混合热解的热解特性和动力学研究[J]. 燃料化学学报（中英文）, 2023, 51(8): 1145-1154.

TANG Zi-yue, CHEN Wei, CHEN Xu, CHEN Ying-quan, HU Qiang, CHENG Wei, YANG Hai-ping, CHEN Han-ping. Pyrolysis characteristics and kinetics of co-pyrolysis of microalgae and plastics[J]. Journal of Fuel Chemistry and Technology, 2023, 51(8): 1145-1154.