2015/07/02 by Thomas A. Demetriades, R. Graham, Demetriades, Thomas A. +1 · 1 citation
Engineering · Environmental Science · #Atmospheric and Environmental Gas Dynamics #CO2 Sequestration and Geologic Interactions #Carbon Dioxide Capture Technologies #Chemical Physics (physics.chem-ph) #FOS: Physical sciences
paper · pdf · doi:10.48550/arxiv.1507.01545
openalex publication_date 2015/07/02 · openalex created_date 2022/08/09 · openalex updated_date 2026/07/28
One of the aspects currently holding back commercial scale deployment of\ncarbon capture and storage (CCS) is an accurate understanding of the\nthermodynamic behaviour of carbon dioxide and relevant impurities during the\npipeline transport stage. In this article we develop a general framework for\nderiving pressure-explicit EoS for impure CO2. This flexible framework\nfacilitates ongoing development of custom EoS in response to new data and\ncomputational applications. We use our method to generalise a recent EoS for\npure CO2 [Demetriades et al. Proc IMechE Part E, 227 (2013) pp. 117] to binary\nmixtures with N2, O2 and H2, obtaining model parameters by fitting to\nexperiments made under conditions relevant to CCS-pipeline transport. Our model\npertains to pressures up to 16MPa and temperatures between 273K and the\ncritical temperature of pure CO2. In this region, we achieve close agreement\nwith experimental data. When compared to the GERG EoS, our EoS has a comparable\nlevel of agreement with CO2 -N2 VLE experiments and demonstrably superior\nagreement with the O2 and H2 VLE data. Finally, we discuss future options to\nimprove the calibration of EoS and to deal with the sparsity of data for some\nimpurities.\n