Stabilization of Pt in SiO<sub>2</sub>–Al<sub>2</sub>O<sub>3</sub> Microspheres at High Mechanical Resistance, Promoted with W Oxides for the Combustion of CO
This study shows the development of a combustion promoter for the oil-refining process called fluid catalytic cracking (FCC). The investigation of a catalyst prepared for the combustion of CO composed of 0.05 wt% Pt supported on SiO<sub>2</sub>–Al<sub>2</sub>O<sub>3<...
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MDPI AG
2021
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oai:doaj.org-article:4746b6e8722542309951cb193cd84c9c2021-11-25T17:05:51ZStabilization of Pt in SiO<sub>2</sub>–Al<sub>2</sub>O<sub>3</sub> Microspheres at High Mechanical Resistance, Promoted with W Oxides for the Combustion of CO10.3390/catal111113202073-4344https://doaj.org/article/4746b6e8722542309951cb193cd84c9c2021-10-01T00:00:00Zhttps://www.mdpi.com/2073-4344/11/11/1320https://doaj.org/toc/2073-4344This study shows the development of a combustion promoter for the oil-refining process called fluid catalytic cracking (FCC). The investigation of a catalyst prepared for the combustion of CO composed of 0.05 wt% Pt supported on SiO<sub>2</sub>–Al<sub>2</sub>O<sub>3</sub>–0.5 wt% W microspheres with high mechanical resistance, promoted with tungsten oxides (WOx) that can inhibit the sintering of Pt, is reported. The addition of WO<i>x</i> in SiO<sub>2</sub>–Al<sub>2</sub>O<sub>3</sub> inhibited the decrease in the specific area when calcined from 550 °C to 950 °C. SiO<sub>2</sub>–Al<sub>2</sub>O<sub>3</sub> support in the form of calcined microspheres with average diameters between 70–105 µm were produced by spray drying, using two atomization discs with vanes of different geometry: a straight rectangular blade disc (DAR) and a curved rectangular vanes disc (DAC). The DAR disk produced whole microspheres, while the DAC had hollow and broken microspheres. The microspheres were characterized by XRD, SEM, optical microscopy, N<sub>2</sub> physisorption (BET area) and fracture resistance tests. The Pt catalysts were evaluated by TPR, H<sub>2</sub> chemisorption and CO combustion. The catalyst of 0.05 wt% Pt/SiO<sub>2</sub>–Al<sub>2</sub>O<sub>3</sub>–0.5 wt% turned out to be the most stable. A thermal stabilization effect was observed at contents lower than 1 wt% W that allowed it to inhibit the sintering of the Pt catalyst.Arturo Pallares-GarcíaJosé Luis ContrerasJennipher Pérez-CabreraBeatriz ZeifertTamara VázquezJosé SalmonesMiguel Angel Gutiérrez-LimónMDPI AGarticleCO combustion promoterPt/SiO<sub>2</sub>–Al<sub>2</sub>O<sub>3</sub>–WO<i>x</i> catalystspherical particlesspray dryingrotary atomizer disksChemical technologyTP1-1185ChemistryQD1-999ENCatalysts, Vol 11, Iss 1320, p 1320 (2021) |
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| collection |
DOAJ |
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| topic |
CO combustion promoter Pt/SiO<sub>2</sub>–Al<sub>2</sub>O<sub>3</sub>–WO<i>x</i> catalyst spherical particles spray drying rotary atomizer disks Chemical technology TP1-1185 Chemistry QD1-999 |
| spellingShingle |
CO combustion promoter Pt/SiO<sub>2</sub>–Al<sub>2</sub>O<sub>3</sub>–WO<i>x</i> catalyst spherical particles spray drying rotary atomizer disks Chemical technology TP1-1185 Chemistry QD1-999 Arturo Pallares-García José Luis Contreras Jennipher Pérez-Cabrera Beatriz Zeifert Tamara Vázquez José Salmones Miguel Angel Gutiérrez-Limón Stabilization of Pt in SiO<sub>2</sub>–Al<sub>2</sub>O<sub>3</sub> Microspheres at High Mechanical Resistance, Promoted with W Oxides for the Combustion of CO |
| description |
This study shows the development of a combustion promoter for the oil-refining process called fluid catalytic cracking (FCC). The investigation of a catalyst prepared for the combustion of CO composed of 0.05 wt% Pt supported on SiO<sub>2</sub>–Al<sub>2</sub>O<sub>3</sub>–0.5 wt% W microspheres with high mechanical resistance, promoted with tungsten oxides (WOx) that can inhibit the sintering of Pt, is reported. The addition of WO<i>x</i> in SiO<sub>2</sub>–Al<sub>2</sub>O<sub>3</sub> inhibited the decrease in the specific area when calcined from 550 °C to 950 °C. SiO<sub>2</sub>–Al<sub>2</sub>O<sub>3</sub> support in the form of calcined microspheres with average diameters between 70–105 µm were produced by spray drying, using two atomization discs with vanes of different geometry: a straight rectangular blade disc (DAR) and a curved rectangular vanes disc (DAC). The DAR disk produced whole microspheres, while the DAC had hollow and broken microspheres. The microspheres were characterized by XRD, SEM, optical microscopy, N<sub>2</sub> physisorption (BET area) and fracture resistance tests. The Pt catalysts were evaluated by TPR, H<sub>2</sub> chemisorption and CO combustion. The catalyst of 0.05 wt% Pt/SiO<sub>2</sub>–Al<sub>2</sub>O<sub>3</sub>–0.5 wt% turned out to be the most stable. A thermal stabilization effect was observed at contents lower than 1 wt% W that allowed it to inhibit the sintering of the Pt catalyst. |
| format |
article |
| author |
Arturo Pallares-García José Luis Contreras Jennipher Pérez-Cabrera Beatriz Zeifert Tamara Vázquez José Salmones Miguel Angel Gutiérrez-Limón |
| author_facet |
Arturo Pallares-García José Luis Contreras Jennipher Pérez-Cabrera Beatriz Zeifert Tamara Vázquez José Salmones Miguel Angel Gutiérrez-Limón |
| author_sort |
Arturo Pallares-García |
| title |
Stabilization of Pt in SiO<sub>2</sub>–Al<sub>2</sub>O<sub>3</sub> Microspheres at High Mechanical Resistance, Promoted with W Oxides for the Combustion of CO |
| title_short |
Stabilization of Pt in SiO<sub>2</sub>–Al<sub>2</sub>O<sub>3</sub> Microspheres at High Mechanical Resistance, Promoted with W Oxides for the Combustion of CO |
| title_full |
Stabilization of Pt in SiO<sub>2</sub>–Al<sub>2</sub>O<sub>3</sub> Microspheres at High Mechanical Resistance, Promoted with W Oxides for the Combustion of CO |
| title_fullStr |
Stabilization of Pt in SiO<sub>2</sub>–Al<sub>2</sub>O<sub>3</sub> Microspheres at High Mechanical Resistance, Promoted with W Oxides for the Combustion of CO |
| title_full_unstemmed |
Stabilization of Pt in SiO<sub>2</sub>–Al<sub>2</sub>O<sub>3</sub> Microspheres at High Mechanical Resistance, Promoted with W Oxides for the Combustion of CO |
| title_sort |
stabilization of pt in sio<sub>2</sub>–al<sub>2</sub>o<sub>3</sub> microspheres at high mechanical resistance, promoted with w oxides for the combustion of co |
| publisher |
MDPI AG |
| publishDate |
2021 |
| url |
https://doaj.org/article/4746b6e8722542309951cb193cd84c9c |
| work_keys_str_mv |
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