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<p>For the purpose of studying catalytic effect of ZSM-5 zeolite, the pyrolysis features and kinetics of poly(methyl methacrylate) (PMMA) blended with ZSM-5 zeolite of various contents have been comprehensively conducted by means of non-isothermal thermogravimetric measurements and various analysis methods. The onset pyrolysis temperature of PMMA blends is seen to be much higher than that of PMMA and it increases substantially as the zeolite content rises. Nevertheless, the pyrolysis rate constant has been enhanced, evidenced the catalytic zeolite effect for these blends. The activation energies are estimated by using isoconversional model-free methods while pre-exponential factor is model-freely gained according to linear compensation effect. The Gaussian deconvolution method has been attempted for separating the mass loss rate curves and producing two parallel sub-reactions. With the Master-plots and differential composite methods, the order-based models are observed to be the most suitable mechanism functions for describing the global pyrolysis of three blend processes and their sub-reactions. The findings gained here can provide necessary information for performing any pyrolysis designs of PMMA wastes.</p>

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Assessment of catalytic ZSM-5 zeolite effect on pyrolysis of PMMA: pyrolysis features, kinetic analysis and Gaussian deconvolution

  • 期刊论文

  • 发表日期：

    2025年9月23日

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  • Yu-jiang Liu,
  • Zhen Huang

摘要

For the purpose of studying catalytic effect of ZSM-5 zeolite, the pyrolysis features and kinetics of poly(methyl methacrylate) (PMMA) blended with ZSM-5 zeolite of various contents have been comprehensively conducted by means of non-isothermal thermogravimetric measurements and various analysis methods. The onset pyrolysis temperature of PMMA blends is seen to be much higher than that of PMMA and it increases substantially as the zeolite content rises. Nevertheless, the pyrolysis rate constant has been enhanced, evidenced the catalytic zeolite effect for these blends. The activation energies are estimated by using isoconversional model-free methods while pre-exponential factor is model-freely gained according to linear compensation effect. The Gaussian deconvolution method has been attempted for separating the mass loss rate curves and producing two parallel sub-reactions. With the Master-plots and differential composite methods, the order-based models are observed to be the most suitable mechanism functions for describing the global pyrolysis of three blend processes and their sub-reactions. The findings gained here can provide necessary information for performing any pyrolysis designs of PMMA wastes.