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

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

doi:10.1016/j.polymertesting.2020.106867

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

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

School of Mechanical, Aerospace and Automotive Engineering

Research output: Contribution to journal › Article › peer-review

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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 language	English
Article number	106867
Number of pages	9
Journal	Polymer Testing
Volume	91
Early online date	19 Sep 2020
DOIs	https://doi.org/10.1016/j.polymertesting.2020.106867
Publication status	Published - Nov 2020

Bibliographical note

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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title = "Biogas upgrading with novel cellulose nano-crystals and polyvinyl amine nanocomposite membranes",

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.",

keywords = "Biogas upgrading, Cellulose nano-crystals, Fixed site carrier membranes, Nanocomposite membranes, Polyvinyl amine",

author = "Uzair Saeed and Zaib Jahan and Niazi, {Muhammad Bilal Khan} and Erum Pervaiz and Farooq Sher",

note = "{\textcopyright} 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/).",

year = "2020",

month = nov,

doi = "10.1016/j.polymertesting.2020.106867",

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AU - Saeed, Uzair

AU - Jahan, Zaib

AU - Niazi, Muhammad Bilal Khan

AU - Pervaiz, Erum

AU - Sher, Farooq

PY - 2020/11

Y1 - 2020/11

N2 - 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.

AB - 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.

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