H<sub>2</sub> Production from Catalytic Methane Decomposition Using Fe/x-ZrO<sub>2</sub> and Fe-Ni/(x-ZrO<sub>2</sub>) (x = 0, La<sub>2</sub>O<sub>3</sub>, WO<sub>3</sub>) Catalysts
An environmentally-benign way of producing hydrogen is methane decomposition. This study focused on methane decomposition using Fe and Fe-Ni catalysts, which were dispersed over different supports by the wet-impregnation method. We observed the effect of modifying ZrO<sub>2</sub> with La...
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MDPI AG
2020-07-01
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| Series: | Catalysts |
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| Online Access: | https://www.mdpi.com/2073-4344/10/7/793 |
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| author | Fahad Al-Mubaddel Samsudeen Kasim Ahmed A. Ibrahim Abdulrhman S. Al-Awadi Anis H. Fakeeha Ahmed S. Al-Fatesh |
| author_facet | Fahad Al-Mubaddel Samsudeen Kasim Ahmed A. Ibrahim Abdulrhman S. Al-Awadi Anis H. Fakeeha Ahmed S. Al-Fatesh |
| author_sort | Fahad Al-Mubaddel |
| collection | DOAJ |
| description | An environmentally-benign way of producing hydrogen is methane decomposition. This study focused on methane decomposition using Fe and Fe-Ni catalysts, which were dispersed over different supports by the wet-impregnation method. We observed the effect of modifying ZrO<sub>2</sub> with La<sub>2</sub>O<sub>3</sub> and WO<sub>3</sub> in terms of H<sub>2</sub> yield and carbon deposits. The modification led to a higher H<sub>2</sub> yield in all cases and WO<sub>3</sub>-modified support gave the highest yield of about 90% and was stable throughout the reaction period. The reaction conditions were at 1 atm, 800 °C, and 4000 mL(hg<sub>cat</sub>)<sup>−1</sup> space velocity. Adding Ni to Fe/x-ZrO<sub>2</sub> gave a higher H<sub>2</sub> yield and stability for ZrO<sub>2</sub> and La<sub>2</sub>O<sub>3</sub> + ZrO<sub>2</sub>-supported catalysts whose prior performances and stabilities were very poor. Catalyst samples were analyzed by characterization techniques like X-ray diffraction (XRD), nitrogen physisorption, temperature-programmed reduction (TPR), thermo-gravimetric analysis (TGA), and Raman spectroscopy. The phases of iron and the supports were identified using XRD while the BET revealed a significant decrease in the specific surface areas of fresh catalysts relative to supports. A progressive change in Fe’s oxidation state from Fe<sup>3+</sup> to Fe<sup>0</sup> was observed from the H<sub>2</sub>-TPR results. The carbon deposits on Fe/ZrO<sub>2</sub> and Fe/La<sub>2</sub>O<sub>3</sub> + ZrO<sub>2</sub> are mainly amorphous, while Fe/WO<sub>3</sub> + ZrO<sub>2</sub> and Fe-Ni/x-ZrO<sub>2</sub> are characterized by graphitic carbon. |
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| institution | Directory Open Access Journal |
| issn | 2073-4344 |
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| last_indexed | 2024-03-10T18:25:58Z |
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| spelling | doaj.art-958d44fa592d4c15b76ea305a96a24dd2023-11-20T07:00:40ZengMDPI AGCatalysts2073-43442020-07-0110779310.3390/catal10070793H<sub>2</sub> Production from Catalytic Methane Decomposition Using Fe/x-ZrO<sub>2</sub> and Fe-Ni/(x-ZrO<sub>2</sub>) (x = 0, La<sub>2</sub>O<sub>3</sub>, WO<sub>3</sub>) CatalystsFahad Al-Mubaddel0Samsudeen Kasim1Ahmed A. Ibrahim2Abdulrhman S. Al-Awadi3Anis H. Fakeeha4Ahmed S. Al-Fatesh5Chemical Engineering Department, College of Engineering, King Saud University, P.O. Box 800, Riyadh 11421, Saudi ArabiaChemical Engineering Department, College of Engineering, King Saud University, P.O. Box 800, Riyadh 11421, Saudi ArabiaChemical Engineering Department, College of Engineering, King Saud University, P.O. Box 800, Riyadh 11421, Saudi ArabiaChemical Engineering Department, College of