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Ceria promoted phosphate-zirconia supported nickel catalyst (10Ni1Ce/PZr; x = 0, 1, 1.5, 2, 2.5, 3, 5 wt%) are prepared and characterized by XRD, SEM, SEM-EDX, CH4-TPSR, NH3-TPD, cyclic H2TPR-CO2TPD-H2TPR, and TPH. Ceria addition induces surface reducibility, exposes reduced phases of NiO and Ni2P2O7 as CH4 decomposition sites, and persuades additional CO2 adsorbed species as formate species over the catalyst surface. It also switches mobile oxygen in the lattice and thereafter oxide vacancy is replenished by oxygen from CO2 to a great extent. Altogether, 1 wt% ceria loading (10Ni1Ce/PZr) ensures more than 90% H2 yield (H2/CO = 0.96) whereas 2 wt% ceria loading inputs constancy in catalytic performance up to 440 min TOS. Up to 3 wt% ceria loading, 97% hydrogen yield (H2/CO ~1) is observed. Catalytic performance deteriorated above that 3 wt% ceria loading due to shading the catalytic active site or reoxidation of metallic nickel by excess ceria.
Jyoti Khatri; Anis Hamza Fakeeha; Samsudeen Olajide Kasim; Mahmud S. Lanre; Ahmed E. Abasaeed; Ahmed Aidid Ibrahim; Rawesh Kumar; Ahmed Sadeq Al‐Fatesh. Ceria promoted phosphate‐zirconia supported Ni catalyst for hydrogen rich syngas production through dry reforming of methane. International Journal of Energy Research 2021, 1 .
AMA StyleJyoti Khatri, Anis Hamza Fakeeha, Samsudeen Olajide Kasim, Mahmud S. Lanre, Ahmed E. Abasaeed, Ahmed Aidid Ibrahim, Rawesh Kumar, Ahmed Sadeq Al‐Fatesh. Ceria promoted phosphate‐zirconia supported Ni catalyst for hydrogen rich syngas production through dry reforming of methane. International Journal of Energy Research. 2021; ():1.
Chicago/Turabian StyleJyoti Khatri; Anis Hamza Fakeeha; Samsudeen Olajide Kasim; Mahmud S. Lanre; Ahmed E. Abasaeed; Ahmed Aidid Ibrahim; Rawesh Kumar; Ahmed Sadeq Al‐Fatesh. 2021. "Ceria promoted phosphate‐zirconia supported Ni catalyst for hydrogen rich syngas production through dry reforming of methane." International Journal of Energy Research , no. : 1.
Hydrogen production through CH4 and CO2 over nickel based supported catalyst system is not only a catalytic achievement but also a step towards fulfilling environmental goals of reducing global warming. Yttria is known for its stabilization of ZrO2 as well as involvement of O2− species in lattice. Herein, yttria-zirconia supported Ni catalyst system is utilized for hydrogen production through dry reforming of methane. It is characterized thoroughly by x-ray diffraction, infrared spectroscopy, ultraviolet spectroscopy and x-ray photoelectron microscopy. The spent catalysts are also characterized by temperature-programmed oxidation (TPO) and X-ray photoelectron microscopy. Ni-15Y-ZrO2 is quite thermally stable and it has a wide range of basic sites for CO2 adsorption and highest density of O2− species/lattice oxygen for carbon deposit oxidation. It gives the highest H2 yield (67.5%) that drops slowly to 63.7% during 420 min. Ni-20Y-ZrO2 catalyst activity is more or less same until 210 min. At high reaction temperature 800 °C, Ni-20Y-ZrO2 also shows a slow rise of H2 yield (69%) but Ni-15Y-ZrO2 shows a steep rise in H2 yield (78%).
Rutu Patel; Anis H. Fakeeha; Samsudeen O. Kasim; Mahmud L. Sofiu; Ahmed A. Ibrahim; Ahmed E. Abasaeed; Rawesh Kumar; Ahmed S. Al-Fatesh. Optimizing yttria-zirconia proportions in Ni supported catalyst system for H2 production through dry reforming of methane. Molecular Catalysis 2021, 510, 111676 .
AMA StyleRutu Patel, Anis H. Fakeeha, Samsudeen O. Kasim, Mahmud L. Sofiu, Ahmed A. Ibrahim, Ahmed E. Abasaeed, Rawesh Kumar, Ahmed S. Al-Fatesh. Optimizing yttria-zirconia proportions in Ni supported catalyst system for H2 production through dry reforming of methane. Molecular Catalysis. 2021; 510 ():111676.
Chicago/Turabian StyleRutu Patel; Anis H. Fakeeha; Samsudeen O. Kasim; Mahmud L. Sofiu; Ahmed A. Ibrahim; Ahmed E. Abasaeed; Rawesh Kumar; Ahmed S. Al-Fatesh. 2021. "Optimizing yttria-zirconia proportions in Ni supported catalyst system for H2 production through dry reforming of methane." Molecular Catalysis 510, no. : 111676.
ZrO2 supported Nickel catalyst, 9 wt%WO3 -91 wt%ZrO2 supported Nickel catalyst and ceria promoted 9 wt%WO3-91 wt%ZrO2 supported Nickel catalyst (5NixCe/WZr catalyst) is synthesized via wet impregnation and characterized by XRD, UV–vis, CO2 -TPD, H2 TPR-CO2 TPD-H2 TPR cycle, TPH, TPH followed by O2 -TPO and CO2 -TPD followed by O2 -TPO. Due to limitation in surface re-oxidizing capability and shading of catalytic active sites by thermally stable carbonates; catalytic activity of unpromoted catalyst system is less. 5NixCe/WZr catalyst has extended CH4 decomposition sites, additional basic sites (during the reaction) for CO2 adsorption and excellent redox accompany (Ce +4/Ce +3, W+6/W +4) for carbon oxidation and re-oxidizing capability of surface up to the pristine level. 2.5 wt% Ceria promotional addition is resulted into 78% H2 yield constantly up to 420 min TOS. The carbon deposit over ceria promoted system (up to 2.5 wt%) is amorphous type, more easily/moderately reducible, oxidizable and removable.
Rutu Patel; Ahmed S. Al-Fatesh; Anis H. Fakeeha; Yasir Arafat; Samsudeen O. Kasim; Ahmed A. Ibrahim; Salma A. Al-Zahrani; Ahmed E. Abasaeed; Vijay Kumar Srivastava; Rawesh Kumar. Impact of ceria over WO3–ZrO2 supported Ni catalyst towards hydrogen production through dry reforming of methane. International Journal of Hydrogen Energy 2021, 46, 25015 -25028.
