4.3 Article

Oxygen separation through p84 copolyimide/nanocrystalline cellulose carbon membrane: Impact of heating rates

Journal

CHEMICAL ENGINEERING COMMUNICATIONS
Volume 208, Issue 4, Pages 442-452

Publisher

TAYLOR & FRANCIS INC
DOI: 10.1080/00986445.2019.1631163

Keywords

Heating rates; Oxygen and nanocrystalline cellulose (NCC); P84 copolyimide (PI); Tubular carbon membrane

Funding

  1. Ministry of Higher Education under Higher Institution Center of Excellence Scheme [R.J090301.7846.4J186]
  2. Universiti Teknologi Malaysia under Higher Institution Center of Excellence Scheme [R.J090301.7846.4J186]
  3. Ministry of Higher Education under the Fundamental Research Grant Scheme [RDU191105]
  4. Universiti Malaysia Pahang under the Fundamental Research Grant Scheme [RDU191105]

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Manipulation of heating rate during the fabrication of PI/NCC-based carbon membranes has a significant impact on gas permeation, with different heating rates leading to variations in membrane ideal selectivity and permeability. A heating rate of 3°C/min showed an improvement in membrane ideal selectivity but a reduction in permeability.
Separation of oxygen and nitrogen gas was studied by using tubular carbon membranes (TCMs) prepared from polymeric precursors. A coating procedure called dip-coating technique was employed to fabricate the TCMs using P84 copolyimide (PI) and nanocrystalline cellulose (NCC) as the main precursor and additive, respectively. Previous study has proved that properties of PI/NCC can be altered by changing the carbonization parameter, i.e. time, temperature, and environment. PI/NCC deposition on the ceramic tubular support was employed to produce diverse TCMs for gas separation via simple carbonization process. In this study, manipulation of heating rate was done to observe the effect of TCMs on gas permeation by setting the heating rate at 1, 3, 5, and 7??C?min(?1). It was proved that heating rate during PI/NCC-based carbon membrane fabrication played a significant role in gas ideal selectivity test. In addition, heating rate at (3??C?min(?1)) showed an improvement in the membrane ideal selectivity but a reduction in the permeability.

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