Promotional Role of Pd Over Ni Catalyst Dispersed Over Sc‐ZrO₂ for Methane Partial Oxidation: Crystallinity and Reducibility Effects
ABSTRACT Natural emissions of the highly potent greenhouse gas methane cannot be completely prevented, but in the presence of O2, methane can be catalytically converted to hydrogen‐rich syngas. This reaction is specified as partial oxidation of methane (POM). Herein, Ni dispersed over “scandia‐stabi...
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| Format: | Article |
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Wiley
2025-08-01
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| Series: | Energy Science & Engineering |
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| Online Access: | https://doi.org/10.1002/ese3.70140 |
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| author | Norah Alwadai Kenit Acharya Ahmed A. Ibrahim Salwa Bader Alreshaidan Mohammed O. Bayazed Ahmed I. Osman Nawaf N. Alotaibi Talal F. Qahtan Gui‐Ping Cao Rawesh Kumar Ahmed S. Al‐Fatesh |
| author_facet | Norah Alwadai Kenit Acharya Ahmed A. Ibrahim Salwa Bader Alreshaidan Mohammed O. Bayazed Ahmed I. Osman Nawaf N. Alotaibi Talal F. Qahtan Gui‐Ping Cao Rawesh Kumar Ahmed S. Al‐Fatesh |
| author_sort | Norah Alwadai |
| collection | DOAJ |
| description | ABSTRACT Natural emissions of the highly potent greenhouse gas methane cannot be completely prevented, but in the presence of O2, methane can be catalytically converted to hydrogen‐rich syngas. This reaction is specified as partial oxidation of methane (POM). Herein, Ni dispersed over “scandia‐stabilized‐zirconia” (5Ni/DSZ) and the promotional effect of Pd (0.01 to 0.1 wt%) are investigated for POM and characterized with surface area and porosity measurements, X‐ray diffraction, Raman spectroscopy, temperature‐programmed studies, and thermogravimetry. During the POM, the initial population of active Ni sites decreases in non‐promoted catalysts due to oxidation under oxygen, upon loading of 0.02 wt.% Pd over 5Ni/DSZ, the active site population is preserved against oxygen during the POM due to improved metal support interaction between Ni and long‐range order crystallites of support (like cubic ZrO2 and orthorhombic Sc2Zr5O13). 5Ni0.02 Pd/DSZ catalyst acquired more than 80% catalytic activity (CH4 conversion and H2 yield) with 2.5 H2/CO ratio at 600°C during 240 min on stream. The 5Ni0.02 Pd/DSZ catalyst also maintained more than 70% H2 yield with H2/CO ratio ~2 during 30 h time on stream. The thermostable 5Ni0.02 Pd/DSZ catalyst may be recommended for hydrogen‐rich syngas production with high H2‐yield through POM. |
| format | Article |
| id | doaj-art-8f5a097caa2a4c6fbb15267c49dbdce8 |
| institution | Kabale University |
| issn | 2050-0505 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | Wiley |
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| series | Energy Science & Engineering |
| spelling | doaj-art-8f5a097caa2a4c6fbb15267c49dbdce82025-08-20T03:41:43ZengWileyEnergy Science & Engineering2050-05052025-08-011383935394410.1002/ese3.70140Promotional Role of Pd Over Ni Catalyst Dispersed Over Sc‐ZrO₂ for Methane Partial Oxidation: Crystallinity and Reducibility EffectsNorah Alwadai0Kenit Acharya1Ahmed A. Ibrahim2Salwa Bader Alreshaidan3Mohammed O. Bayazed4Ahmed I. Osman5Nawaf N. Alotaibi6Talal F. Qahtan7Gui‐Ping Cao8Rawesh Kumar9Ahmed S. Al‐Fatesh10Department of Physics College of Science Princess Nourah bint Abdulrahman University Riyadh 11671 Saudi ArabiaDepartment of Chemistry Indus University Ahmedabad Gujarat IndiaChemical Engineering Department College of Engineering King Saud University (KSU) Riyadh 11421 Saudi ArabiaDepartment of Chemistry Faculty of Science King Saud University Riyadh 11451 Saudi