A stable hybrid material (Mt-Fe(III)Phen) formed by intercalation of the μ-oxo Fe(III)-phenanthroline complex [(OH⁠2)⁠3(Phen)FeOFe(Phen)(OH⁠2)⁠3]⁠4+ (Fe(III)Phen) in montmorillonite (Mt) is able to immobilize H⁠2S in gaseous phase with high efficiency even at extremely low pressures. DR UV–vis and I.R. spectroscopies, elemental analysis, X-ray powder diffraction, thermal analysis coupled with evolved gas mass spectrometry, and X-ray absorption spectroscopy show that the material has high adsorption capacity, performs fast H⁠2S trapping and is long-lasting. Moreover, even extremely low levels of H⁠2S can be removed easily and quickly from gaseous phase using a suitable amount of the trapping material. The immobilization mechanism likely involves a redox reaction between iron (III) and one S⁠2− ion, followed by the binding of a second S⁠2− ion to the metal centre. The process takes place at room temperature, is reversible for several cycles, and does not require pre-treatment of neither gaseous H⁠2S nor the adsorbent material. Therefore, this modified montmorillonite is a promising material to get rid of H⁠2S in processes of environmental interest and to obtain gaseous (and gasifiable) high quality hydrocarbons in fuels refineries.

Chemical trapping of gaseous H⁠2S at high and low partial pressures by an iron complex immobilized inside the montmorillonite interlayer / Malferrari, Daniele; Castellini, Elena; Bernini, Fabrizio; Serrano Rubio⁠, Aida; Rafael Castro, German; Ignacio Sainz-Díaz⁠, Claro; Caleffi, Matteo; Brigatti, Maria Franca; Borsari, Marco. - In: MICROPOROUS AND MESOPOROUS MATERIALS. - ISSN 1387-1811. - 265:(2018), pp. 8-17. [10.1016/j.micromeso.2018.01.017]

Chemical trapping of gaseous H⁠2S at high and low partial pressures by an iron complex immobilized inside the montmorillonite interlayer

Daniele Malferrari⁠;Elena Castellini⁠
;
Fabrizio Bernini⁠;Maria Franca Brigatti⁠;Marco Borsari
2018

Abstract

A stable hybrid material (Mt-Fe(III)Phen) formed by intercalation of the μ-oxo Fe(III)-phenanthroline complex [(OH⁠2)⁠3(Phen)FeOFe(Phen)(OH⁠2)⁠3]⁠4+ (Fe(III)Phen) in montmorillonite (Mt) is able to immobilize H⁠2S in gaseous phase with high efficiency even at extremely low pressures. DR UV–vis and I.R. spectroscopies, elemental analysis, X-ray powder diffraction, thermal analysis coupled with evolved gas mass spectrometry, and X-ray absorption spectroscopy show that the material has high adsorption capacity, performs fast H⁠2S trapping and is long-lasting. Moreover, even extremely low levels of H⁠2S can be removed easily and quickly from gaseous phase using a suitable amount of the trapping material. The immobilization mechanism likely involves a redox reaction between iron (III) and one S⁠2− ion, followed by the binding of a second S⁠2− ion to the metal centre. The process takes place at room temperature, is reversible for several cycles, and does not require pre-treatment of neither gaseous H⁠2S nor the adsorbent material. Therefore, this modified montmorillonite is a promising material to get rid of H⁠2S in processes of environmental interest and to obtain gaseous (and gasifiable) high quality hydrocarbons in fuels refineries.
265
8
17
Chemical trapping of gaseous H⁠2S at high and low partial pressures by an iron complex immobilized inside the montmorillonite interlayer / Malferrari, Daniele; Castellini, Elena; Bernini, Fabrizio; Serrano Rubio⁠, Aida; Rafael Castro, German; Ignacio Sainz-Díaz⁠, Claro; Caleffi, Matteo; Brigatti, Maria Franca; Borsari, Marco. - In: MICROPOROUS AND MESOPOROUS MATERIALS. - ISSN 1387-1811. - 265:(2018), pp. 8-17. [10.1016/j.micromeso.2018.01.017]
Malferrari, Daniele; Castellini, Elena; Bernini, Fabrizio; Serrano Rubio⁠, Aida; Rafael Castro, German; Ignacio Sainz-Díaz⁠, Claro; Caleffi, Matteo; Brigatti, Maria Franca; Borsari, Marco
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11380/1152786
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