Effect Of Membrane Selectivity And Configuration On Purity And Recovery Of Hydrogen From Syngas
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Date
2021-01-01
Authors
Thamudoran, Mohashiniee
Journal Title
Journal ISSN
Volume Title
Publisher
Universiti Sains Malaysia
Abstract
In this thesis, simulation of a membrane gas separation system for purification of
hydrogen from syngas has been discussed. The simulation was done to study the effects of
membrane selectivity, flow configuration, stage cut and feed pressure on the purity and
recovery of hydrogen from syngas. In order to model the membrane, a complete mixing model
was applied to study these effects. The mathematical modelling involved in the simulation was
done in Mathcad and the results were analysed using the analysis of variance (ANOVA) under
the Response Surface Methodology (RSM) method. In order to produce high purity hydrogen
that is accepted as commercial industrial grade hydrogen, we studied two types of flow
configuration models. Configuration 1 involves a carbon dioxide permeable membrane while
configuration 2 model involves a hydrogen permeable membrane. As a result, it is noticed that
in the first configuration, at the stage cut of 0.2, feed pressure of 5 bar and CO2/H2 selectivity
of 1500, the highest purity of hydrogen at 52.24% and recovery of 59.58% at the permeate
stream is achieved. Meanwhile in the retentate stream, the purity and recovery of carbon
dioxide achieved is 52.21% and 55.53% respectively. The second configuration is when a
hydrogen permeable membrane is applied. This configuration results in the highest possible
purity of hydrogen of 100% with recovery of 32.52% and carbon dioxide purity and recovery
at 27.35% and 90.42% respectively, at stage cut of 0.2, feed pressure of 25 bar and H2/CO2
selectivity of 500.