AMA StyleRutu Patel, Ahmed S. Al-Fatesh, Anis H. Fakeeha, Yasir Arafat, Samsudeen O. Kasim, Ahmed A. Ibrahim, Salma A. Al-Zahrani, Ahmed E. Abasaeed, Vijay Kumar Srivastava, Rawesh Kumar. Impact of ceria over WO3–ZrO2 supported Ni catalyst towards hydrogen production through dry reforming of methane. International Journal of Hydrogen Energy. 2021; 46 (49):25015-25028.
Chicago/Turabian StyleRutu Patel; Ahmed S. Al-Fatesh; Anis H. Fakeeha; Yasir Arafat; Samsudeen O. Kasim; Ahmed A. Ibrahim; Salma A. Al-Zahrani; Ahmed E. Abasaeed; Vijay Kumar Srivastava; Rawesh Kumar. 2021. "Impact of ceria over WO3–ZrO2 supported Ni catalyst towards hydrogen production through dry reforming of methane." International Journal of Hydrogen Energy 46, no. 49: 25015-25028.
Development of a transition metal based catalyst aiming at concomitant high activity and stability attributed to distinguished catalytic characteristics is considered as the bottleneck for dry reforming of methane (DRM). This work highlights the role of modifying zirconia (ZrO2) and alumina (Al2O3) supported nickel based catalysts using lanthanum oxide (La2O3) varying from 0 to 20 wt% during dry reforming of methane. The mesoporous catalysts with improved BET surface areas, improved dispersion, relatively lower reduction temperatures and enhanced surface basicity are identified after La2O3 doping. These factors have influenced the catalytic activity and higher hydrogen yields are found for La2O3 modified catalysts as compared to base catalysts (5 wt% Ni-ZrO2 and 5 wt% Ni-Al2O3). Post-reaction characterizations such as TGA have showed less coke formation over La2O3 modified samples. Raman spectra indicates decreased graphitization for La2O3 catalysts. The 5Ni-10La2O3-ZrO2 catalyst produced 80% hydrogen yields, 25% more than that of 5Ni-ZrO2. 5Ni-15La2O3-Al2O3 gave 84% hydrogen yields, 8% higher than that of 5Ni-Al2O3. Higher CO2 activity improved the surface carbon oxidation rate. From the study, the extent of La2O3 loading is dependent on the type of oxide support.
Ahmed Abasaeed; Samsudeen Kasim; Wasim Khan; Mahmud Sofiu; Ahmed Ibrahim; Anis Fakeeha; Ahmed Al-Fatesh. Hydrogen Yield from CO2 Reforming of Methane: Impact of La2O3 Doping on Supported Ni Catalysts. Energies 2021, 14, 2412 .
AMA StyleAhmed Abasaeed, Samsudeen Kasim, Wasim Khan, Mahmud Sofiu, Ahmed Ibrahim, Anis Fakeeha, Ahmed Al-Fatesh. Hydrogen Yield from CO2 Reforming of Methane: Impact of La2O3 Doping on Supported Ni Catalysts. Energies. 2021; 14 (9):2412.
Chicago/Turabian StyleAhmed Abasaeed; Samsudeen Kasim; Wasim Khan; Mahmud Sofiu; Ahmed Ibrahim; Anis Fakeeha; Ahmed Al-Fatesh. 2021. "Hydrogen Yield from CO2 Reforming of Methane: Impact of La2O3 Doping on Supported Ni Catalysts." Energies 14, no. 9: 2412.
Hydrogen production from dry reforming of methane (DRM) over chief Ni-based catalyst is cutting edge research area due to environmental consciousness about reducing global warming gases (CH4 and CO2) and greener route of synthesis. Herein, ceria promoted lanthanum-zirconia supported Ni catalyst system (5NixCe/LaZr; x = 0, 1, 1.5, 2, 2.5, 3, 5 wt.%) is prepared by the wet impregnation method. It is further characterized using X-ray diffraction, infrared spectroscopy, ultraviolet spectroscopy, temperature-programmed and cyclic temperature-programmed experiments. 2.5 wt.% ceria promoted lanthana-zirconia supported Ni catalyst (5Ni2.5Ce/LaZr) has thermally stabilized the support, wide Ni-LaZr interface for CH4 decomposition, wide basic surfaces (La2O3-ZrO2) for CO2 interaction, CO2 coordinated La+3 sites (as La2O2CO3 species), low band gap and oxygen vacancy carrying mobile oxygen (which is replenished by CO2). Altogether, it produces more than 87 % hydrogen yield. This thorough study and fine correlation will help design industrially suitable catalyst for hydrogen production through DRM.
Jyoti Khatri; Ahmed S. Al-Fatesh; Anis H. Fakeeha; Ahmed A. Ibrahim; Ahmed E. Abasaeed; Samsudeen O. Kasim; Ahmed I. Osman; Rutu Patel; Rawesh Kumar. Ce promoted lanthana-zirconia supported Ni catalyst system: A ternary redox system for hydrogen production. Molecular Catalysis 2021, 504, 111498 .
AMA StyleJyoti Khatri, Ahmed S. Al-Fatesh, Anis H. Fakeeha, Ahmed A. Ibrahim, Ahmed E. Abasaeed, Samsudeen O. Kasim, Ahmed I. Osman, Rutu Patel, Rawesh Kumar. Ce promoted lanthana-zirconia supported Ni catalyst system: A ternary redox system for hydrogen production. Molecular Catalysis. 2021; 504 ():111498.
Chicago/Turabian StyleJyoti Khatri; Ahmed S. Al-Fatesh; Anis H. Fakeeha; Ahmed A. Ibrahim; Ahmed E. Abasaeed; Samsudeen O. Kasim; Ahmed I. Osman; Rutu Patel; Rawesh Kumar. 2021. "Ce promoted lanthana-zirconia supported Ni catalyst system: A ternary redox system for hydrogen production." Molecular Catalysis 504, no. : 111498.
The increasing alarm of global warming always draws interest in reactions like dry reforming of methane (DRM) where both global warming gases (CO2 and CH4) are converted into value-added chemical building blocks, such as syngas. Nickel catalyst active sites along with support acid-base profiles play a key role in DRM. Herein, xLa2O3+(100-x) Al2O3 (x = 0, 10, 15, 20%) supports are prepared and followed by NiO dispersion over the produced support by impregnation method. It was tested for DRM reaction and characterized with TGA, XRD, TEM, IR, Surface area and porosity measurement, H2-TPR, CO2-TPD and NH3-TPD techniques. Upon increasing the basic lanthana proportion in the acidic alumina support, the crystallinity of alumina and acidity of total support decline. Up to 15% Lanthana addition in support claims a low acid and rich basic surface including super basic sites (related to unidentate carbonates) which governed optimum catalytic performance 64% CH4 conversion, 79% CO2 conversion and H2/CO ~ 1 up to 460-min in time on stream test. 20% lanthanum oxide loading led to inferior performance due to rapid loss of surface area, pore-volume, pore diameter, acidity and medium basic strength sites. Fine-tuning of acid-base lanthana-alumina support with dispersed Ni species are a means for understanding DRM.
