Separation of Oxygen and Nitrogen by Porous Cyanometallates

B. Zamora; M. Autie; J. L. Contreras; M. Centeno; E. Reguera

doi:10.1080/01496390903571101

Separation of Oxygen and Nitrogen by Porous Cyanometallates

B. Zamora, M. Autie, J. L. Contreras, M. Centeno, E. Reguera

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13 Scopus citations

Abstract

The adsorption-based separation in porous solids takes place through steric, kinetic, or equilibrium effect selectivity. In this contribution the oxygen-nitrogen separation by four porous frameworks representative of cyanometallates was studied by inverse gas chromatography. The following materials were considered: Cd₃[Co(CN)₆]₂ (cubic), Zn₃[Co(CN)₆]₂ (rhombohedral), Zn₃K₂[Fe(CN)₆]₂ (rhombohedral) and Co[Fe(CN)₅NO] (cubic). Chromatographic separation profiles from gases mixtures using columns of these materials were recorded. For columns prepared from rhombohedral zinc hexacyanocolbaltate(III) excellent separation of O₂ and N₂ was observed. Such behavior was attributed to a kinetic-based selectivity related to the size and shape for the pore windows of this material. The porous framework of this zinc phase is formed by ellipsoidal cavities (12.5 × 9 × 8 Å) communicated by elliptical windows of ~ 5 Å. For Cd₃[Co(CN)₆]₂ and Co[Fe(CN)₅NO] also kinetic-based selectivity was observed while for Zn₃K₂[Fe(CN)₆]₂ the K⁺ ion located close to the cavity windows hinders the porous windows accessibility for nitrogen and oxygen molecules. All the samples to be studied were characterized from X-ray diffraction, infrared spectroscopy, termogravimetric and adsorption data.

Original language	English
Pages (from-to)	692-699
Number of pages	8
Journal	Separation Science and Technology (Philadelphia)
Volume	45
Issue number	5
DOIs	https://doi.org/10.1080/01496390903571101
State	Published - Jan 2010
Externally published	Yes

Keywords

Adsorption
Air separation
Porous solids
Prussian blue analogue

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10.1080/01496390903571101

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title = "Separation of Oxygen and Nitrogen by Porous Cyanometallates",

abstract = "The adsorption-based separation in porous solids takes place through steric, kinetic, or equilibrium effect selectivity. In this contribution the oxygen-nitrogen separation by four porous frameworks representative of cyanometallates was studied by inverse gas chromatography. The following materials were considered: Cd3[Co(CN)6]2 (cubic), Zn3[Co(CN)6]2 (rhombohedral), Zn3K2[Fe(CN)6]2 (rhombohedral) and Co[Fe(CN)5NO] (cubic). Chromatographic separation profiles from gases mixtures using columns of these materials were recorded. For columns prepared from rhombohedral zinc hexacyanocolbaltate(III) excellent separation of O2 and N2 was observed. Such behavior was attributed to a kinetic-based selectivity related to the size and shape for the pore windows of this material. The porous framework of this zinc phase is formed by ellipsoidal cavities (12.5 × 9 × 8 {\AA}) communicated by elliptical windows of ~ 5 {\AA}. For Cd3[Co(CN)6]2 and Co[Fe(CN)5NO] also kinetic-based selectivity was observed while for Zn3K2[Fe(CN)6]2 the K+ ion located close to the cavity windows hinders the porous windows accessibility for nitrogen and oxygen molecules. All the samples to be studied were characterized from X-ray diffraction, infrared spectroscopy, termogravimetric and adsorption data.",

keywords = "Adsorption, Air separation, Porous solids, Prussian blue analogue",

author = "B. Zamora and M. Autie and Contreras, {J. L.} and M. Centeno and E. Reguera",

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T1 - Separation of Oxygen and Nitrogen by Porous Cyanometallates

AU - Zamora, B.

AU - Autie, M.

AU - Contreras, J. L.

AU - Centeno, M.

AU - Reguera, E.

PY - 2010/1

Y1 - 2010/1

N2 - The adsorption-based separation in porous solids takes place through steric, kinetic, or equilibrium effect selectivity. In this contribution the oxygen-nitrogen separation by four porous frameworks representative of cyanometallates was studied by inverse gas chromatography. The following materials were considered: Cd3[Co(CN)6]2 (cubic), Zn3[Co(CN)6]2 (rhombohedral), Zn3K2[Fe(CN)6]2 (rhombohedral) and Co[Fe(CN)5NO] (cubic). Chromatographic separation profiles from gases mixtures using columns of these materials were recorded. For columns prepared from rhombohedral zinc hexacyanocolbaltate(III) excellent separation of O2 and N2 was observed. Such behavior was attributed to a kinetic-based selectivity related to the size and shape for the pore windows of this material. The porous framework of this zinc phase is formed by ellipsoidal cavities (12.5 × 9 × 8 Å) communicated by elliptical windows of ~ 5 Å. For Cd3[Co(CN)6]2 and Co[Fe(CN)5NO] also kinetic-based selectivity was observed while for Zn3K2[Fe(CN)6]2 the K+ ion located close to the cavity windows hinders the porous windows accessibility for nitrogen and oxygen molecules. All the samples to be studied were characterized from X-ray diffraction, infrared spectroscopy, termogravimetric and adsorption data.

AB - The adsorption-based separation in porous solids takes place through steric, kinetic, or equilibrium effect selectivity. In this contribution the oxygen-nitrogen separation by four porous frameworks representative of cyanometallates was studied by inverse gas chromatography. The following materials were considered: Cd3[Co(CN)6]2 (cubic), Zn3[Co(CN)6]2 (rhombohedral), Zn3K2[Fe(CN)6]2 (rhombohedral) and Co[Fe(CN)5NO] (cubic). Chromatographic separation profiles from gases mixtures using columns of these materials were recorded. For columns prepared from rhombohedral zinc hexacyanocolbaltate(III) excellent separation of O2 and N2 was observed. Such behavior was attributed to a kinetic-based selectivity related to the size and shape for the pore windows of this material. The porous framework of this zinc phase is formed by ellipsoidal cavities (12.5 × 9 × 8 Å) communicated by elliptical windows of ~ 5 Å. For Cd3[Co(CN)6]2 and Co[Fe(CN)5NO] also kinetic-based selectivity was observed while for Zn3K2[Fe(CN)6]2 the K+ ion located close to the cavity windows hinders the porous windows accessibility for nitrogen and oxygen molecules. All the samples to be studied were characterized from X-ray diffraction, infrared spectroscopy, termogravimetric and adsorption data.

KW - Adsorption

KW - Air separation

KW - Porous solids

KW - Prussian blue analogue

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DO - 10.1080/01496390903571101

M3 - Artículo

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JO - Separation Science and Technology (Philadelphia)

JF - Separation Science and Technology (Philadelphia)

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ER -

Separation of Oxygen and Nitrogen by Porous Cyanometallates

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