Aroma recovery by integration of sweeping gas pervaporation and liquid absorption in membrane contactors

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Abstract

An integrated process for recovering of aroma compounds from dilute natural matrices is proposed, combining the advantages of organophilic and sweeping gas pervaporation with gas-liquid absorption in membrane contactors. This process avoids the use of vacuum conditions and condensation steps for aroma recovery. Additionally, it presents the advantage of stabilising the target aroma compounds after being captured in a liquid absorbent, which is used as an additive in food and/or cosmetic products. After solubilisation in the selected absorbent the aromas may be delivered and released in the final product. In order to optimise this integrated process the conditions for sweeping gas pervaporation, namely the sweep gas linear velocity in the downstream circuit of the pervaporation module, were firstly optimised. Several potential food/cosmetic compatible additives were tested and their affinity towards the target aroma compounds was evaluated. High partitions of the aroma compounds to polyethylene glycol (PEG) 300 were observed, especially for hydrophobic esters, making possible to achieve an additional degree of selectivity. Finally, the absorption of aromas in a non-dispersive membrane contactor system was achieved under extremely stable operating conditions. (C) 2009 Elsevier B.V. All rights reserved.
Original languageUnknown
Pages (from-to)103-111
JournalSeparation and Purification Technology
Volume70
Issue number1
Publication statusPublished - 1 Jan 2009

Keywords

    Cite this

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    title = "Aroma recovery by integration of sweeping gas pervaporation and liquid absorption in membrane contactors",
    abstract = "An integrated process for recovering of aroma compounds from dilute natural matrices is proposed, combining the advantages of organophilic and sweeping gas pervaporation with gas-liquid absorption in membrane contactors. This process avoids the use of vacuum conditions and condensation steps for aroma recovery. Additionally, it presents the advantage of stabilising the target aroma compounds after being captured in a liquid absorbent, which is used as an additive in food and/or cosmetic products. After solubilisation in the selected absorbent the aromas may be delivered and released in the final product. In order to optimise this integrated process the conditions for sweeping gas pervaporation, namely the sweep gas linear velocity in the downstream circuit of the pervaporation module, were firstly optimised. Several potential food/cosmetic compatible additives were tested and their affinity towards the target aroma compounds was evaluated. High partitions of the aroma compounds to polyethylene glycol (PEG) 300 were observed, especially for hydrophobic esters, making possible to achieve an additional degree of selectivity. Finally, the absorption of aromas in a non-dispersive membrane contactor system was achieved under extremely stable operating conditions. (C) 2009 Elsevier B.V. All rights reserved.",
    keywords = "absorption, production, organic-compounds, contactors, Bioethanol, volatile, recovery, pressure, extraction, sorption, Organophilic, Sweeping, performance, separation, distillation, ester, gas, Gas, removal, Membrane, binary-mixtures, Aroma/flavour, pervaporation",
    author = "Crespo, {Jo{\~a}o Paulo Serejo Goul{\~a}o}",
    year = "2009",
    month = "1",
    day = "1",
    language = "Unknown",
    volume = "70",
    pages = "103--111",
    journal = "Separation and Purification Technology",
    issn = "1383-5866",
    publisher = "Elsevier Science B.V., Inc",
    number = "1",

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    TY - JOUR

    T1 - Aroma recovery by integration of sweeping gas pervaporation and liquid absorption in membrane contactors

    AU - Crespo, João Paulo Serejo Goulão

    PY - 2009/1/1

    Y1 - 2009/1/1

    N2 - An integrated process for recovering of aroma compounds from dilute natural matrices is proposed, combining the advantages of organophilic and sweeping gas pervaporation with gas-liquid absorption in membrane contactors. This process avoids the use of vacuum conditions and condensation steps for aroma recovery. Additionally, it presents the advantage of stabilising the target aroma compounds after being captured in a liquid absorbent, which is used as an additive in food and/or cosmetic products. After solubilisation in the selected absorbent the aromas may be delivered and released in the final product. In order to optimise this integrated process the conditions for sweeping gas pervaporation, namely the sweep gas linear velocity in the downstream circuit of the pervaporation module, were firstly optimised. Several potential food/cosmetic compatible additives were tested and their affinity towards the target aroma compounds was evaluated. High partitions of the aroma compounds to polyethylene glycol (PEG) 300 were observed, especially for hydrophobic esters, making possible to achieve an additional degree of selectivity. Finally, the absorption of aromas in a non-dispersive membrane contactor system was achieved under extremely stable operating conditions. (C) 2009 Elsevier B.V. All rights reserved.

    AB - An integrated process for recovering of aroma compounds from dilute natural matrices is proposed, combining the advantages of organophilic and sweeping gas pervaporation with gas-liquid absorption in membrane contactors. This process avoids the use of vacuum conditions and condensation steps for aroma recovery. Additionally, it presents the advantage of stabilising the target aroma compounds after being captured in a liquid absorbent, which is used as an additive in food and/or cosmetic products. After solubilisation in the selected absorbent the aromas may be delivered and released in the final product. In order to optimise this integrated process the conditions for sweeping gas pervaporation, namely the sweep gas linear velocity in the downstream circuit of the pervaporation module, were firstly optimised. Several potential food/cosmetic compatible additives were tested and their affinity towards the target aroma compounds was evaluated. High partitions of the aroma compounds to polyethylene glycol (PEG) 300 were observed, especially for hydrophobic esters, making possible to achieve an additional degree of selectivity. Finally, the absorption of aromas in a non-dispersive membrane contactor system was achieved under extremely stable operating conditions. (C) 2009 Elsevier B.V. All rights reserved.

    KW - absorption

    KW - production

    KW - organic-compounds

    KW - contactors

    KW - Bioethanol

    KW - volatile

    KW - recovery

    KW - pressure

    KW - extraction

    KW - sorption

    KW - Organophilic

    KW - Sweeping

    KW - performance

    KW - separation

    KW - distillation

    KW - ester

    KW - gas

    KW - Gas

    KW - removal

    KW - Membrane

    KW - binary-mixtures

    KW - Aroma/flavour

    KW - pervaporation

    M3 - Article

    VL - 70

    SP - 103

    EP - 111

    JO - Separation and Purification Technology

    JF - Separation and Purification Technology

    SN - 1383-5866

    IS - 1

    ER -