Abstract
The impurities present in CO2 streams are extremely important for CO2 pipeline and ship transportation affecting, various aspects such as, the range of operation, safety considerations, fracture control, cracking, corrosion control, dispersion in the event of a release, fluid density, operating pressure, temperature and the quantity of CO2 that can be transported. The range and levels of potential impurities emitted from CO2 Capture facilities will differ between different power plant and industrial sources and also between the capture technologies installed at the source. However, the potential CO2 specifications that could enter the transport and storage systems, particularly from industrial sources, remain relatively under-researched. Therefore, it is of critical importance to improve the understanding of the effect of these potential impurities, which have not been widely studied, on CO2 compression, liquefaction and transportation in relevant conditions. IEAGHG has identified the need to study the effects of impurities in CO2 streams on CO2 compression, pipeline and shipping transportation. This study has been performed by a consortium led by Newcastle University and including the University of Edinburgh to address this need. The report: - Reviews the CO2 impurities that could be present from different CO2 capture technologies and develops twelve CO2 impurity scenario compositions for further analysis . - Evaluates these impurity scenarios for CO¬2 physical and transport properties. The properties that are investigated are the dew point, bubble point, melting point, density, Joule-Thomson coefficients, speed of sound, viscosity and thermal conductivity. Comprehensive tables and figures are provided for all of the scenarios investigated and for binary combinations of CO2 with impurity . - Evaluates the effects of the impurities on CO2 compression and liquefaction in terms of performance and energy requirements. - Identifies the effects of the impurities on the operating conditions for both pipeline and ship based transportation. - Evaluates the effect of the impurities on the selection of materials for pipeline and ship transportation.
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