CO[sub 2]/CH[sub 4] separation by facilitated transport in amine-polyethylene glycol mixtures

Journal Article · Thu Jul 01 04:00:00 EDT 1993 · AIChE Journal (American Institute of Chemical Engineers); (United States)

DOI:https://doi.org/10.1002/aic.690390706· OSTI ID:5809847

Davis, R A; Sandall, O C ^[1]

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1. 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), Journal Name: AIChE Journal (American Institute of Chemical Engineers); (United States) Vol. 39:7; ISSN 0001-1541; ISSN AICEAC
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
090900* -- Biomass Fuels-- Processing-- (1990-)
ALCOHOLS
ALKANES
AMINES
BIOLOGICAL MATERIALS
BIOLOGICAL WASTES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
DECOMPOSITION
DISPERSIONS
FLUID FLOW
GLYCOLS
HYDROCARBONS
HYDROXY COMPOUNDS
KINETICS
MATERIALS
MATHEMATICAL MODELS
MEMBRANE TRANSPORT
MEMBRANES
METHANE
MIXTURES
MOLECULAR WEIGHT
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXIDES
OXYGEN COMPOUNDS
PERMEABILITY
POLYETHYLENE GLYCOLS
POLYMERS
REACTION KINETICS
SEPARATION PROCESSES
SUPPORTED LIQUID MEMBRANES
WASTES