Total permeate pressure influence on the selectivity of the pervaporation of aroma compounds

Baudot, Arnaud; Souchon, Isabelle; Marin, Michèle

doi:10.1016/s0376-7388(99)00018-6

Cited by 57 publications

(32 citation statements)

References 26 publications

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“…At the beginning of D4, this CO 2 sensor was deployed in the field the first time and thus experienced its first cycles of rapid temperature and hydrostatic pressure changes. The observed decreasing trends during D4 in both k d and k s seem to be indicative of a membrane conditioning phase, which has been observed for membrane-based instrumentation during former studies (Marin et al 1992;Baudot et al 1999;McNeil et al 2006). The elevated scattering of k d (rmse: 21.7 s) compared to k s (rmse: 2.6 s) during D4 is due to a variable float depth during ZPs.…”

supporting

confidence: 62%

In Situ CO2 and O2 Measurements on a Profiling Float

Fiedler

Fietzek

Vieira

et al. 2013

Journal of Atmospheric and Oceanic Technology

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In recent years, profiling floats, which form the basis of the successful international Argo observatory, are also being considered as platforms for marine biogeochemical research. This study showcases the utility of floats as a novel tool for combined gas measurements of CO 2 partial pressure ( pCO 2 ) and O 2 . These float prototypes were equipped with a small-sized and submersible pCO 2 sensor and an optode O 2 sensor for highresolution measurements in the surface ocean layer. Four consecutive deployments were carried out during November 2010 and June 2011 near the Cape Verde Ocean Observatory (CVOO) in the eastern tropical North Atlantic. The profiling float performed upcasts every 31 h while measuring pCO 2 , O 2 , salinity, temperature, and hydrostatic pressure in the upper 200 m of the water column. To maintain accuracy, regular pCO 2 sensor zeroings at depth and surface, as well as optode measurements in air, were performed for each profile. Through the application of data processing procedures (e.g., time-lag correction), accuracies of floatborne pCO 2 measurements were greatly improved (10-15 matm for the water column and 5 matm for surface measurements). O 2 measurements yielded an accuracy of 2 mmol kg 21. First results of this pilot study show the possibility of using profiling floats as a platform for detailed and unattended observations of the marine carbon and oxygen cycle dynamics.

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supporting

confidence: 62%

In Situ CO2 and O2 Measurements on a Profiling Float

Fiedler

Fietzek

Vieira

et al. 2013

Journal of Atmospheric and Oceanic Technology

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“…These compounds are characteristic of seafood 111 flavour: 1-octen-3-ol has been reported to be one of the volatile components widely 112 distributed in fresh and saltwater fish, 1-penten-3-ol contributes to a butter-like odor 113 (although its aroma treshold value is rather high), 3-methylbutanal is one of the most 114 abundant volatile compound in boiled and pasteurized crabmeat, hexanal is one of the most 115 abundant volatiles generated during lipid oxidation at moderate temperatures, benzaldehyde 116 contributes to characteristic cooked crab flavour and ketones such as 2,3 pentadione 117 contribute to the sweet floral, fruity flavour of many crustacean (Cha et al, 1993;118 Josephson, 1990; Matiella and Hsieh, 1990). Ethyl acetate was also found in the brown 119 crab effluent and it was included in the model solution since could be considered as model 120 molecule (Baudot et al, 1999). 121 were obtained from the literature (Soni et al, 2008).…”

Section: Volatile Compounds 102mentioning

confidence: 99%

Concentration by pervaporation of representative brown crab volatile compounds from dilute model solutions

Martínez

Sanz

Beltrán

2011

Journal of Food Engineering

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“…Apparently, only two different substances have been considered so far, namely ethyl acetate (Leemann et al, 1996;Gales et al, 2002) and benzaldehyde (Fouda et al, 1993), whereas for pervaporation almost 60 different aroma compounds have already been examined (Baudot et al, 1999). In this work, bearing in mind the close relation between these two membranes techniques, a method for employing pervaporation data in the modelling of vapour permeation modules is proposed.…”

Section: Introductionmentioning

confidence: 99%

Using pervaporation data in the calculation of vapour permeation hollow-fibre modules for aroma recovery

Ribeiro

Borges

2004

Braz. J. Chem. Eng.

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-Taking into account the close similarity between pervaporation and vapour permeation techniques, a method for employing pervaporation flux data in the modelling of vapour permeation modules is proposed. It is based on the use of fugacity gradients across the membrane, instead of concentration ones, as the driving force for mass transfer. This procedure is interesting, for instance, in the case of aroma recovery systems, for which there is much more experimental data on pervaporation available in the literature than on vapour permeation. In order to illustrate the application of this method, pervaporation experiments for an isotropic PDMS membrane were conducted with aqueous solutions of ethyl acetate (113-2474 mg/L), and the results obtained were used to enable simulation of different vapour permeation hollow-fibre modules for recovering ethyl acetate from diluted air streams.

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Total permeate pressure influence on the selectivity of the pervaporation of aroma compounds

Cited by 57 publications

References 26 publications

In Situ CO2 and O2 Measurements on a Profiling Float

In Situ CO2 and O2 Measurements on a Profiling Float

Concentration by pervaporation of representative brown crab volatile compounds from dilute model solutions

Using pervaporation data in the calculation of vapour permeation hollow-fibre modules for aroma recovery

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