Chemical recycling of plastic waste via production of ethylene from gasification syngas
Research output: Thesis › Master's Thesis
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2024.
Research output: Thesis › Master's Thesis
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TY - THES
T1 - Chemical recycling of plastic waste via production of ethylene from gasification syngas
AU - Maier, Matthias
N1 - embargoed until 06-05-2025
PY - 2024
Y1 - 2024
N2 - A plastic waste to ethylene (PtE) process through steam-oxygen gasification, methanation and oxidative coupling of methane was investigated. Gasification was modelled using a stochastic reactor model, while the downstream process was modelled using Aspen Plus. This study investigated two cases, one with venting of captured CO2 and one with CO2 compression and transport. In addition, two alternative feedstocks and their effect on the process were explored.The model was evaluated from a technical, economic, and ecological perspective. For the ecological evaluation, the investigated plastic recycling process was compared to naphtha steam cracking, and it was found that 5.7-18.4 kgCO2eq/kg ethylene can be avoided. The minimum ethylene sales price was found using a discounted cashflow calculation and is between 4.9-5.4 €/kg. This leads to costs of CO2 avoided between 230-666 €/tCO2eq. Moreover, a sensitivity analysis on costs of CO2 avoided using 20,000 random parameter values was conducted.
AB - A plastic waste to ethylene (PtE) process through steam-oxygen gasification, methanation and oxidative coupling of methane was investigated. Gasification was modelled using a stochastic reactor model, while the downstream process was modelled using Aspen Plus. This study investigated two cases, one with venting of captured CO2 and one with CO2 compression and transport. In addition, two alternative feedstocks and their effect on the process were explored.The model was evaluated from a technical, economic, and ecological perspective. For the ecological evaluation, the investigated plastic recycling process was compared to naphtha steam cracking, and it was found that 5.7-18.4 kgCO2eq/kg ethylene can be avoided. The minimum ethylene sales price was found using a discounted cashflow calculation and is between 4.9-5.4 €/kg. This leads to costs of CO2 avoided between 230-666 €/tCO2eq. Moreover, a sensitivity analysis on costs of CO2 avoided using 20,000 random parameter values was conducted.
KW - Chemisches Recycling
KW - Dampf-Sauerstoff Vergasung
KW - Oxidative Kopplung von Methan
KW - Kosten von vermiedenem CO2
KW - Chemical recycling
KW - steam-oxygen gasification
KW - oxidative coupling of methane
KW - cost of CO2 avoided
U2 - 10.34901/mul.pub.2024.176
DO - 10.34901/mul.pub.2024.176
M3 - Master's Thesis
ER -