Pieter Billen is associate professor at the department Chemistry/Biochemistry of the Faculty of Applied Engineering. He is spokesperson of the iPRACS research group (Intelligence in Processes, Advanced Catalysts & Solvents). He is a chemical engineer and obtained his PhD in engineering in 2015 at KU Leuven, with a dissertation on biomass combustion. He worked in 2015-2016 at Drexel University (Philadelphia, PA, USA) and started in 2017 at UAntwerp. He is expert in circularity of organic materials, with a current focus on advanced plastics recycling.