Preparation and performance assessment of binary and ternary PES-SAPO 34-HMA based gas separation membranes


Karatay E., KALIPÇILAR H., YILMAZ L.

JOURNAL OF MEMBRANE SCIENCE, vol.364, pp.75-81, 2010 (Peer-Reviewed Journal) identifier identifier

  • Publication Type: Article / Article
  • Volume: 364
  • Publication Date: 2010
  • Doi Number: 10.1016/j.memsci.2010.08.004
  • Journal Name: JOURNAL OF MEMBRANE SCIENCE
  • Journal Indexes: Science Citation Index Expanded, Scopus
  • Page Numbers: pp.75-81
  • Keywords: Gas separation, Mixed matrix membrane, Polyethersulfone, SAPO-34, 2-Hydroxy 5-methyl aniline, MIXED MATRIX MEMBRANES, POLYMER-CHAIN RIGIDIFICATION, RESIDUAL SOLVENT, TRANSPORT-PROPERTIES, COMPOSITE MEMBRANES, PORE BLOCKAGE, POLYIMIDE, ANTIPLASTICIZATION, PERMEABILITY, POLYSULFONE

Abstract

The effect of low molecular weight additive (LMWA) loading on the gas permeation properties of pure PES and PES/SAPO-34 membranes was investigated. 2-hydroxy 5-methyl aniline (HMA) was selected as LMWA. Membranes were prepared by solvent-evaporation method and annealed above the glass transition temperature (T-g) of PES. They were characterized by single gas permeability measurements of H-2, CO2, and CH4 as well as scanning electron microscopy (SEM), and differential scanning calorimetry (DSC). The H-2/CH4 selectivities of pure PES and SAPO-34/PES membranes were 71.31 and 61.02, respectively. The incorporation of zeolite SAPO-34 to neat PES membranes resulted in higher permeabilities for all gases with slight decrease in CO2/CH4 and H-2/CH4 ideal selectivities compared to pure PES membranes. However, PES/SAPO-34/HMA membranes had significantly higher ideal selectivities than pure PES, PES/SAPO-34, and PES/HMA membranes, for example the H-2/CH4 selectivity of HMA/SAPO-34/PES membrane was 175.8, which was three times as high as the H-2/CH4 selectivity of PES/SAPO-34 membrane. The permeabilities of all the gases through PES/SAPO-34/HMA membranes were also higher than those through PES/HMA membranes. Ternary component membranes revealed better gas permeation performance compared to pure polymeric and binary component membranes. (C) 2010 Elsevier B.V. All rights reserved.