Application of Biopolymers in Air Dehumidification Membranes

Kudasheva, Alina; Hirota, Yuichiro; Kawahara, Yutaka; Ito, Akira

doi:10.1252/jcej.15we049

Cited by 2 publications

(4 citation statements)

References 27 publications

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“…Water and air permeabilities of the aqueous salt solution liquid membranes supported by carbon nanoparticles. Water permeability data of the TEG liquid membrane was taken from the literature …”

Section: Resultssupporting

confidence: 79%

“…) were obtained by applying calculation model (Eqn ). These water permeabilities in Barrer unit are in the range 23 000–35 000 which is comparable with the permeabilities of polymeric membranes, such as 20 000 Barrer for ethylcellulose, 40 000 Barrer for polydimethylsiloxane (PDMS) membranes, and 26 000 Barrer for triethylene glycol (TEG) liquid membrane . It was observed that an increase of partial pressure of the water vapor, or in other words water vapor activity, did not show any significant changes in the water permeability.…”

Section: Resultsmentioning

confidence: 60%

“…). Details of the air dehumidification experimental setup can be viewed in a previous report . The dehumidification efficiency of the liquid membranes was evaluated in terms of the water permeability and condensed water recovery rate.…”

Section: Methodsmentioning

confidence: 99%

“…To overcome limitations of the traditional liquid desiccant system, such as packed beds, a new membrane‐based liquid desiccant air dehumidification system was first proposed by Zhang, in which LiCl solution was immobilized in cellulose acetate membrane sandwiched between two hydrophobic polyvinylidene fluoride (PVDF) support membranes, thus, forming a supported liquid membrane. More recently, LiCl salt was used in composite membranes with polymers, such as poly(vinyl alcohol) and chitosan, and CaCl 2 salt solution was used as liquid desiccant in a PVDF hollow fiber membrane contactor for air dehumidification . All these previous studies showed that addition of the salt, especially at high loadings, in the composite mixture improved water vapor permeation of the composite membranes.…”

Section: Introductionmentioning

confidence: 99%

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Aqueous salt solution liquid membranes, supported by nanoparticles, for water extraction from the atmosphere via air dehumidification

Kudasheva

Liu

Ito

2018

J of Chemical Tech & Biotech

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BACKGROUND Membrane technology is a promising solution for the development of a sustainable air dehumidifier because it is, in general, considered a cost‐effective technology and, moreover, water recovered from the air via membrane‐based dehumidification process can be recycled. RESULTS The efficiency of aqueous salt solution liquid membranes that were prepared by a nano‐sized additive supporting method and applied for the dehumidification of air, was evaluated in terms of the water permeability and condensed water recovery rate. It was found that not only the nature of the selective membrane material but also the type of membrane supporting material has an impact on the overall liquid membrane performance. Membranes supported by surface treated carbon black nanoparticles showed a water recovery rate of 12 g h−1 at 75–80%RH and average water permeability of 9 × 10−12 kmol m/(m2 s kPa). The most selective liquid membranes were LiBr and CaCl2, supported by surface treated carbon black, with water vapor/air separation factor of 34 300 and 21 700, respectively. CONCLUSIONS This work for the first time demonstrates the applicability of aqueous inorganic salt solutions in liquid membranes for dehumidification applications. Prepared liquid membranes showed moderate condensed water recovery rates and membrane stability over 1 month. © 2018 Society of Chemical Industry

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Section: Resultssupporting

confidence: 79%

Section: Resultsmentioning

confidence: 60%

Section: Methodsmentioning

confidence: 99%