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Title: Use of an internally staged permeator in the enrichment of methane from biogas
Authors: Li, K. 
Teo, W.K. 
Keywords: gas separations
membrane permeator
methane enrichment
Issue Date: 1-Jan-1993
Citation: Li, K., Teo, W.K. (1993-01-01). Use of an internally staged permeator in the enrichment of methane from biogas. Journal of Membrane Science 78 (1-2) : 181-190. ScholarBank@NUS Repository.
Abstract: An internally staged membrane permeator of a bench scale type has been employed in a study of methane enrichment from biogas. The permeator contains two membranes of the same type; therefore, the overall driving force between feed and permeate side in the permeator is divided into two parts through these two membranes. Theoretical studies were conducted using mathematical models based on perfect mixing and cocurrent flow patterns. The effects of operating variables such as feed pressure, overall stage cut and flow patterns in the permeator on the extent of separation and membrane area requirement have been examined. The observed experimental results from bench scale studies agree well with theoretical predictions based on perfect mixing model. Simulation results show that the optimal performance of the permeator can be obtained by properly selecting the stage cut parameter, E(∅) and stage pressure parameter, E(r), which are functions of individual stage cut and intermediate pressure respectively. A comparative study between the internally staged permeator and a conventional single-stage permeator indicates that, under the same energy consumption, the former offers higher product recovery, but requires much larger membrane area.
Source Title: Journal of Membrane Science
ISSN: 03767388
DOI: 10.1016/0376-7388(93)85259-Y
Appears in Collections:Staff Publications

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