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Waste poly (vinyl chloride) pyrolysis with hydrogen chloride abatement by steelmaking dust

  • Jakub Korpas , Václav Slovák and Kamil Wichterle EMAIL logo
Published/Copyright: April 21, 2016
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Chemical Papers
From the journal Chemical Papers Volume 70 Issue 7

Abstract

Experimental study on PVC-based materials (PVC = poly (vinyl chloride)) pyrolysis; in the presence of various amounts of steelmaking dust was performed. Dust from steel manufacture employing zinc plated scrap contains a considerable amount of zinc oxide (ZnO) and its utilization in metallurgy is quite complicated. However, the dust can react with hydrogen chloride (HCl) released from heated PVC in the temperature range of 200–400°C. Material balance of the pyrolysis process was studied by thermogravimetry, and the data obtained were compared with the results of larger laboratory oven experiments. In excess of PVC, the amount of captured HCl stoichiometrically corresponds to the content of ZnO; additional HCl is probably captured by FeCl2, while FeCl3 is not formed at elevated temperatures. In excess of the dust, the captured amount of HCl is approximately 100 %. The suggested co-pyrolysis seems to be a promising method to prevent the formation of dangerous chlorinated organic compounds during the thermal treatment of waste PVC. Furthermore, the obtained ZnCl2 is a valuable material and the zinc depleted dust can be reused in metallurgy instead of its disposal.

Keywords: waste PVC; steelwork dust; thermogravimetry; pyrolysis; zinc chloride

Acknowledgements

The work has been performed as part of the project LO1208 “Theoretical Aspects of Energetic Treatment of Waste and Environment Protection against Negative Impacts” financially supported by the Ministry of Education, Youth and Sports of the Czech Republic in the “National Feasibility Program I. A part of the work has been financed by the Structural Funds of the European Union and from the means of the state budget of the Czech Republic within the frame of the project “Institute of Environmental Technologies”, reg. no. CZ.1.05/2.1.00/03.0100, supported by the Research and Development for Innovations Operational Program.

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Received: 2015-8-2
Revised: 2015-11-30
Accepted: 2015-12-1
Published Online: 2016-4-21
Published in Print: 2016-7-1

© 2016 Institute of Chemistry, Slovak Academy of Sciences

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https://doi.org/10.1515/chempap-2016-0025
Keywords for this article
waste PVC; steelwork dust; thermogravimetry; pyrolysis; zinc chloride

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