Fahad S. Al-Mubaddel; Rawesh Kumar; Mahmud Lanre Sofiu; Francesco Frusteri; Ahmed Aidid Ibrahim; Vijay Kumar Srivastava; Samsudeen Olajide Kasim; Anis Hamza Fakeeha; Ahmed Elhag Abasaeed; Ahmed I. Osman; Ahmed Sadeq Al-Fatesh. Optimizing acido-basic profile of support in Ni supported La2O3+Al2O3 catalyst for dry reforming of methane. International Journal of Hydrogen Energy 2021, 46, 14225 -14235.
AMA StyleFahad S. Al-Mubaddel, Rawesh Kumar, Mahmud Lanre Sofiu, Francesco Frusteri, Ahmed Aidid Ibrahim, Vijay Kumar Srivastava, Samsudeen Olajide Kasim, Anis Hamza Fakeeha, Ahmed Elhag Abasaeed, Ahmed I. Osman, Ahmed Sadeq Al-Fatesh. Optimizing acido-basic profile of support in Ni supported La2O3+Al2O3 catalyst for dry reforming of methane. International Journal of Hydrogen Energy. 2021; 46 (27):14225-14235.
Chicago/Turabian StyleFahad S. Al-Mubaddel; Rawesh Kumar; Mahmud Lanre Sofiu; Francesco Frusteri; Ahmed Aidid Ibrahim; Vijay Kumar Srivastava; Samsudeen Olajide Kasim; Anis Hamza Fakeeha; Ahmed Elhag Abasaeed; Ahmed I. Osman; Ahmed Sadeq Al-Fatesh. 2021. "Optimizing acido-basic profile of support in Ni supported La2O3+Al2O3 catalyst for dry reforming of methane." International Journal of Hydrogen Energy 46, no. 27: 14225-14235.
H2 production through dry reforming of methane (DRM) is a hot topic amidst growing environmental and atom-economy concerns. Loading Ni-based reducible mixed oxide systems onto a thermally stable support is a reliable approach for obtaining catalysts of good dispersion and high stability. Herein, NiO was dispersed over MOx-modified-γ-Al2O3 (M = Ti, Mo, Si, or W; x = 2 or 3) through incipient wetness impregnation followed by calcination. The obtained catalyst systems were characterized by infrared, ultraviolet–visible, and X-ray photoelectron spectroscopies, and H2 temperature-programmed reduction. The mentioned synthetic procedure afforded the proper nucleation of different NiO-containing mixed oxides and/or interacting-NiO species. With different modifiers, the interaction of NiO with the γ-Al2O3 support was found to change, the Ni2+ environment was reformed exclusively, and the tendency of NiO species to undergo reduction was modified greatly. Catalyst systems 5Ni3MAl (M = Si, W) comprised a variety of species, whereby NiO interacted with the modifier and the support (e.g., NiSiO3, NiAl2O4, and NiWO3). These two catalyst systems displayed equal efficiency, >70% H2 yield at 800 °C, and were thermally stable for up to 420 min on stream. 5Ni3SiAl catalyst regained nearly all its activity during regeneration for up to two cycles.
Ahmed Sadeq Al-Fatesh; Mayankkumar Lakshmanbhai Chaudhary; Anis Hamza Fakeeha; Ahmed Aidid Ibrahim; Fahad Al-Mubaddel; Samsudeen Olajide Kasim; Yousef Abdulrahman Albaqmaa; Abdulaziz A. Bagabas; Rutu Patel; Rawesh Kumar. Role of Mixed Oxides in Hydrogen Production through the Dry Reforming of Methane over Nickel Catalysts Supported on Modified γ-Al2O3. Processes 2021, 9, 157 .
AMA StyleAhmed Sadeq Al-Fatesh, Mayankkumar Lakshmanbhai Chaudhary, Anis Hamza Fakeeha, Ahmed Aidid Ibrahim, Fahad Al-Mubaddel, Samsudeen Olajide Kasim, Yousef Abdulrahman Albaqmaa, Abdulaziz A. Bagabas, Rutu Patel, Rawesh Kumar. Role of Mixed Oxides in Hydrogen Production through the Dry Reforming of Methane over Nickel Catalysts Supported on Modified γ-Al2O3. Processes. 2021; 9 (1):157.
Chicago/Turabian StyleAhmed Sadeq Al-Fatesh; Mayankkumar Lakshmanbhai Chaudhary; Anis Hamza Fakeeha; Ahmed Aidid Ibrahim; Fahad Al-Mubaddel; Samsudeen Olajide Kasim; Yousef Abdulrahman Albaqmaa; Abdulaziz A. Bagabas; Rutu Patel; Rawesh Kumar. 2021. "Role of Mixed Oxides in Hydrogen Production through the Dry Reforming of Methane over Nickel Catalysts Supported on Modified γ-Al2O3." Processes 9, no. 1: 157.
Nickel catalysts supported on zirconium oxide and modified by various amounts of lanthanum with 10, 15, and 20 wt.% were synthesized for CO2 reforming of methane. The effect of La2O3 as a promoter on the stability of the catalyst, the amount of carbon formed, and the ratio of H2 to CO were investigated. In this study, we observed that promoting the catalyst with La2O3 enhanced catalyst activities. The conversions of the feed, i.e., methane and carbon dioxide, were in the order 10La2O3 > 15La2O3 > 20La2O3 > 0La2O3, with the highest conversions being about 60% and 70% for both CH4 and CO2 respectively. Brunauer–Emmett–Teller (BET) analysis showed that the surface area of the catalysts decreased slightly with increasing La2O3 doping. We observed that 10% La2O3 doping had the highest specific surface area (21.6 m2/g) and the least for the un-promoted sample. The higher surface areas of the promoted samples relative to the reference catalyst is an indication of the concentration of the metals at the mouths of the pores of the support. XRD analysis identified the different phases available, which ranged from NiO species to the monoclinic and tetragonal phases of ZrO2. Temperature programmed reduction (TPR) analysis showed that the addition of La2O3 lowered the activation temperature needed for the promoted catalysts. The structural changes in the morphology of the fresh catalyst were revealed by microscopic analysis. The elemental compositions of the catalyst, synthesized through energy dispersive X-ray analysis, were virtually the same as the calculated amount used for the synthesis. The thermogravimetric analysis (TGA) of spent catalysts showed that the La2O3 loading of 10 wt.% contributed to the gasification of carbon deposits and hence gave about 1% weight-loss after a reaction time of 7.5 h at 700 °C.
