Distillation technology increases propane recovery in carbon-dioxide floods
Carbon-dioxide-rich separator gas streams from CO/sub 2/ floods can be processed by the Ryan/Holmes propane-recovery method to obtain propane recoveries of 85-95%. The Ryan/Holmes processes are a family of distillations which use recycle additive to make possible or aid separation of certain components. Recycle additive, derived from NGL present in the feed, is a C/sub 4/ + stream. It is introduced to the Ryan/Holmes columns at or near the top of the fractionators. Previously presented was the separation of methane and CO/sub 2/, in which additive operates to prevent freezing and to raise the temperatures required for the separation. Indeed, even at propane-refrigeration temperatures, a perfect separation between methane and CO/sub 2/ can be accomplished. The second separation is carbon dioxide and ethane. These two compounds form an azeotrope; additive breaks the azeotrope and permits ethane recovery. The third separation is CO/sub 2/ and H/sub 2/S. In the absence of additive, their separability is weak; separation is greatly enhanced by the presence of additive.
- Research Organization:
- Koch Process Systems Inc., Westborough, MA
- OSTI ID:
- 5194838
- Journal Information:
- Oil Gas J.; (United States), Vol. 84:40
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
02 PETROLEUM
CARBON DIOXIDE
DISTILLATION
OIL WELLS
CARBON DIOXIDE INJECTION
PROPANE
ADDITIVES
ANTIFREEZE
AZEOTROPE
DESULFURIZATION
DISTILLATION EQUIPMENT
ENHANCED RECOVERY
ETHANE
FREEZE PROTECTION
HYDROGEN SULFIDES
METHANE
NATURAL GAS LIQUIDS
PETROLEUM
RECYCLING
REFRIGERATION
TEMPERATURE CONTROL
WELL STIMULATION
ALKANES
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
CONTROL
COOLING
ENERGY SOURCES
EQUIPMENT
FLUID INJECTION
FLUIDS
FOSSIL FUELS
FUELS
HYDROCARBONS
HYDROGEN COMPOUNDS
LIQUIDS
MISCIBLE-PHASE DISPLACEMENT
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
RECOVERY
SEPARATION PROCESSES
STIMULATION
SULFIDES
SULFUR COMPOUNDS
WELLS
030300* - Natural Gas- Drilling
Production
& Processing
020300 - Petroleum- Drilling & Production