Chemical Recycling of Plastic Waste via Production of Ethylene from Gasification Syngas
Matthias Maier, Corinna Netzer, Thomas A. Adams
Abstract
High Resolution Image Download MS PowerPoint Slide We investigated the plastic waste to ethylene (PtE) process through steam-oxygen gasification, methanation, and oxidative coupling of methane. Gasification was modeled using a stochastic reactor model, while the downstream process was modeled using Aspen Plus. The carbon efficiency of the process ranges from 13 to 23%, depending on feedstock used. We investigated a base case scenario with CO 2 venting and a case with CO 2 compression and transport. While 5.7 kgCO 2eq /kg ethylene can be avoided in the former one, the latter one leads to an avoidance of 18.4 kgCO 2eq /kg ethylene. The costs of CO 2 avoided are 666 €/tCO 2eq and 230 €/tCO 2eq, respectively.