Mahmud S. Lanre; Ahmed S. Al-Fatesh; Anis H. Fakeeha; Samsudeen O. Kasim; Ahmed A. Ibrahim; Abdulrahman S. Al-Awadi; Attiyah A. Al-Zahrani; Ahmed E. Abasaeed. Catalytic Performance of Lanthanum Promoted Ni/ZrO2 for Carbon Dioxide Reforming of Methane. Processes 2020, 8, 1502 .
AMA StyleMahmud S. Lanre, Ahmed S. Al-Fatesh, Anis H. Fakeeha, Samsudeen O. Kasim, Ahmed A. Ibrahim, Abdulrahman S. Al-Awadi, Attiyah A. Al-Zahrani, Ahmed E. Abasaeed. Catalytic Performance of Lanthanum Promoted Ni/ZrO2 for Carbon Dioxide Reforming of Methane. Processes. 2020; 8 (11):1502.
Chicago/Turabian StyleMahmud S. Lanre; Ahmed S. Al-Fatesh; Anis H. Fakeeha; Samsudeen O. Kasim; Ahmed A. Ibrahim; Abdulrahman S. Al-Awadi; Attiyah A. Al-Zahrani; Ahmed E. Abasaeed. 2020. "Catalytic Performance of Lanthanum Promoted Ni/ZrO2 for Carbon Dioxide Reforming of Methane." Processes 8, no. 11: 1502.
This paper investigated the effect of doping Ni supported catalysts with different ceria loading. The catalysts (5%Ni+x%Ce/La2O3+ZrO2, where x = 0, 1, 2, 2.5, 3, 5) were synthesized via the wet impregnation technique and tested for methane reforming with carbon dioxide at atmospheric pressure, 700 °C and 42, 000 ml/gcat.h gas hourly space velocity. The fresh catalysts were subjected to different characterization techniques such as X-ray diffraction, Surface area and pore analysis, H2-temperature programmed reduction, CO2-temperature programmed desorption and thermogravimetric analysis (TGA). A fine correlation between characterization results and catalytic activity is found. The results of the reactions indicated that 5%Ni/La2O3+ZrO2 has the lowest conversion which increased with the percentage loading of CeO2 up to 2.5 wt % and then began to decline. This suggests that 2.5 wt % loading is the optimum for CH4 and CO2 conversion. This particular catalyst composition has NiO species that could be reduced easily, as well as dense and wide distribution of all type of basic sites with respect to other catalyst system. The used catalysts were again subjected to TGA and RAMAN analysis where the least carbon deposition and the least deactivation factor was observed for 5%Ni+5%Ce/La2O3+ZrO2 catalysts.
Samsudeen Olajide Kasim; Ahmed Sadeq Al-Fatesh; Ahmed Aidid Ibrahim; Rawesh Kumar; Ahmed Elhag Abasaeed; Anis Hamza Fakeeha. Impact of Ce-Loading on Ni-catalyst supported over La2O3+ZrO2 in methane reforming with CO2. International Journal of Hydrogen Energy 2020, 45, 33343 -33351.
AMA StyleSamsudeen Olajide Kasim, Ahmed Sadeq Al-Fatesh, Ahmed Aidid Ibrahim, Rawesh Kumar, Ahmed Elhag Abasaeed, Anis Hamza Fakeeha. Impact of Ce-Loading on Ni-catalyst supported over La2O3+ZrO2 in methane reforming with CO2. International Journal of Hydrogen Energy. 2020; 45 (58):33343-33351.
Chicago/Turabian StyleSamsudeen Olajide Kasim; Ahmed Sadeq Al-Fatesh; Ahmed Aidid Ibrahim; Rawesh Kumar; Ahmed Elhag Abasaeed; Anis Hamza Fakeeha. 2020. "Impact of Ce-Loading on Ni-catalyst supported over La2O3+ZrO2 in methane reforming with CO2." International Journal of Hydrogen Energy 45, no. 58: 33343-33351.
Catalysts of 10% Ni, supported on promoted alumina, were used to accomplish the partial oxidation of methane. The alumina support was doped with oxides of Mo, Mg, Ti and Y. An incipient wetness impregnation technique was used to synthesize the catalysts. The physicochemical properties of the catalysts were described by XRD, H2-TPR (temperature programmed reduction), BET, TGA, CO2-TPD (temperature-programmed desorption) and Raman. The characterization results denoted that Ni has a strong interaction with the support. The TGA investigation of spent catalysts displayed the anticoking enhancement of the promoters. The impact of the support promoters on the catalyst stability, methane conversion and H2 yield was inspected. Stability tests were done for 460 min. The H2 yields were 76 and 60% and the CH4 conversions were 67 and 92%, respectively, over Ni/Al2O3+Mg, when the reaction temperatures were 550 and 650 °C, respectively. The performance of the present work was compared to relevant findings in the literature.
Ahmed A. Ibrahim; Wasim U. Khan; Fahad Al-Mubaddel; Ahmed S. Al-Fatesh; Samsudeen O. Kasim; Sofiu L. Mahmud; Ateyah A. Al-Zahrani; M. Rafiq H. Siddiqui; Anis H. Fakeeha. Study of Partial Oxidation of Methane by Ni/Al2O3 Catalyst: Effect of Support Oxides of Mg, Mo, Ti and Y as Promoters. Molecules 2020, 25, 5029 .
AMA StyleAhmed A. Ibrahim, Wasim U. Khan, Fahad Al-Mubaddel, Ahmed S. Al-Fatesh, Samsudeen O. Kasim, Sofiu L. Mahmud, Ateyah A. Al-Zahrani, M. Rafiq H. Siddiqui, Anis H. Fakeeha. Study of Partial Oxidation of Methane by Ni/Al2O3 Catalyst: Effect of Support Oxides of Mg, Mo, Ti and Y as Promoters. Molecules. 2020; 25 (21):5029.
Chicago/Turabian StyleAhmed A. Ibrahim; Wasim U. Khan; Fahad Al-Mubaddel; Ahmed S. Al-Fatesh; Samsudeen O. Kasim; Sofiu L. Mahmud; Ateyah A. Al-Zahrani; M. Rafiq H. Siddiqui; Anis H. Fakeeha. 2020. "Study of Partial Oxidation of Methane by Ni/Al2O3 Catalyst: Effect of Support Oxides of Mg, Mo, Ti and Y as Promoters." Molecules 25, no. 21: 5029.
