July 2011

Plant Design

Use glycerol to dehydrate supercritical carbon dioxide

This technology increases hydrocarbon recovery

Beitler, C., Fisher, K., Lundeen, J., Trimeric Corp.; Swadener, M., Denbury Resources Inc.

Twenty years after the first two glycerol dehydration units were built for supercritical carbon dioxide (CO2) use, Denbury Resources found a need to build new units to process the increasing amount of CO2 production from the Jackson Dome area in Mississippi. Denbury has now completed and started up five new glycerol-based dehydration facilities in the past five years, with other units under construction. Glycerol is used to dehydrate CO2 when high-pressures and non-idealities cause excessive vapor-phase glycol (i.e., ethylene, diethylene or trietheylene glycol) losses, making normal glycol-based dehydration uneconomical in comparison with glycerol-based dehydration. Denbury uses the superc

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