Selective Oxidation of Hydrogen Sulfide to Sulfur Using Vanadium Oxide Supported on Porous Clay Heterostructures (PCHs) Formed by Pillars Silica, Silica-Zirconia or Silica-Titania
Vanadium oxide (V2O5) species has been supported on different porous clay heterostructures (with silica pillars, silica-zirconia with a molar ratio Si/Zr = 5 and silica-titania with a molar ratio Si/Ti = 5) by wetness incipient method. All catalysts were characterized by X-ray diffraction (XRD), N2...
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MDPI AG
2018-08-01
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| Online Access: | http://www.mdpi.com/1996-1944/11/9/1562 |
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| author | Juan Antonio Cecilia M. Dolores Soriano Alejandro Natoli Enrique Rodríguez-Castellón José Manuel López Nieto |
| author_facet | Juan Antonio Cecilia M. Dolores Soriano Alejandro Natoli Enrique Rodríguez-Castellón José Manuel López Nieto |
| author_sort | Juan Antonio Cecilia |
| collection | DOAJ |
| description | Vanadium oxide (V2O5) species has been supported on different porous clay heterostructures (with silica pillars, silica-zirconia with a molar ratio Si/Zr = 5 and silica-titania with a molar ratio Si/Ti = 5) by wetness incipient method. All catalysts were characterized by X-ray diffraction (XRD), N2 adsorption-desorption at −196 °C, NH3 thermoprogrammed desorption (NH3-TPD), Raman spectroscopy, diffuse reflectance UV-Vis and X-ray photoelectron spectroscopy (XPS). After that, the catalytic activity of the vanadium-based catalysts was evaluated in the selective oxidation of H2S to elemental sulfur. The catalytic data show that both the activity and the catalytic stability increase with the vanadium content, obtaining the highest conversion values and sulfur yield for the catalysts with vanadium content of 16 wt.%. The comparison among all supports reveals that the incorporation of TiO2 species in the pillars of the PCH improves the resistance to the deactivation, attaining as best results a H2S conversion of 89% for SiTi-PCH-16V catalyst and elemental sulfur is the only compound detected by gas chromatography. |
| first_indexed | 2024-04-13T16:09:11Z |
| format | Article |
| id | doaj.art-a43a8a87b0ac4b508690517cad1113d8 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-04-13T16:09:11Z |
| publishDate | 2018-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-a43a8a87b0ac4b508690517cad1113d82022-12-22T02:40:18ZengMDPI AGMaterials1996-19442018-08-01119156210.3390/ma11091562ma11091562Selective Oxidation of Hydrogen Sulfide to Sulfur Using Vanadium Oxide Supported on Porous Clay Heterostructures (PCHs) Formed by Pillars Silica, Silica-Zirconia or Silica-TitaniaJuan Antonio Cecilia0M. Dolores Soriano1Alejandro Natoli2Enrique Rodríguez-Castellón3José Manuel López Nieto4Departamento Química Inorgánica, Cristalografía y Mineralogía, Facultad de Ciencias, Unidad Asociada al ICP-CSIC, Universidad de Málaga, 29071 Málaga, SpainInstituto de Tecnología Química, UPV-CSIC, Campus Universidad Politécnica de Valencia, Avenida de los Naranjos s/n, 46022 Valencia, SpainDepartment of Materials and Ceramic Engineering, CICECO, University of Aveiro, 3810-193 Aveiro, PortugalDepartamento Química Inorgánica, Cristalografía y Mineralogía, Facultad de Ciencias, Unidad Asociada al ICP-CSIC, Universidad de Málaga, 29071 Málaga, SpainInstituto de Tecnología Química, UPV-CSIC, Campus Universidad Politécnica de Valencia, Avenida de los Naranjos s/n, 46022 Valencia, SpainVanadium oxide (V2O5) species has been supported on different porous clay heterostructures (with silica pillars, silica-zirconia with a molar ratio Si/Zr = 5 and silica-titania with a molar ratio Si/Ti = 5) by wetness incipient method. All catalysts were characterized by X-ray diffraction (XRD), N2 adsorption-desorption at −196 °C, NH3 thermoprogrammed desorption (NH3-TPD), Raman spectroscopy, diffuse reflectance UV-Vis and X-ray photoelectron spectroscopy (XPS). After that, the catalytic activity of the vanadium-based catalysts was evaluated in the selective oxidation of H2S to elemental sulfur. The catalytic data show that both the activity and the catalytic stability increase with the vanadium content, obtaining the highest conversion values and sulfur yield for the catalysts with vanadium content of 16 wt.%. The comparison among all supports reveals that the incorporation of TiO2 species in the pillars of the PCH improves the resistance to the deactivation, attaining as best results a H2S conversion of 89% for SiTi-PCH-16V catalyst and elemental sulfur is the only compound detected by gas chromatography.http://www.mdpi.com/1996-1944/11/9/1562porous clay heterostructurePCHV2O5H2S selective oxidationsulfur elemental |
| spellingShingle | Juan Antonio Cecilia M. Dolores Soriano Alejandro Natoli Enrique Rodríguez-Castellón José Manuel López Nieto Selective Oxidation of Hydrogen Sulfide to Sulfur Using Vanadium Oxide Supported on Porous Clay Heterostructures (PCHs) Formed by Pillars Silica, Silica-Zirconia or Silica-Titania Materials porous clay heterostructure PCH V2O5 H2S selective oxidation sulfur elemental |
| title | Selective Oxidation of Hydrogen Sulfide to Sulfur Using Vanadium Oxide Supported on Porous Clay Heterostructures (PCHs) Formed by Pillars Silica, Silica-Zirconia or Silica-Titania |
| title_full | Selective Oxidation of Hydrogen Sulfide to Sulfur Using Vanadium Oxide Supported on Porous Clay Heterostructures (PCHs) Formed by Pillars Silica, Silica-Zirconia or Silica-Titania |
| title_fullStr | Selective Oxidation of Hydrogen Sulfide to Sulfur Using Vanadium Oxide Supported on Porous Clay Heterostructures (PCHs) Formed by Pillars Silica, Silica-Zirconia or Silica-Titania |
| title_full_unstemmed | Selective Oxidation of Hydrogen Sulfide to Sulfur Using Vanadium Oxide Supported on Porous Clay Heterostructures (PCHs) Formed by Pillars Silica, Silica-Zirconia or Silica-Titania |
| title_short | Selective Oxidation of Hydrogen Sulfide to Sulfur Using Vanadium Oxide Supported on Porous Clay Heterostructures (PCHs) Formed by Pillars Silica, Silica-Zirconia or Silica-Titania |
| title_sort | selective oxidation of hydrogen sulfide to sulfur using vanadium oxide supported on porous clay heterostructures pchs formed by pillars silica silica zirconia or silica titania |
| topic | porous clay heterostructure PCH V2O5 H2S selective oxidation sulfur elemental |
| url | http://www.mdpi.com/1996-1944/11/9/1562 |
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