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 ZrO2 with La2O3 and WO3 in terms of H2 yield and carbon deposits. The modification led to a higher H2 yield in all cases and WO3-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(hgcat)−1 space velocity. Adding Ni to Fe/x-ZrO2 gave a higher H2 yield and stability for ZrO2 and La2O3 + ZrO2-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 Fe3+ to Fe0 was observed from the H2-TPR results. The carbon deposits on Fe/ZrO2 and Fe/La2O3 + ZrO2 are mainly amorphous, while Fe/WO3 + ZrO2 and Fe-Ni/x-ZrO2 are characterized by graphitic carbon.
Fahad Al-Mubaddel; Samsudeen Kasim; Ahmed A. Ibrahim; Abdulrhman S. Al-Awadi; Anis H. Fakeeha; Ahmed S. Al-Fatesh. H2 Production from Catalytic Methane Decomposition Using Fe/x-ZrO2 and Fe-Ni/(x-ZrO2) (x = 0, La2O3, WO3) Catalysts. Catalysts 2020, 10, 793 .
AMA StyleFahad Al-Mubaddel, Samsudeen Kasim, Ahmed A. Ibrahim, Abdulrhman S. Al-Awadi, Anis H. Fakeeha, Ahmed S. Al-Fatesh. H2 Production from Catalytic Methane Decomposition Using Fe/x-ZrO2 and Fe-Ni/(x-ZrO2) (x = 0, La2O3, WO3) Catalysts. Catalysts. 2020; 10 (7):793.
Chicago/Turabian StyleFahad Al-Mubaddel; Samsudeen Kasim; Ahmed A. Ibrahim; Abdulrhman S. Al-Awadi; Anis H. Fakeeha; Ahmed S. Al-Fatesh. 2020. "H2 Production from Catalytic Methane Decomposition Using Fe/x-ZrO2 and Fe-Ni/(x-ZrO2) (x = 0, La2O3, WO3) Catalysts." Catalysts 10, no. 7: 793.
Dry reforming of CH4 was conducted over promoted Ni catalysts, supported on mesoporous gamma-alumina. The Ni catalysts were promoted by various metal oxides (CuO, ZnO, Ga2O3, or Gd2O3) and were synthesized by the incipient wetness impregnation method. The influence of the promoters on the catalyst stability, coke deposition, and H2/CO mole ratio was investigated. Stability tests were carried out for 460 min. The H2 yield was 87% over 5Ni+1Gd/Al, while the CH4 and CO2 conversions were found to decrease in the following order: 5Ni+1Gd/Al > 5Ni+1Ga/Al > 5Ni+1Zn/Al > 5Ni/Al > 5Ni+1Cu/Al. The high catalytic performance of 5Ni+1Gd/Al, 5Ni+1Ga/Al, and 5Ni+1Zn/Al was found to be closely related to their contents of NiO species, which interacted moderately and strongly with the support, whereas free NiO in 5Ni+1Cu/Al made it catalytically inactive, even than 5Ni/Al. The 5Ni+1Gd/Al catalyst showed the highest CH4 conversion of 83% with H2/CO mole ratio of ~1.0.
Anis H. Fakeeha; Abdulaziz A. Bagabas; Mahmud S. Lanre; Ahmed Osman; Samsudeen O. Kasim; Ahmed A. Ibrahim; Rasheed Arasheed; Abdulmajeed Alkhalifa; Ahmed Y. Elnour; Ahmed E. Abasaeed; Ahmed S. Al-Fatesh. Catalytic Performance of Metal Oxides Promoted Nickel Catalysts Supported on Mesoporous γ-Alumina in Dry Reforming of Methane. Processes 2020, 8, 522 .
AMA StyleAnis H. Fakeeha, Abdulaziz A. Bagabas, Mahmud S. Lanre, Ahmed Osman, Samsudeen O. Kasim, Ahmed A. Ibrahim, Rasheed Arasheed, Abdulmajeed Alkhalifa, Ahmed Y. Elnour, Ahmed E. Abasaeed, Ahmed S. Al-Fatesh. Catalytic Performance of Metal Oxides Promoted Nickel Catalysts Supported on Mesoporous γ-Alumina in Dry Reforming of Methane. Processes. 2020; 8 (5):522.
Chicago/Turabian StyleAnis H. Fakeeha; Abdulaziz A. Bagabas; Mahmud S. Lanre; Ahmed Osman; Samsudeen O. Kasim; Ahmed A. Ibrahim; Rasheed Arasheed; Abdulmajeed Alkhalifa; Ahmed Y. Elnour; Ahmed E. Abasaeed; Ahmed S. Al-Fatesh. 2020. "Catalytic Performance of Metal Oxides Promoted Nickel Catalysts Supported on Mesoporous γ-Alumina in Dry Reforming of Methane." Processes 8, no. 5: 522.
The catalytic activity of the partial oxidation reforming reaction for hydrogen production over 10% Ni supported on high and low surface area alumina and zirconia was investigated. The reforming reactions, under atmospheric pressure, were performed with a feed molar ratio of CH4/O2 = 2.0. The reaction temperature was set to 450–650 °C. The catalytic activity, stability, and carbon formation were determined via TGA, TPO, Raman, and H2 yield. The catalysts were calcined at 600 and 800 °C. The catalysts were prepared via the wet-impregnation method. Various characterizations were conducted using BET, XRD, TPR, TGA, TPD, TPO, and Raman. The highest methane conversion (90%) and hydrogen yield (72%) were obtained at a 650 °C reaction temperature using Ni-Al-H-600, which also showed the highest stability for the ranges of the reaction temperatures investigated. Indeed, the time-on-stream for 7 h of the Ni-Al-H-600 catalyst displayed high activity and a stable profile when the reaction temperature was set to 650 °C.
Anis Fakeeha; Ahmed A. Ibrahim; Hesham Aljuraywi; Yazeed Alqahtani; Ahmad Alkhodair; Suliman Alswaidan; Ahmed E. Abasaeed; Samsudeen O. Kasim; Sofiu Mahmud; Ahmed S. Al-Fatesh. Hydrogen Production by Partial Oxidation Reforming of Methane over Ni Catalysts Supported on High and Low Surface Area Alumina and Zirconia. Processes 2020, 8, 499 .
