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微藻与塑料混合热解的热解特性和动力学研究

唐紫玥 陈伟 陈旭 陈应泉 胡强 成伟 杨海平 陈汉平

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. doi: 10.19906/j.cnki.JFCT.2023008
引用本文: 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. doi: 10.19906/j.cnki.JFCT.2023008
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. doi: 10.19906/j.cnki.JFCT.2023008
Citation: 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. doi: 10.19906/j.cnki.JFCT.2023008

微藻与塑料混合热解的热解特性和动力学研究

doi: 10.19906/j.cnki.JFCT.2023008
基金项目: 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
详细信息
    通讯作者:

    Tel: 027-87542417-8211, E-mail: yhping2002@ 163.com

  • 中图分类号: TK6

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

Funds: The project was supported by the National Natural Science Foundation of China Outstanding Youth Program (52125601) and National Key Research and Development Program (2018YFB1501403)
  • 摘要: 塑料作为共热解原料能有效提高微藻热解油品质。本文利用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能有效的减少残余物产率,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
  • 图  1  微藻与塑料混合热解的TG曲线(a)(c)(e)和DTG曲线(b)(d)(f)

    Figure  1  TG curves and DTG curves of co-pyrolysis of microalgae and plastics

    图  2  共热解过程中TG失重与实验计算结果的偏差

    Figure  2  Deviation of TG weight loss between experimental and calculated results during co-pyrolysis process

    图  3  微藻(a)和塑料(b)热解挥发分主要特征峰随温度的变化微藻

    Figure  3  Variation of the main volatiles of microalgae (a) and plastic (b) pyrolysis with temperature

    图  4  微藻和塑料混合热解时热解挥发分主要特征峰随温度的变化

    Figure  4  Variation of the main volatiles from co-pyrolysis of microalgae and plastic with temperature

    图  5  25%塑料添加比时热解挥发分FTIR强度差值

    Figure  5  The FTIR intensity difference of pyrolytic volatiles at 25% plastic addition ratio

    图  6  微藻和塑料混合热解过程的平均活化能与理论值比

    Figure  6  Value of the Em。cal/ Em during co-pyrolysis of microalgae and plastics

    表  1  样品的工业分析和元素分析(d)

    Table  1  Proximate, ultimate analysis of samples and biochemical constituents of microalgae

    SamplesElemental analysis /wt.%Proximate analysis/wt.%
    CHNOMVFCA
    NS50.67.36.729.44.079.610.46.0
    PE84.315.50.2100.0
    PS91.47.51.197.22.8
    PP84.914.70.699.90.1
    ①: calculated by difference; ②: undetected
    下载: 导出CSV

    表  2  基于Doyle 和Coats-Redfern法计算的微藻和塑料混合热解的动力学参数

    Table  2  Kinetic parameters for the co-pyrolysis of microalgae and plastics via Doyle and Coats-Redfern method

    SamplesTemperature(℃)Coats-RedfernDoyleEm
    (kJ·mol−1)
    E(kJ·mol−1)A(s)R2E(kJ·mol−1)A(s)R2
    NS216–35747.912.7E + 010.996954.313.4E + 020.998737.04
    357–52616.152.0E-020.985626.382.4E + 000.9964
    25%PE231–36141.423.6E + 000.988948.316.0E + 010.993566.21
    361–4589.651.7E-030.975219.954.5E-010.9943
    458–495149.762.3E + 080.9862154.275.9E + 080.9882
    50%PE252–34537.979.2E-010.989245.111.8E + 010.9937130.79
    345–4427.144.1E-040.976617.341.5E-010.9968
    442–494205.481.9E + 120.9796207.132.7E + 120.9817
    75%PE285–34132.991.4E-010.987240.623.8E + 000.9928208.20
    341–4327.592.2E-040.978517.647.4E-020.9962
    432–492267.094.3E + 160.9862265.653.5E + 160.9873
    PE432–486321.043.4E + 200.9960316.751.9E + 200.9963318.89
    25%PS221–35242.545.7E + 000.995149.268.9E + 010.997246.58
    352–41816.441.3E-020.986926.041.4E + 000.9949
    418–47577.712.6E + 030.979085.212.2E + 040.9843
    50%PS244–33743.164.1E + 000.990949.916.4E + 010.994474.29
    337–41318.651.3E-020.987427.971.1E + 000.9945
    413–472125.051.1E + 070.9851130.133.5E + 070.9876
    75%PS290–33739.315.8E-010.996546.641.1E + 010.9979176.53
    337–39116.802.8E-030.977626.042.7E-010.9908
    391–448221.332.7E + 140.9831221.392.8E + 140.9846
    PS375–431267.912.0E + 180.9919265.331.4E + 180.9925266.62
    25%PP174–35347.901.5E + 010.998053.891.8E + 020.998861.55
    354–45317.521.3E-020.992027.171.3E + 000.9970
    465–504118.071.7E + 060.9929123.976.6E + 060.9941
    50%PP197–33749.371.3E + 010.997855.221.4E + 020.9984124.06
    354–44215.654.7E-030.992525.235.3E-010.9971
    459–504179.674.7E + 100.9912182.468.2E + 100.9922
    75%PP229–33756.232.9E + 010.996361.632.4E + 020.9976186.92
    342–42714.831.7E-030.989924.312.1E-010.9961
    449–498236.055.2E + 140.9911235.985.3E + 140.9918
    PP419–486321.749.5E + 200.9932317.145.0E + 200.9936319.44
    下载: 导出CSV
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  • 收稿日期:  2022-10-29
  • 录用日期:  2022-12-27
  • 修回日期:  2022-12-07
  • 网络出版日期:  2023-01-18

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