Separation of CO2 from hydrogen using membrane gas absorption with PVDF/PBI membrane

N. A. Ahmad, C. P. Leo, A. L. Ahmad, Abdul Wahab Mohammad

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Biohydrogen contains carbon dioxide that requires efficient separation at low pressure and temperature. In this work, the feasibility of membrane gas absorption (MGA) in the separation of CO2 from hydrogen was investigated. The blending of amorphorus polybenzimidazole (PBI) and semicrystalline polyvinylidene fluoride (PVDF) resulted in a nearly superhydrophobic and microporous membrane, showing its great potential to be applied in membrane gas absorption (MGA) for CO2 capture from biohydrogen. The presence of hydrogen bonding in the polymer blend due to donor (-NH-) and proton acceptor (-N=) of PBI encouraged the formation of miscibility blend. The hydrophobicity of PVDF membrane was only slightly affected even the loading of PBI was increased to 20 wt%. The incorporation of PBI into PVDF membrane also enhanced the melting temperature (Tm) to increase from 166°C to 171°C. The membrane pore size was greatly improved after blending. In a MGA system with water absorbent, the PVDF/PBI membrane with 20 wt% of PBI showed the highest CO2 flux of 4.16 × 10-4 mol/m2s. More importantly, 67 % of the CO2 in a gas mixture of H2 and CO2 could be removed using diethanolamine only.

Original languageEnglish
Pages (from-to)4855-4861
Number of pages7
JournalInternational Journal of Hydrogen Energy
Volume41
Issue number8
DOIs
Publication statusPublished - 2 Mar 2016

Fingerprint

polybenzimidazole
Gas absorption
vinylidene
fluorides
membranes
Membranes
Hydrogen
hydrogen
gases
polymer blends
absorbents
Polymer blends
Hydrophobicity
hydrophobicity
Gas mixtures
Pore size
gas mixtures
Melting point
carbon dioxide
Carbon dioxide

Keywords

  • CO separation
  • Hydrogen
  • Membrane gas absorption
  • PBI
  • PVDF

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

Cite this

Separation of CO2 from hydrogen using membrane gas absorption with PVDF/PBI membrane. / Ahmad, N. A.; Leo, C. P.; Ahmad, A. L.; Mohammad, Abdul Wahab.

In: International Journal of Hydrogen Energy, Vol. 41, No. 8, 02.03.2016, p. 4855-4861.

Research output: Contribution to journalArticle

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