Biogas upgrading with novel cellulose nano-crystals and polyvinyl amine nanocomposite membranes

Uzair Saeed, Zaib Jahan, Muhammad Bilal Khan Niazi, Erum Pervaiz, Farooq Sher

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Abstract

A novel crystalline nano cellulose (CNC) and polyvinyl amine (PVAm) based nanocomposite membranes were synthesized and evaluated for biogas upgrading. Different concentrations of CNC was incorporated in 3 wt % PVAm solution on commercial polysulfone (PSf) sheet using dip coating method. The effect of feed pressure (5, 10 and 15 bar) was investigated for the CO2/CH4 separation. The incorporation of CNC increased the crystallinity of membranes. The thickness of selective layer enhanced to 2.16 μm from 1.5 μm with increasing concentration of CNC. However, degree of swelling reduced from 75.88% to 68.93 with CNC concentration at 1.5 wt%. The best results were shown by PVAm membrane with 1 wt % CNC concentration i.e. CO2 permeance of 0.0216 m3(STP)/m2.bar.hr and selectivity (CO2/CH4) of 41.The permeance decreased approximately 1.8 folds for PVAm/1CNC membrane with the increase in pressure from 5 to 15 bar. However, selectivity dropped from 41 to 39 for formulated membranes.

Original languageEnglish
Article number106867
Number of pages9
JournalPolymer Testing
Volume91
Early online date19 Sep 2020
DOIs
Publication statusPublished - Nov 2020

Bibliographical note

© 2020 Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

Keywords

  • Biogas upgrading
  • Cellulose nano-crystals
  • Fixed site carrier membranes
  • Nanocomposite membranes
  • Polyvinyl amine

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics

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