AMA StyleAnis Fakeeha, Ahmed A. Ibrahim, Hesham Aljuraywi, Yazeed Alqahtani, Ahmad Alkhodair, Suliman Alswaidan, Ahmed E. Abasaeed, Samsudeen O. Kasim, Sofiu Mahmud, Ahmed S. Al-Fatesh. Hydrogen Production by Partial Oxidation Reforming of Methane over Ni Catalysts Supported on High and Low Surface Area Alumina and Zirconia. Processes. 2020; 8 (5):499.
Chicago/Turabian StyleAnis Fakeeha; Ahmed A. Ibrahim; Hesham Aljuraywi; Yazeed Alqahtani; Ahmad Alkhodair; Suliman Alswaidan; Ahmed E. Abasaeed; Samsudeen O. Kasim; Sofiu Mahmud; Ahmed S. Al-Fatesh. 2020. "Hydrogen Production by Partial Oxidation Reforming of Methane over Ni Catalysts Supported on High and Low Surface Area Alumina and Zirconia." Processes 8, no. 5: 499.
In this paper, a comprehensive study was carried out on the application of perovskite catalyst in dry reforming of CH4. The perovskite catalyst was prepared using a sol–gel method. The prepared samples were characterized by N2 adsorption/desorption, TPR, XRD, CO2-TPD, TGA, TPO, Raman, and SEM techniques. In addition, the effect of operating pressure, namely, 1 bar, 3 bar, 5 bar, and 7 bar, temperature (500–800 °C) was evaluated. The characterization results indicated that catalysts operated at 1 bar, gas hourly space velocity of 84000 (mL/g/h) gave the best catalytic performance. CH4 and CO2 conversions of 77 and 80% were obtained at 1 bar and at 700 °C reaction temperature. The increase of reaction temperatures from 500 °C to 800 °C increased the reaction rate and hence the methane and carbon dioxide conversions were increased. A unity ratio of H2/CO was obtained at 1 bar for temperatures 600 °C and above. Similarly, the time on stream tests, obtained at a 700 °C reaction temperature, showed that the best ratio in terms of the closeness of unity and the stable profile could be attained when the pressure was set to 1 bar. The TGA analysis showed the drop of mass due to oxidation of carbon deposits, which started at 500 °C. The catalyst operated at 1 bar produced the least amount of carbon, equivalent to 35% weight loss, while the 3 and 5 bar operated catalysts generated carbon formation, equivalent to 65% weight loss. However, the 7 bar operated catalyst resulted the highest accumulation of carbon formation, equivalent to 83% weight reduction. Hence, the TGA profile indicated the relative carbon deposition on the catalyst, which was dependent of the operated pressure and hence confirmed the suitability operation pressure of 1 bar. The characterizations of the Raman, EDX, TGA, and TPO all presented the formation of carbon.
Anis Hamza Fakeeha; Ahmed Sadeq Al-Fatesh; Jehad K. Abu-Dahrieh; Ahmed Aidid Ibrahim; Samsudeen Olajide Kasim; Ahmed Elhag Abasaeed. Effect of Pressure on Na0.5La0.5Ni0.3Al0.7O2.5 Perovskite Catalyst for Dry Reforming of CH4. Catalysts 2020, 10, 379 .
AMA StyleAnis Hamza Fakeeha, Ahmed Sadeq Al-Fatesh, Jehad K. Abu-Dahrieh, Ahmed Aidid Ibrahim, Samsudeen Olajide Kasim, Ahmed Elhag Abasaeed. Effect of Pressure on Na0.5La0.5Ni0.3Al0.7O2.5 Perovskite Catalyst for Dry Reforming of CH4. Catalysts. 2020; 10 (4):379.
Chicago/Turabian StyleAnis Hamza Fakeeha; Ahmed Sadeq Al-Fatesh; Jehad K. Abu-Dahrieh; Ahmed Aidid Ibrahim; Samsudeen Olajide Kasim; Ahmed Elhag Abasaeed. 2020. "Effect of Pressure on Na0.5La0.5Ni0.3Al0.7O2.5 Perovskite Catalyst for Dry Reforming of CH4." Catalysts 10, no. 4: 379.
Dry reforming of methane (DRM) was studied in the light of Ni supported on 8%PO4 + ZrO2 catalysts. Cerium was used to modify the Ni active metal. Different percentage loadings of Ce (1%, 1.5%, 2%, 2.5%, 3%, and 5%) were tested. The wet incipient impregnation method was used for the preparation of all catalysts. The catalysts were activated at 700 °C for ½ h. The reactions were performed at 800 °C using a gas hourly space velocity of 28,000 mL (h·gcat)−1. X-ray diffraction (XRD), N2 physisorption, hydrogen temperature programmed reduction (H2-TPR), temperature programmed oxidation (TPO), temperature programmed desorption (TPD), and thermogravimetric analysis (TGA) were used for characterizing the catalysts. The TGA analysis depicted minor amounts of carbon deposition. The CO2-TPD results showed that Ce enhanced the basicity of the catalysts. The 3% Ce loading possessed the highest surface area, the largest pore volume, and the greatest pore diameter. All the promoted catalysts enhanced the conversions of CH4 and CO2. Among the promoted catalysts tested, the 10Ni + 3%Ce/8%PO4 + ZrO2 catalyst system operated at 1 bar and at 800 °C gave the highest conversions of CH4 (95%) and CO2 (96%). The stability profile of Cerium-modified catalysts (10%Ni/8%PO4 + ZrO2) depicted steady CH4 and CO2 conversions during the 7.5 h time on stream.
Ahmed A. Ibrahim; Ahmed S. Al-Fatesh; Nadavala Siva Kumar; Ahmed E. Abasaeed; Samsudeen O. Kasim; Anis H. Fakeeha. Dry Reforming of Methane Using Ce-modified Ni Supported on 8%PO4 + ZrO2 Catalysts. Catalysts 2020, 10, 242 .
AMA StyleAhmed A. Ibrahim, Ahmed S. Al-Fatesh, Nadavala Siva Kumar, Ahmed E. Abasaeed, Samsudeen O. Kasim, Anis H. Fakeeha. Dry Reforming of Methane Using Ce-modified Ni Supported on 8%PO4 + ZrO2 Catalysts. Catalysts. 2020; 10 (2):242.
Chicago/Turabian StyleAhmed A. Ibrahim; Ahmed S. Al-Fatesh; Nadavala Siva Kumar; Ahmed E. Abasaeed; Samsudeen O. Kasim; Anis H. Fakeeha. 2020. "Dry Reforming of Methane Using Ce-modified Ni Supported on 8%PO4 + ZrO2 Catalysts." Catalysts 10, no. 2: 242.
