Compression and Dehydration of Carbon Dioxide for Oil Field Injection

摘要

If a coal-fired boiler is fed oxygen (diluted with recycled flue gas to control temperature) instead of air for combustion, the resulting flue gas will be predominantly carbon dioxide: it will not be necessary to remove nitrogen before using the carbon dioxide for enhanced oil recovery. The flue gas must be compressed to pipeline pressure, however, for delivery to an oil field, and at this supercritical pressure the presence of too much water vapor would cause unacceptable corrosion due to the formation of carbonic acid and sulfurous acid. This report presents preliminary designs and cost estimates for equipment needed to compress and dehydrate flue gas from three sizes of coal-oxygen fired boilers (500, 100, and 50 MWe), as an aid to engineers and decision makers considering the sale of flue-gas carbon dioxide. (ERA citation 10:033249)