The role of water in DCE adsorption from aqueous solutions onto hydrophobic zeolites

Pasti, Luisa; Martucci, Annalisa; Nassi, Marianna; Cavazzini, Alberto; Alberti, A.; Bagatin, Roberto

doi:10.1016/j.micromeso.2012.05.015

Cited by 35 publications

(75 citation statements)

References 54 publications

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“…It can be seen that the kinetics of the adsorption process was very fast; the equilibrium was reached in about 10 min. Similar behaviors were also observed for the adsorption of other aqueous contaminants, such as dichloroethane and toluene onto ZSM-5 and Y zeolites [5][6][7][8][9][10]13].…”

Section: Adsorption Isotherms From Aqueous Solutionssupporting

confidence: 66%

“…We have previously verified [5][6][7][8][9][10]13] that uptake data of the investigated zeolites can be fitted by the pseudo-second order model as:…”

Section: Adsorption Isotherms From Aqueous Solutionsmentioning

confidence: 92%

“…It has been already shown that adsorption of organics in aqueous solutions onto ZSM-5 hydrophobic zeolites are well fitted by the Langmuir equation [5,6,8,13], that assumes monolayer adsorption onto energetically equivalent adsorption sites and negligible sorbate-sorbate interactions. The relationships describing the Langmuir isotherm is [38]:…”

Section: Adsorption Isotherms From Aqueous Solutionsmentioning

confidence: 96%

“…Topological symmetry of the unloaded material is cubic Fd-3m, but it has been highlighted that the embedding of organic compounds can decrease the symmetry to Fd-3 [10][11][12][13]43]. A careful examination of powder diffraction patterns after chlorobenzene adsorption highlights that Y-CB peak positions are quite similar to those of the as-synthetized material in all the 2θ range investigated.…”

Section: Y-cbmentioning

confidence: 97%

“…Actually, the physical method based on adsorption processes is a recuperative method exploited for in situ water treatments which combines high flexibility of the system, efficiency even at low concentration levels, low energy, cheap operating costs, and possible waste reductions [3]. Different adsorbent materials can be employed, and their efficiency depends on the host-guest interactions between sorbent and sorbate [4][5][6][7][8][9][10][11][12][13]. In general, carbonaceous adsorbents are low cost materials, widely employed in remediation technology.…”

Section: Introductionmentioning

confidence: 99%

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Insights into Adsorption of Chlorobenzene in High Silica MFI and FAU Zeolites Gained from Chromatographic and Diffractometric Techniques

et al. 2018

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Abstract:In this work, the capability of two commercial high silica zeolites (HSZs), namely ZSM-5 and Y, for the removal of chlorobenzene (CB) from water was investigated by combining chromatographic and diffractometric techniques. The adsorption isotherms and kinetics of CB on ZSM-5 and Y zeolites were determined from batch tests. The adsorption kinetics were very fast; the time to reach equilibrium was less than 10 min. The equilibrium data of CB on the two HSZs showed dissimilarities that are particularly evident in the adsorption data concerning the low concentration range, where Y zeolite is characterized by low adsorption. On the contrary, at higher solution concentrations the adsorption capacity of Y is higher than that of ZSM-5. The crystalline structures of Y and ZSM-5 saturated with CB were investigated by X-ray diffraction (XRD) techniques. Rietveld refinement analyses of XRD data allowed for quantitative probing of the structural modifications of both zeolites after CB adsorption and provided insight into the preferred zeolite adsorption sites in both microporous materials. The refined framework-extraframework bond distances confirm that interactions between the selected organic contaminant and hydrophobic zeolites are mediated via co-adsorbed H 2 O. The occurrence of H 2 O-CB-framework oxygen oligomers explains variations in both the unit cell parameters and the shape of the channels, clearly confirming that water plays a very relevant role in controlling the diffusion and adsorption processes in hydrophobic zeolites.

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Section: Adsorption Isotherms From Aqueous Solutionssupporting

confidence: 66%

“…We have previously verified [5][6][7][8][9][10]13] that uptake data of the investigated zeolites can be fitted by the pseudo-second order model as:…”

Section: Adsorption Isotherms From Aqueous Solutionsmentioning

confidence: 92%

Section: Adsorption Isotherms From Aqueous Solutionsmentioning

confidence: 96%

Section: Y-cbmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

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Insights into Adsorption of Chlorobenzene in High Silica MFI and FAU Zeolites Gained from Chromatographic and Diffractometric Techniques

et al. 2018

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Bewertung von Adsorbenzien zur Kraftstoffdampfnachbehandlung in Adsorbern für Personenkraftwagen

Hedwig¹,

Breitkopf

2016

Chemie Ingenieur Technik

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Die Herausforderungen an die Kraftstoffdampfnachbehandlung in Adsorbern ottomotorisch betriebener PKW steigen infolge zunehmender Emissionsrestriktionen an. Die Arbeitskapazität des Adsorbers ist maßgeblich durch die Sorptionsfähigkeit des darin enthaltenen Adsorbens limitiert und von dem zu adsorbierenden Kraftstoffdampf abhängig. Anhand einer Charakterisierung repräsentativer Kraftstoffe werden hier die dazugehörigen Adsorptivgemische erschlossen. Darauf aufbauend erfolgt in Form einer Gegenüberstellung charakteristischer Stoffeigenschaften eine Bewertung und Auswahl geeigneter Absorbenzien.

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Inside Cover Picture: Rapid Trifluoromethylation and Perfluoroalkylation of Five‐Membered Heterocycles by Photoredox Catalysis in Continuous Flow (ChemSusChem 6/2014)

et al. 2014

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The Inside Cover picture shows how trifluoromethylated and perfluoroalkylated heterocycles can be prepared by continuous‐flow photoredox catalysis utilizing [Ru(bpy)3] and blue light irradiation. Spectacular accelerations are observed in microreactors because of the homogeneous irradiation of the reaction sample and the optimal gas‐liquid mass transfer. The mild reaction conditions should facilitate the implementation of this methodology in both academia and industry. More details can be found in the Communication by Noël et al. on page 1612 (DOI: ).

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The role of water in DCE adsorption from aqueous solutions onto hydrophobic zeolites

Cited by 35 publications

References 54 publications

Insights into Adsorption of Chlorobenzene in High Silica MFI and FAU Zeolites Gained from Chromatographic and Diffractometric Techniques

Insights into Adsorption of Chlorobenzene in High Silica MFI and FAU Zeolites Gained from Chromatographic and Diffractometric Techniques

Bewertung von Adsorbenzien zur Kraftstoffdampfnachbehandlung in Adsorbern für Personenkraftwagen

Inside Cover Picture: Rapid Trifluoromethylation and Perfluoroalkylation of Five‐Membered Heterocycles by Photoredox Catalysis in Continuous Flow (ChemSusChem 6/2014)

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