ArabiaChemical Engineering Department College of Engineering King Saud University (KSU) Riyadh 11421 Saudi ArabiaSchool of Engineering, Technology, and Design Canterbury Christ Church University Canterbury UKInstitute of Refining and Petrochemicals Technologies King Abdulaziz City for Science and Technology (KACST) Riyadh Saudi ArabiaPhysics Department College of Science and Humanities in Al‐Kharj Prince Sattam Bin Abdulaziz University Al‐Kharj 11942 Saudi ArabiaUNILAB, State Key Laboratory of Chemical Engineering East China University of Science and Technology Shanghai ChinaDepartment of Chemistry, Patna Science College Patna University Bihar IndiaChemical Engineering Department College of Engineering King Saud University (KSU) Riyadh 11421 Saudi ArabiaABSTRACT Natural emissions of the highly potent greenhouse gas methane cannot be completely prevented, but in the presence of O2, methane can be catalytically converted to hydrogen‐rich syngas. This reaction is specified as partial oxidation of methane (POM). Herein, Ni dispersed over “scandia‐stabilized‐zirconia” (5Ni/DSZ) and the promotional effect of Pd (0.01 to 0.1 wt%) are investigated for POM and characterized with surface area and porosity measurements, X‐ray diffraction, Raman spectroscopy, temperature‐programmed studies, and thermogravimetry. During the POM, the initial population of active Ni sites decreases in non‐promoted catalysts due to oxidation under oxygen, upon loading of 0.02 wt.% Pd over 5Ni/DSZ, the active site population is preserved against oxygen during the POM due to improved metal support interaction between Ni and long‐range order crystallites of support (like cubic ZrO2 and orthorhombic Sc2Zr5O13). 5Ni0.02 Pd/DSZ catalyst acquired more than 80% catalytic activity (CH4 conversion and H2 yield) with 2.5 H2/CO ratio at 600°C during 240 min on stream. The 5Ni0.02 Pd/DSZ catalyst also maintained more than 70% H2 yield with H2/CO ratio ~2 during 30 h time on stream. The thermostable 5Ni0.02 Pd/DSZ catalyst may be recommended for hydrogen‐rich syngas production with high H2‐yield through POM.https://doi.org/10.1002/ese3.70140crystallinityNi catalystPd‐promoterPOMreducibilityscandia‐stabilized‐zirconia |
| spellingShingle | Norah Alwadai Kenit Acharya Ahmed A. Ibrahim Salwa Bader Alreshaidan Mohammed O. Bayazed Ahmed I. Osman Nawaf N. Alotaibi Talal F. Qahtan Gui‐Ping Cao Rawesh Kumar Ahmed S. Al‐Fatesh Promotional Role of Pd Over Ni Catalyst Dispersed Over Sc‐ZrO₂ for Methane Partial Oxidation: Crystallinity and Reducibility Effects Energy Science & Engineering crystallinity Ni catalyst Pd‐promoter POM reducibility scandia‐stabilized‐zirconia |
| title | Promotional Role of Pd Over Ni Catalyst Dispersed Over Sc‐ZrO₂ for Methane Partial Oxidation: Crystallinity and Reducibility Effects |
| title_full | Promotional Role of Pd Over Ni Catalyst Dispersed Over Sc‐ZrO₂ for Methane Partial Oxidation: Crystallinity and Reducibility Effects |
| title_fullStr | Promotional Role of Pd Over Ni Catalyst Dispersed Over Sc‐ZrO₂ for Methane Partial Oxidation: Crystallinity and Reducibility Effects |
| title_full_unstemmed | Promotional Role of Pd Over Ni Catalyst Dispersed Over Sc‐ZrO₂ for Methane Partial Oxidation: Crystallinity and Reducibility Effects |
| title_short | Promotional Role of Pd Over Ni Catalyst Dispersed Over Sc‐ZrO₂ for Methane Partial Oxidation: Crystallinity and Reducibility Effects |
| title_sort | promotional role of pd over ni catalyst dispersed over sc zro₂ for methane partial oxidation crystallinity and reducibility effects |
| topic | crystallinity Ni catalyst Pd‐promoter POM reducibility scandia‐stabilized‐zirconia |
| url | https://doi.org/10.1002/ese3.70140 |
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