Ni based phosphate zirconium catalysts were prepared by impregnation technique and used under CH4 dry reforming conditions. Catalysts (x%Ni/8%PO4–Zr, where x = 5, 10, 15 or 20) were characterized by nitrogen physical adsorption-desorption, X-ray diffraction, temperature programmed reduction, CO2 and NH3 temperature programmed desorption, thermal gravimetric analysis and transmission electron microscopy (TEM-EDAX). Catalysts displayed a typical mesoporous structure and different reducibility grade as a function of Ni loading, diagnostic of a different extent of metal-support interaction. Activity and stability strongly depend upon Ni loading while the best performance was observed for catalyst characterized by a Ni loading of 10 wt%. The CO2-TPD profiles of spent catalysts indicated that such catalyst had more tendency to gasify coke formed over the catalyst surface. TGA analysis of used catalysts quantitatively showed that catalysts at higher Ni loading deactivated as result of huge graphitic carbon formation on catalyst surface. On the contrary, system 10%Ni8%PO4/ZrO2 turns out to be an excellent candidate to conduct the methane reforming reaction with CO2 without coke formation at high CH4 and CO2 conversions. Phosphate play a fundamental role in promoting Ni–ZrO2 interaction which reflects in the stabilization of catalytic system against metal sintering and coke formation.
Ahmed Aidid Ibrahim; Ahmed Sadeq Al-Fatesh; Wasim U. Khan; Samsudeen Olajide Kasim; Ahmed Elhag Abasaeed; Anis Hamza Fakeeha; Giuseppe Bonura; Francesco Frusteri. Enhanced coke suppression by using phosphate-zirconia supported nickel catalysts under dry methane reforming conditions. International Journal of Hydrogen Energy 2019, 44, 27784 -27794.
AMA StyleAhmed Aidid Ibrahim, Ahmed Sadeq Al-Fatesh, Wasim U. Khan, Samsudeen Olajide Kasim, Ahmed Elhag Abasaeed, Anis Hamza Fakeeha, Giuseppe Bonura, Francesco Frusteri. Enhanced coke suppression by using phosphate-zirconia supported nickel catalysts under dry methane reforming conditions. International Journal of Hydrogen Energy. 2019; 44 (51):27784-27794.
Chicago/Turabian StyleAhmed Aidid Ibrahim; Ahmed Sadeq Al-Fatesh; Wasim U. Khan; Samsudeen Olajide Kasim; Ahmed Elhag Abasaeed; Anis Hamza Fakeeha; Giuseppe Bonura; Francesco Frusteri. 2019. "Enhanced coke suppression by using phosphate-zirconia supported nickel catalysts under dry methane reforming conditions." International Journal of Hydrogen Energy 44, no. 51: 27784-27794.
Dry reforming of methane (DRM) for the production of synthesis gas (syngas: H2+CO) was performed over a series of nickel-based catalysts supported on γ-alumina promoted by B, Si, Ti, Zr, Mo and W. All catalysts were prepared by the wet incipient impregnation method and were characterized by X-ray diffraction (XRD), N2 physisorption, H2-TPR, CO2-TPD, XPS, SEM and TGA. Among different catalysts investigated, 5Ni3SiAl and 5Ni3WAl catalytic systems were found highly active with excellent coke resistance in DRM, as both catalyst systems showed >64% CH4 conversion, >70% CO2 conversion, and >0.90 mol H2/CO ratio over seven hours of reaction. The strong interaction between NiO and γ-alumina support in the presence of Si or W oxide modifier (in 5Ni3SiAl or 5Ni3WAl) was indicated as the main factor positively affecting both Ni dispersion and stability.
Ahmed Sadeq Al-Fatesh; Rawesh Kumar; Samsudeen Olajide Kasim; Ahmed Aidid Ibrahim; Anis Hamza Fakeeha; Ahmed Elhag Abasaeed; Rasheed Alrasheed; Abdulaziz Bagabas; Mayankkumar Lakshmanbhai Chaudhary; Francesco Frusteri; B. Chowdhury. The effect of modifier identity on the performance of Ni-based catalyst supported on γ-Al2O3 in dry reforming of methane. Catalysis Today 2019, 348, 236 -242.
AMA StyleAhmed Sadeq Al-Fatesh, Rawesh Kumar, Samsudeen Olajide Kasim, Ahmed Aidid Ibrahim, Anis Hamza Fakeeha, Ahmed Elhag Abasaeed, Rasheed Alrasheed, Abdulaziz Bagabas, Mayankkumar Lakshmanbhai Chaudhary, Francesco Frusteri, B. Chowdhury. The effect of modifier identity on the performance of Ni-based catalyst supported on γ-Al2O3 in dry reforming of methane. Catalysis Today. 2019; 348 ():236-242.
Chicago/Turabian StyleAhmed Sadeq Al-Fatesh; Rawesh Kumar; Samsudeen Olajide Kasim; Ahmed Aidid Ibrahim; Anis Hamza Fakeeha; Ahmed Elhag Abasaeed; Rasheed Alrasheed; Abdulaziz Bagabas; Mayankkumar Lakshmanbhai Chaudhary; Francesco Frusteri; B. Chowdhury. 2019. "The effect of modifier identity on the performance of Ni-based catalyst supported on γ-Al2O3 in dry reforming of methane." Catalysis Today 348, no. : 236-242.
A promising method to reduce global warming has been methane reforming with CO2, as it combines two greenhouse gases to obtain useful products. In this study, Ni-supported catalysts were synthesized using the wet impregnation method to obtain 5%Ni/Al2O3(SA-5239), 5%Ni/Al2O3(SA-6175), 5%Ni/SiO2, 5%Ni/MCM41, and 5%Ni/SBA15. The catalysts were tested in dry reforming of methane at 700 °C, 1 atm, and a space velocity of 39,000 mL/gcat h, to study the interaction of Ni with the supports, and evaluation was based on CH4 and CO2 conversions. 5%Ni/Al2O3(SA-6175) and 5%Ni/SiO2 gave the highest conversion of CH4 (78 and 75%, respectively) and CO2 (84 and 82%, respectively). The catalysts were characterized by some techniques. Ni phases were identified by X-ray diffraction patterns. Brunauer–Emmett–Teller analysis showed different surface areas of the catalysts with the least being 4 m2/g and the highest 668 m2/g belonging to 5%Ni/Al2O3(SA-5239) and 5%Ni/SBA15, respectively. The reduction profiles revealed weak NiO-supports interaction for 5%Ni/Al2O3(SA-5239), 5%Ni/MCM41, and 5%Ni/SBA15; while strong interaction was observed in 5%Ni/Al2O3(SA-6175) and 5%Ni/SiO2. The 5%Ni/Al2O3(SA-6175) and 5%Ni/SiO2 were close with respect to performance; however, the former had a higher amount of carbon deposit, which is mostly graphitic, according to the conducted thermal analysis. Carbon deposits on 5%Ni/SiO2 were mainly atomic in nature.