Engineering, King Saud University, P.O. Box 800, Riyadh 11421, Saudi ArabiaChemical Engineering Department, College of Engineering, King Saud University, P.O. Box 800, Riyadh 11421, Saudi ArabiaChemical Engineering Department, College of Engineering, King Saud University, P.O. Box 800, Riyadh 11421, Saudi ArabiaAn environmentally-benign way of producing hydrogen is methane decomposition. This study focused on methane decomposition using Fe and Fe-Ni catalysts, which were dispersed over different supports by the wet-impregnation method. We observed the effect of modifying ZrO<sub>2</sub> with La<sub>2</sub>O<sub>3</sub> and WO<sub>3</sub> in terms of H<sub>2</sub> yield and carbon deposits. The modification led to a higher H<sub>2</sub> yield in all cases and WO<sub>3</sub>-modified support gave the highest yield of about 90% and was stable throughout the reaction period. The reaction conditions were at 1 atm, 800 °C, and 4000 mL(hg<sub>cat</sub>)<sup>−1</sup> space velocity. Adding Ni to Fe/x-ZrO<sub>2</sub> gave a higher H<sub>2</sub> yield and stability for ZrO<sub>2</sub> and La<sub>2</sub>O<sub>3</sub> + ZrO<sub>2</sub>-supported catalysts whose prior performances and stabilities were very poor. Catalyst samples were analyzed by characterization techniques like X-ray diffraction (XRD), nitrogen physisorption, temperature-programmed reduction (TPR), thermo-gravimetric analysis (TGA), and Raman spectroscopy. The phases of iron and the supports were identified using XRD while the BET revealed a significant decrease in the specific surface areas of fresh catalysts relative to supports. A progressive change in Fe’s oxidation state from Fe<sup>3+</sup> to Fe<sup>0</sup> was observed from the H<sub>2</sub>-TPR results. The carbon deposits on Fe/ZrO<sub>2</sub> and Fe/La<sub>2</sub>O<sub>3</sub> + ZrO<sub>2</sub> are mainly amorphous, while Fe/WO<sub>3</sub> + ZrO<sub>2</sub> and Fe-Ni/x-ZrO<sub>2</sub> are characterized by graphitic carbon.https://www.mdpi.com/2073-4344/10/7/793methane decompositionhydrogen productionacidityspectradiffractogramgraphitization |
| spellingShingle | Fahad Al-Mubaddel Samsudeen Kasim Ahmed A. Ibrahim Abdulrhman S. Al-Awadi Anis H. Fakeeha Ahmed S. Al-Fatesh H<sub>2</sub> Production from Catalytic Methane Decomposition Using Fe/x-ZrO<sub>2</sub> and Fe-Ni/(x-ZrO<sub>2</sub>) (x = 0, La<sub>2</sub>O<sub>3</sub>, WO<sub>3</sub>) Catalysts Catalysts methane decomposition hydrogen production acidity spectra diffractogram graphitization |
| title | H<sub>2</sub> Production from Catalytic Methane Decomposition Using Fe/x-ZrO<sub>2</sub> and Fe-Ni/(x-ZrO<sub>2</sub>) (x = 0, La<sub>2</sub>O<sub>3</sub>, WO<sub>3</sub>) Catalysts |
| title_full | H<sub>2</sub> Production from Catalytic Methane Decomposition Using Fe/x-ZrO<sub>2</sub> and Fe-Ni/(x-ZrO<sub>2</sub>) (x = 0, La<sub>2</sub>O<sub>3</sub>, WO<sub>3</sub>) Catalysts |
| title_fullStr | H<sub>2</sub> Production from Catalytic Methane Decomposition Using Fe/x-ZrO<sub>2</sub> and Fe-Ni/(x-ZrO<sub>2</sub>) (x = 0, La<sub>2</sub>O<sub>3</sub>, WO<sub>3</sub>) Catalysts |
| title_full_unstemmed | H<sub>2</sub> Production from Catalytic Methane Decomposition Using Fe/x-ZrO<sub>2</sub> and Fe-Ni/(x-ZrO<sub>2</sub>) (x = 0, La<sub>2</sub>O<sub>3</sub>, WO<sub>3</sub>) Catalysts |
| title_short | H<sub>2</sub> Production from Catalytic Methane Decomposition Using Fe/x-ZrO<sub>2</sub> and Fe-Ni/(x-ZrO<sub>2</sub>) (x = 0, La<sub>2</sub>O<sub>3</sub>, WO<sub>3</sub>) Catalysts |
| title_sort | h sub 2 sub production from catalytic methane decomposition using fe x zro sub 2 sub and fe ni x zro sub 2 sub x 0 la sub 2 sub o sub 3 sub wo sub 3 sub catalysts |
| topic | methane decomposition hydrogen production acidity spectra diffractogram graphitization |
| url | https://www.mdpi.com/2073-4344/10/7/793 |
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