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
2021-10-01
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| Series: | Catalysts |
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| Online Access: | https://www.mdpi.com/2073-4344/11/11/1320 |
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| 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 |
| collection | DOAJ |
| 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. |
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| institution | Directory Open Access Journal |
| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-10T05:38:11Z |
| publishDate | 2021-10-01 |
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| record_format | Article |
| series | Catalysts |
| spelling | doaj.art-4746b6e8722542309951cb193cd84c9c2023-11-22T22:45:27ZengMDPI AGCatalysts2073-43442021-10-011111132010.3390/catal11111320Stabilization 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 COArturo Pallares-García0José Luis Contreras1Jennipher Pérez-Cabrera2Beatriz Zeifert3Tamara Vázquez4José Salmones5Miguel Angel Gutiérrez-Limón6Department of Energy, CBI, Metropolitan Autonomous University-Azcapotzalco, Av. San Pablo 180, Col. Reynosa, México City C.P. 02200, MexicoDepartment of Energy, CBI, Metropolitan Autonomous University-Azcapotzalco, Av. San Pablo 180, Col. Reynosa, México City C.P. 02200, MexicoDepartment of Energy, CBI, Metropolitan Autonomous University-Azcapotzalco, Av. San Pablo 180, Col. Reynosa, México City C.P. 02200, MexicoDepartment of Engineering in Metallurgy and Materials, ESIQIE, National Polytechnic Institute, Av. IPN Col. Lindavista, Mexico City C.P. 07738, MexicoDepartment of Engineering in Metallurgy and Materials, ESIQIE, National Polytechnic Institute, Av. IPN Col. Lindavista, Mexico City C.P. 07738, MexicoDepartment of Engineering in Metallurgy and Materials, ESIQIE, National Polytechnic Institute, Av. IPN Col. Lindavista, Mexico City C.P. 07738, MexicoDepartment of Energy, CBI, Metropolitan Autonomous University-Azcapotzalco, Av. San Pablo 180, Col. Reynosa, México City C.P. 02200, MexicoThis 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.https://www.mdpi.com/2073-4344/11/11/1320CO combustion promoterPt/SiO<sub>2</sub>–Al<sub>2</sub>O<sub>3</sub>–WO<i>x</i> catalystspherical particlesspray dryingrotary atomizer disks |
| spellingShingle | 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 Catalysts 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 |
| 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_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_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_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 |
| 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 |
| url | https://www.mdpi.com/2073-4344/11/11/1320 |
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