Anis Hamza Fakeeha; Samsudeen Olajide Kasim; Ahmed Aidid Ibrahim; Ahmed Elhag Abasaeed; Ahmed Sadeq Al-Fatesh. Influence of Nature Support on Methane and CO2 Conversion in a Dry Reforming Reaction over Nickel-Supported Catalysts. Materials 2019, 12, 1777 .
AMA StyleAnis Hamza Fakeeha, Samsudeen Olajide Kasim, Ahmed Aidid Ibrahim, Ahmed Elhag Abasaeed, Ahmed Sadeq Al-Fatesh. Influence of Nature Support on Methane and CO2 Conversion in a Dry Reforming Reaction over Nickel-Supported Catalysts. Materials. 2019; 12 (11):1777.
Chicago/Turabian StyleAnis Hamza Fakeeha; Samsudeen Olajide Kasim; Ahmed Aidid Ibrahim; Ahmed Elhag Abasaeed; Ahmed Sadeq Al-Fatesh. 2019. "Influence of Nature Support on Methane and CO2 Conversion in a Dry Reforming Reaction over Nickel-Supported Catalysts." Materials 12, no. 11: 1777.
Ni supported on bare and modified ZrO2 samples were synthesized using the incipient wet impregnation method. The t-ZrO2 phase was stabilized by incorporation of La2O3 into ZrO2. Moreover, the influence of CeO2-doping on the physico-chemical and catalytic properties under CO2 reforming conditions was probed. The characterization data of the investigated catalysts were obtained by using XRD, CO2/H2-TPD, BET, TPR, TPO, TGA, XPS and TEM characterization techniques. In the pristine Ni/Zr catalyst, the t-ZrO2 phase transformed into the monoclinic phase. However, upon support modification by La2O3, significant effects on the physicochemical properties were observed due to the monoclinic-to-tetragonal ZrO2 phase transformation also affecting the catalytic activity. As a result, superior activity on the La2O3 modified Ni/Zr catalyst was achieved, while no relevant change in the surface properties and activity of the catalysts was detected after doping by CeO2. The peculiar behavior of the Ni/La-ZrO2 sample was related to higher dispersion of the active phase, with a more pronounced stabilization of the t-ZrO2 phase.
Ahmed Sadeq Al-Fatesh; Yasir Arafat; Ahmed Aidid Ibrahim; Samsudeen Olajide Kasim; Abdulrahman Alharthi; Anis Hamza Fakeeha; Ahmed Elhag Abasaeed; Giuseppe Bonura; Francesco Frusteri. Catalytic Behaviour of Ce-Doped Ni Systems Supported on Stabilized Zirconia under Dry Reforming Conditions. Catalysts 2019, 9, 473 .
AMA StyleAhmed Sadeq Al-Fatesh, Yasir Arafat, Ahmed Aidid Ibrahim, Samsudeen Olajide Kasim, Abdulrahman Alharthi, Anis Hamza Fakeeha, Ahmed Elhag Abasaeed, Giuseppe Bonura, Francesco Frusteri. Catalytic Behaviour of Ce-Doped Ni Systems Supported on Stabilized Zirconia under Dry Reforming Conditions. Catalysts. 2019; 9 (5):473.
Chicago/Turabian StyleAhmed Sadeq Al-Fatesh; Yasir Arafat; Ahmed Aidid Ibrahim; Samsudeen Olajide Kasim; Abdulrahman Alharthi; Anis Hamza Fakeeha; Ahmed Elhag Abasaeed; Giuseppe Bonura; Francesco Frusteri. 2019. "Catalytic Behaviour of Ce-Doped Ni Systems Supported on Stabilized Zirconia under Dry Reforming Conditions." Catalysts 9, no. 5: 473.
Ni, Co, and Co–Ni bimetallic catalysts supported over SBA-15 and over SBA-15 doped with Zn or Ce oxides were prepared and tested in a methane dry reforming reaction. The loading of the metals in the catalyst was 5 wt % for either mono or bimetallic catalysts. The prepared catalysts were tested in a continuous-flow fixed-bed reactor at 800 °C under atmospheric pressure. XRD, TPR, TPD, and SEM characterization techniques were employed to investigate the catalytic properties of fresh catalysts. SEM and TGA were used to study the catalytic properties of spent catalysts. A remarkable effect on the reduction properties and catalytic performance of catalysts was observed after adding Zn and Ce. Over an 8 h test, Ni/SBA-15 showed the best activity and stability. The conversion was 90% for CH4 and CO2. Co–Ni/SBA-15 and Co–Ni/Ce–SBA-15 have shown a reasonable activity and stability. Selectivity of the Ni/SBA-15 catalyst was higher than all other catalysts as indicated by the H2/CO ratio. Co/SBA-15 and Co–Ni/Zn–SBA-15 showed a low activity and selectivity. TPD–NH3 profiles indicated that doping SBA-15 with Ce and/or Zn increased the catalyst acidic sites. Ni/SBA-15 is an excellent potential catalyst for commercial methane dry reforming processes.
Ahmed A. Ibrahim; Ashraf Amin; Ahmed S. Al-Fatesh; Nadavala Siva Kumar; Samsudeen Olajide Kasim; Abdulrhman S. Al-Awadi; Ahmed M. El-Toni; Ahmed Elhag Abasaeed; Anis H. Fakeeha. Nanosized Ni/SBA-15 Catalysts for CO2 Reforming of CH4. Applied Sciences 2019, 9, 1926 .
AMA StyleAhmed A. Ibrahim, Ashraf Amin, Ahmed S. Al-Fatesh, Nadavala Siva Kumar, Samsudeen Olajide Kasim, Abdulrhman S. Al-Awadi, Ahmed M. El-Toni, Ahmed Elhag Abasaeed, Anis H. Fakeeha. Nanosized Ni/SBA-15 Catalysts for CO2 Reforming of CH4. Applied Sciences. 2019; 9 (9):1926.
Chicago/Turabian StyleAhmed A. Ibrahim; Ashraf Amin; Ahmed S. Al-Fatesh; Nadavala Siva Kumar; Samsudeen Olajide Kasim; Abdulrhman S. Al-Awadi; Ahmed M. El-Toni; Ahmed Elhag Abasaeed; Anis H. Fakeeha. 2019. "Nanosized Ni/SBA-15 Catalysts for CO2 Reforming of CH4." Applied Sciences 9, no. 9: 1926.