• Energy Research

Carbon capture and storage (CCS) is vital to climate change mitigation, and has application across the economy, in addition to facilitating atmospheric carbon dioxide removal resulting in emissions offsets and net negative emissions. This contribution reviews the state-of-the-art and identifies key challenges which must be overcome in order to pave the way for its large-scale deployment.

Carbon capture and storage (CCS) is vital to climate change mitigation, and has application across the economy, in addition to facilitating atmospheric carbon dioxide removal resulting in emissions offsets and net negative emissions. This contribution reviews the state-of-the-art and identifies key challenges which must be overcome in order to pave the way for its large-scale deployment.

AbstractIn the present study we investigate the size and volume distribution of n-decane clusters in a brine saturated porous glass sample by means of micro-CT imaging with pore-scale resolution. Cluster size distribution functions and cluster volumes were obtained by image analysis for a range of injected pore volumes under both imbibition and drainage conditions, and with a field of view larger than the porosity-based representative elementary volume (REV). n-decane clusters were found to be distributed in sizes greater than that of the REV, with the largest one containing between 65 and 99% of the entire non-wetting phase. The results indicate that the two-phase REV may be substantially larger than for single-phase flow and larger than the attainable field of view.

AbstractIn the present study we investigate the size and volume distribution of n-decane clusters in a brine saturated porous glass sample by means of micro-CT imaging with pore-scale resolution. Cluster size distribution functions and cluster volumes were obtained by image analysis for a range of injected pore volumes under both imbibition and drainage conditions, and with a field of view larger than the porosity-based representative elementary volume (REV). n-decane clusters were found to be distributed in sizes greater than that of the REV, with the largest one containing between 65 and 99% of the entire non-wetting phase. The results indicate that the two-phase REV may be substantially larger than for single-phase flow and larger than the attainable field of view.

Abstract Despite the importance of the accurate measurement of vapour–liquid equilibria (VLE) data, the reported values, even for well-studied systems such as MEA–H2O–CO2, are scattered. This work centres on the development of an experimental method to measure accurately the VLE of various aqueous amine systems. A static-analytic type of VLE apparatus has been constructed and employed to measure the VLE of CO2 in aqueous monoethanolamine and 2-amino-2-methyl-1-propanol. Gas chromatography was used to analyse the liquid phase compositions. The setup has been validated against literature data for 30 mass% MEA (monoethanolamine) at T = 313 and 393 K and was shown to be capable of generating reliable and repeatable data. New measurements for 30 mass% aqueous AMP (2-amino-2-methyl-1-propanol) solutions are also presented at temperatures between 313 and 393 K and a total pressure range of 23–983 kPa. A quasi-chemical model has been employed to interpret the experimental data for the MEA–H2O–CO2 and AMP–H2O–CO2 systems. The average absolute deviation (ΔAAD) between model prediction and experimental data is within 7%.