On a recent project, Sargent & Lundy developed a novel system to dehydrate CO2 by utilizing heat recovered from the gas compression system and absorption chillers for applications such as Carbon Capture and Sequestration (CCS) projects on fossil fuel-fired power plants. The dehydration system is based upon recovering waste heat from the compression cycle and transferring it to absorption chillers to generate chilled water for dehydration purposes. The chilled water is used within multiple stages of the CO2 compression train. The system is capable of dehydrating the supercritical CO2 stream to a level of 29 lbm of H2O per mmSCF for transport in a carbon steel pipeline for enhanced oil recovery and sequestration purposes. The process requires the recovery of waste heat, absorption chillers and cooling water from a conventional cooling tower. The system provides a unique option to reduce compression train power requirements and emissions.

Volume Subject Area:
Advanced Energy Systems and Renewables (Wind, Solar, Geothermal)
Topics:
Absorption, Carbon dioxide, Compression, Heat recovery, Water, Carbon capture and storage, Trains, Waste heat, Carbon steel, Cooling, Cooling towers, Cycles, Emissions, Fuels, Heat, Pipelines, Power stations, Supercritical carbon dioxide, Tertiary petroleum recovery
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Copyright © 2012 by ASME
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