CO[sub 2]/CH[sub 4] separation by facilitated transport in amine-polyethylene glycol mixtures
- Univ. of California, Santa Barbara, CA (United States). Dept. of Chemical and Nuclear Engineering
Large quantities of methane are generated by the decomposition of biological and industrical wastes. A key to the recovery of a gas with a high heating value is an efficient means of separating the methane from its primary diluent, carbon dioxide. In this work, the separation of carbon dioxide from methane by reactive liquid membranes consisting of the secondary amines, diethanolamine, and diisopropanolamine in polyethylene glycol with an average molecular weight of 400 was studied. A mathematical model was developed to describe the transport process. This model employs the zwitterion mechanism for the CO[sub 2] amine reaction kinetics. Membrane flux experiments utilizing a flat plate device were carried out to verify the model predictions. It was found that large permeabilities and separations were achieved for low CO[sub 2] feed concentrations. The results also show that DEA based solutions give better separation than DIPA based solutions.
- OSTI ID:
- 5809847
- Journal Information:
- AIChE Journal (American Institute of Chemical Engineers); (United States), Vol. 39:7; ISSN 0001-1541
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BIOLOGICAL WASTES
DECOMPOSITION
CARBON DIOXIDE
MEMBRANE TRANSPORT
METHANE
AMINES
CHEMICAL REACTION KINETICS
FLUID FLOW
MATHEMATICAL MODELS
MIXTURES
MOLECULAR WEIGHT
PERMEABILITY
POLYETHYLENE GLYCOLS
SEPARATION PROCESSES
SUPPORTED LIQUID MEMBRANES
ALCOHOLS
ALKANES
BIOLOGICAL MATERIALS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
DISPERSIONS
GLYCOLS
HYDROCARBONS
HYDROXY COMPOUNDS
KINETICS
MATERIALS
MEMBRANES
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXIDES
OXYGEN COMPOUNDS
POLYMERS
REACTION KINETICS
WASTES
090900* - Biomass Fuels- Processing- (1990-)