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Web Seminar: Solutions for the Analysis of Nitrogen, Sulfur, and Halogens in Pyrolysis Oil Chemical Recycling of Plastics

Content and goals of the Web Seminar

Duration: ~60 min
Language: English
Speaker:
Angela Gröbel, Product Manager CNSX and AOX, Analytik Jena
Simone Moos, Technical Product Manager, Analytik Jena
Theresa Steurer, Application Specialist Combustion Ion Chromatography, Metrohm AG
 

Chemical recycling holds the key to keeping plastics in the loop. Plastic waste is chemically converted into substances that can be reused as raw materials for plastic production. Pyrolysis oil is an intermediate product during this process. Among the main contaminants in pyrolysis oil are nitrogen, sulfur, and halogens. These components can cause fouling, corrosion, and catalyst poisoning during further processing. Therefore, quality control of the pyrolysis oil is essential to optimize its treatment and prevent emissions, extended maintenance cycles, and low-quality hydrocarbon products.

The complexity of chemical recycling is influenced by the raw material entering the process. The plastic waste can have a high diversity in chemical composition and physical properties, resulting in a high variability of the pyrolysis oil. Thus, one of the biggest challenges in analyzing pyrolysis oil is handling the different product grades – from low boilers to heavy cuts. Furthermore, samples can be inhomogeneous, highly viscous, and vigorously reacting, which makes it quite difficult to ensure correct analysis results.

The analysis by pyrolytic and pyrohydrolytic combustion has proven as best suited for the quick and combined determination of all relevant non-metal elements over a uniquely wide concentration range. The presented instruments ensure a safe and quantitative combustion with short analysis times and without the formation of soot. Furthermore, the instruments can not only be utilized for the analysis of pyrolysis oil, but also for the analysis of the plastics entering the chemical recycling process.

This web seminar will highlight:

  • The variable nature of pyrolysis oil – how to simplify sample preparation
  • How to assure quantitative combustion of pyrolysis oils and plastics
  • Combined determination of sulfur, nitrogen, carbon, and total halides
  • Halide speciation – determination of fluorine, chlorine, bromine, and iodine

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