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Experimental study on pyrolysis gas products of chlorinated polyvinyl chloride and its smoke properties during combustion

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Abstract

The pyrolysis gas products of chlorinated polyvinyl chloride (CPVC) are first discussed based on thermogravimetry–Fourier transform infrared spectra–mass spectrometry (TG–FTIR–MS) analysis. The results of TG–FTIR preliminarily show that CPVC pyrolysis can be divided into two stages: the main gas products or functional groups are hydrogen chloride (HCl), chlorinated compounds, alkanes, alkenes and aromatic compounds in Stage I, while alkanes, aromatic compounds and alkenes in Stage II. By coupling MS, the main products can be further refined into hydrogen chloride and benzene in Stage I, while homologues, derivatives and polycyclic aromatic compounds of benzene (xylene and ethylbenzene, chlorobenzene and 1-chloronaphthalene, naphthalene and fluorene and so on) in Stage II. Moreover, compared with the pyrolysis gas products of PVC, chlorine is not completely converted into hydrogen chloride, and some of it is converted into other chlorinated compounds. Based on the above results, the possible reactions from molecular structure during CPVC pyrolysis are also put forward. Furthermore, the CPVC combustion properties and smoke production in cone calorimeter experiment are analyzed by the measured mass loss rate, heat release rate, smoke and CO/CO2 production rate.

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Acknowledgements

The authors would like to acknowledge financial support sponsored by National Natural Science Foundation of China (No. 51806202) and Jiangsu Key Laboratory of Hazardous Chemicals Safety and Control (No. HCSC201901).

Funding

National Natural Science Foundation of China, 51806202, Yanming Ding, Jiangsu Key Laboratory of Hazardous Chemicals Safety and Control, HCSC201901, Yanming Ding.

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Authors and Affiliations

  1. College of Power Engineering, Naval University of Engineering, Wuhan, 430003, China

    Ang Li

  2. Faculty of Engineering, China University of Geosciences, Wuhan, 430074, China

    Biqing Huang, Wenlong Zhang & Yanming Ding

  3. Jiangsu Key Laboratory of Urban and Industrial Safety, College of Safety Science and Engineering, Nanjing Tech University, Nanjing, 211800, China

    Ru Zhou

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  1. Ang Li
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Contributions

AL and BH were involved in the methodology, validation, data curation, and writing. WZ contributed to the methodology, and writing. YD was involved in the supervision, funding acquisition, project administration, and writing. RZ contributed to the data curation.

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Correspondence to Biqing Huang or Yanming Ding.

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Li, A., Huang, B., Zhang, W. et al. Experimental study on pyrolysis gas products of chlorinated polyvinyl chloride and its smoke properties during combustion. J Therm Anal Calorim 147, 8213–8224 (2022). https://doi.org/10.1007/s10973-021-11156-9

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