Web Seminar: Easy, Matrix-independent Quantification of Chlorine in the Plastic Feedstock Chemical Recycling of Plastics

Content and goals of the Web Seminar

Duration: ~30 min
Language: English
Speaker:
Angela Gröbel, Product Manager CNSX and AOX, Analytik Jena
Simone Moos, Technical Product Manager, Analytik Jena
Stefan Jezierski, Application Specialist Chemical Analysis, Analytik Jena

During the chemical recycling of plastics, many challenges need to be overcome on the way from plastic waste to ultra-pure monomers. The presence of undesired contaminants in the plastic feedstock is one of those challenges. Particularly chlorine can quickly reach problematic levels when PVC is mixed into the plastic feedstock. During processing, chlorinated polymers produce HCl gas, which is highly corrosive to the pyrolysis unit and the stream cracker. A strict quality control of the incoming plastic feedstock is therefore essential in order to protect these expensive processing units from corrosion.

Inhomogeneous and vigorously reacting matrices, such as polymer waste, are quite difficult to analyze with good results. There are many different approaches, all of which have their advantages and limitations. In this web seminar we will highlight high temperature combustion coupled with micro-coulometric titration, which has proven to be best suited. It can handle a wide range of polymer types and strongly varying chlorine concentrations.

This web seminar will highlight:

• Sample preparation and handling
• Strategies for quantitative combustion of plastic waste and other organic-rich material
• Quantification of total chlorine over a wide concentration range by micro coulometric titration
• Data evaluation
• Method optimization