Biogas can be a viable solution for replacing the conventional fuel for reducing pollution. However, the high CO 2 content in biogas must be removed for its utilization. In this study, biogas purification is carried out employing cellulose nanocrystals (CNC)/polyvinyl alcohol (PVA) “selective layered” polysulfone hollow fiber membrane. The membrane chamber is designed such that the cross‐flow of the biogas can be ensured for the effective interaction of the biogas with membrane surface. From various characterization tools like field emission scanning electron microscope, FTIR, X‐ray diffraction, moisture absorption and tensile test, CNC1/PVA (1 wt% of CNC in PVA) nanocomposite film demonstrated optimum crystallinity and mechanical strength while retaining higher moisture absorption. The average selective layer thickness at this CNC concentration is 1169 nm. CO 2 permeability of 17,858 barrer and the selectivity of 19 for CO 2 over CH 4 is observed, respectively.
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Mithra et al. (2024) studied this question.
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