Energy, Exergy, Economic and Environmental (4E) analysis of integrated direct air capture and CO2 methanation under uncertainty

Diederik Coppitters, Alexis Costa, Remi Chauvy, Lionel Dubois, Ward De Paepe, Diane Thomas, Guy De Weireld, Francesco Contino

研究成果: Article同行評審

8 引文 斯高帕斯(Scopus)

摘要

Direct Air Capture (DAC) technologies are gaining interest in the concept of carbon utilization and Power-to-Gas (PtG), as the economic valorization of the CO2 into methane provides a viable pathway to allow DAC systems to mature. However, research on DAC mainly focuses on isolated systems, and the system performance depends on parameters that are highly uncertain. To study the integration of DAC in PtG, we developed a DAC-PtG model, performed an Energy, Exergy, Economic and Environmental (4E) analysis and implemented uncertainty quantification to consider the uncertain environment. The results illustrate that the DAC-PtG system is autothermal when introducing a two-stage mechanical vapor recompression unit at the DAC outlet. The exergy efficiency ranges between 51.3% and 52.6% within 3 standard deviations, for which the uncertainty is driven by the ambient conditions and the uncertain heat of desorption. The methane issued from DAC-PtG has a lower carbon footprint than fossil methane when the carbon footprint of the electricity supply is below or equal to 0.12 kg˙CO˙2-eq /kWh. The Levelized Cost of Synthetic Natural Gas (LCSNG) ranges between 130 €/ MWh and 744 €/ MWh, following an uncertain electricity price and uncertain expenses related to DAC and electrolysis. Therefore, bulk manufacturing, further maturing of these technologies and more demonstration projects are required to reduce the uncertainty of the LCSNG. Future works will consider intermittent renewable energy sources to supply power.

原文English
文章編號127969
期刊Fuel
344
DOIs
出版狀態Published - 2023 7月 15

All Science Journal Classification (ASJC) codes

  • 一般化學工程
  • 燃料技術
  • 能源工程與電力技術
  • 有機化學

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