PVAm–PIP/PS Composite Membrane with High Performance for CO 2/ N 2 Separation
Высокоэффективная композиционная мембрана PVAm–PIP/PS для разделения CO₂/N₂
2012-02-21
SCID: 54.1/dnhbdwwc
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CO2/N2 separationPVAm–PIP/PS composite membranemembrane permselectivitypiperazine carrierspolysulfone ultrafiltration membrane
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Abstract (AI)
Polyvinylamine (PVAm) was modified using a cross‐linking agent containing carriers piperazine (PIP). Attenuated total reflectance fourier transform infrared, elemental analyzer, and X‐ray diffraction were used to characterize the PIP‐modified PVAm. The PVAm–PIP/polysulfone (PS) composite membrane was developed by coating PVAm–PIP mixed solutions with different mass ratios of PIP/PVAm (mPIP/mPVAm) on the PS ultrafiltration membrane. The effects of mPIP/mPVAm (from 0.715 to 2.860) in the coating solutions and wet coating thickness on the gas performance of the PVAm–PIP/PS composite membrane were investigated. The PVAm–PIP/PS composite membrane prepared showed higher performance than other membranes reported in the literature due to the large increase of the introducing carrier concentration and low crystallinity. Moreover, the separation performance stability of the PVAm–PIP/PS composite membrane was investigated and no deterioration in the membrane permselectivity was observed. Finally, the economic evaluation of the membrane with the highest performance prepared was carried out. © 2012 American Institute of Chemical Engineers AIChE J, 59: 215–228, 2013
Key Findings
1
An economic evaluation was conducted for the highest-performing membrane formulation.
2
Piperazine-containing cross-linking modification was used to prepare PVAm–PIP selective layers on polysulfone ultrafiltration membranes for CO2/N2 separation.
3
The PVAm–PIP/PS composite membrane achieved higher performance than previously reported membranes, attributed to increased carrier concentration and low crystallinity.
4
The membrane maintained stable separation performance, with no observed deterioration in permselectivity during stability testing.
5
The study systematically varied PIP/PVAm mass ratios from 0.715 to 2.860 and wet coating thickness to evaluate their effects on gas-separation performance.
Research Object
PVAm–PIP/polysulfone composite membrane for CO2/N2 separation
Research Subject
CO2/N2 separation performance and stability as functions of PIP/PVAm mass ratio and wet coating thickness, including membrane permselectivity and economic viability
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2012-02-21
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