Life Cycle Assessment of Synthetic Natural Gas Production from Different CO2 Sources: A Cradle-to-Gate Study

Energies

Jutta Geldermann¹  Umberto Desideri²  Marco Antonelli²  Eleonora Bargiacchi²  Nils Thonemann³ 

[1] Business Administration and Production Management, University of Duisburg-Essen, 47057 Duisburg, Germany;Department of Energy, Systems, Territory and Construction Engineering (DESTeC), University of Pisa, 56122 Pisa, Italy;Fraunhofer Institute for Environmental, Safety, and Energy Technology, UMSICHT, 46047 Oberhausen, Germany;

关键词: Carbon Capture Utilization;    energy storage;    Life Cycle Assessment;    Power-to-Gas;   

DOI  :  10.3390/en13174579

来源: DOAJ

【 摘 要 】

Fuel production from hydrogen and carbon dioxide is considered an attractive solution as long-term storage of electric energy and as temporary storage of carbon dioxide. A large variety of CO₂ sources are suitable for Carbon Capture Utilization (CCU), and the process energy intensity depends on the separation technology and, ultimately, on the CO₂ concentration in the flue gas. Since the carbon capture process emits more CO₂ than the expected demand for CO₂ utilization, the most sustainable CO₂ sources must be selected. This work aimed at modeling a Power-to-Gas (PtG) plant and assessing the most suitable carbon sources from a Life Cycle Assessment (LCA) perspective. The PtG plant was supplied by electricity from a 2030 scenario for Italian electricity generation. The plant impacts were assessed using data from the ecoinvent database version 3.5, for different CO₂ sources (e.g., air, cement, iron, and steel plants). A detailed discussion on how to handle multi-functionality was also carried out. The results showed that capturing CO₂ from hydrogen production plants and integrated pulp and paper mills led to the lowest impacts concerning all investigated indicators. The choice of how to handle multi-functional activities had a crucial impact on the assessment.

【 授权许可】

Unknown