New hydrophilic carbon molecular sieve membranes for bioethanol dehydration via pervaporation

Rahimalimamaghani, Arash; Tanaka, David A. Pacheco; Tanco, Margot A. Llosa; d’Angelo, M.F. Neira; Gallucci, Fausto

doi:10.1016/j.cej.2022.134891

Cited by 25 publications

(8 citation statements)

References 52 publications

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“…Bioethanol is formerly dehydrated by the distillation route. However, excessive overheads, low efficiency, and higher energy consumption render the distillation process incompatible for the concentration of bioethanol [ 4 ]. Consequently, feasible, competent, and commercial bioethanol production has gained importance.…”

Section: Introductionmentioning

confidence: 99%

Novel Polyelectrolyte Complex Membranes Containing Carboxymethyl Cellulose–Gelatin for Pervaporation Dehydration of Azeotropic Bioethanol for Biofuel

Kalahal

Sajjan²,

Rajhi³

et al. 2022

Polymers

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Polyelectrolyte complex membranes (PECMs) were prepared by combining sodium carboxymethyl cellulose (NaCMC) and gelatin (Ge) with variations in the Ge content in the NaCMC matrix. Characterization methods, such as infrared spectroscopy (FTIR), wide-angle X-ray diffraction (WAXD), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), contact angle analysis (CA), and universal testing machines (UTM) were used to investigate the physicochemical studies of the prepared membranes. The pervaporation characteristics of membranes with Ge content were investigated using an azeotropic mixture of water and bioethanol. The obtained data revealed that the membrane with 15 mass% of Ge (M-3) showed a maximum flux of 7.8403 × 10−2 kg/m2·h with separation selectivity of 2917 at 30 °C. In particular, the total and water flux of PECMs are shown as very close to each other indicating that the fabricated membranes could be employed to successfully break the azeotropic point of water–bioethanol mixtures. Using temperature-dependent permeation and diffusion data, the Arrhenius activation parameters were calculated, and the obtained values of water permeation (Epw) were considerably smaller than bioethanol permeation (EpE). Developed membranes showed the positive heat of sorption (ΔHs), suggesting that Henry’s sorption mode is predominant.

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Section: Introductionmentioning

confidence: 99%

Novel Polyelectrolyte Complex Membranes Containing Carboxymethyl Cellulose–Gelatin for Pervaporation Dehydration of Azeotropic Bioethanol for Biofuel

Kalahal

Sajjan²,

Rajhi³

et al. 2022

Polymers

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show abstract

“…With an increase in PDMS concentration from 0.5 to 3 wt%, the R a of PDMS@ZIF‐8/PVDF HFCMs decreased from 92.4 ± 9 nm to 35.7 ± 5 nm (Figure 4B–F). Membranes with higher surface roughness could lead to a larger effective contact area with the feed, thereby enhancing the mass transfer capacity in PV separation 38 …”

Section: Resultsmentioning

confidence: 99%

“…Membranes with higher surface roughness could lead to a larger effective contact area with the feed, thereby enhancing the mass transfer capacity in PV separation. 38 The thickness of the separation layer in the membrane plays a crucial role in determining its separation performance. Figure 5A PVDF membrane, the weak and broad peaks associated with the PDMS matrix were not detected due to the small amount of PDMS and the overlapping of strong PVDF diffraction peaks.…”

Section: Morphology Of the Pdms@zif-8/pvdf Hfcmsmentioning

confidence: 99%

Fabrication of highly permeable PDMS@ZIF‐8/PVDF hollow fiber composite membrane in module for ethanol‐water separation

et al. 2023

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The construction of high‐performance MOF‐based hollow fiber composite membrane (HFCM) modules is a significant, yet challenging task for the biofuel production industry. In this study, a novel approach was taken to fabricate PDMS@ZIF‐8/PVDF HFCMs in modules through a facile ZIF‐8 self‐crystallization synthesis followed by pressure‐assisted PDMS infusion for pervaporation ethanol‐water separation. The as‐prepared HFCMs exhibited an ultrathin separation layer (thickness, 370 ± 35 nm), which was achieved through precise regulation of the ZIF‐8 membrane and defect repair by PDMS infusion. Moreover, the strategy utilized in this study resolved the defect issues arising from MOF agglomeration in conventional composite membranes. Impressively, at the optimal packing density, the prepared membrane demonstrated a remarkable ethanol flux (1.11 kg m−2 h−1) with an PSI value (26.59 kg m−2 h−1) and showed promising long‐term stability for the pervaporation of 5 wt% ethanol aqueous solution at 40°C.

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“…[3][4][5][6] Carbon molecular sieve (CMS) membranes are composed of microporous carbon with slit-like nanopores produced by carbonization of organic precursors such as polyamide, phenolic resin, and poly(furfuryl alcohol) (PFA). [7][8][9] They have shown great potential for hydrogen purication due to their precise gas sieving, high stability in harsh environments, and low cost. [10][11][12][13][14] CMS membranes can be categorized into non-supported and supported membranes.…”

Section: Introductionmentioning

confidence: 99%

Metal oxyhydroxide nanosheet-assisted fabrication of ultrathin carbon molecular sieve membrane for hydrogen separation

Low

et al. 2022

J. Mater. Chem. A

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New hydrophilic carbon molecular sieve membranes for bioethanol dehydration via pervaporation

Cited by 25 publications

References 52 publications

Novel Polyelectrolyte Complex Membranes Containing Carboxymethyl Cellulose–Gelatin for Pervaporation Dehydration of Azeotropic Bioethanol for Biofuel

Novel Polyelectrolyte Complex Membranes Containing Carboxymethyl Cellulose–Gelatin for Pervaporation Dehydration of Azeotropic Bioethanol for Biofuel

Fabrication of highly permeable PDMS@ZIF‐8/PVDF hollow fiber composite membrane in module for ethanol‐water separation

Metal oxyhydroxide nanosheet-assisted fabrication of ultrathin carbon molecular sieve membrane for hydrogen separation

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