Effect of modified surface of Co/Al2O3 on properties and catalytic performance for CO2 reforming of methane

Ratana, Tanakorn; Jadsadajerm, Supachai; Tungkamani, Sabaithip; Sumarasingha, Wassachol; Phongaksorn, Monrudee

doi:10.1016/j.jpcs.2024.112034

Cited by 2 publications

(1 citation statement)

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“…This network of metal oxide nanoparticles is clearly visible on 5Ni5Ce(20 h)/MA (Figure 1c), implying the growth of the NiO-CeO 2 interaction throughout the ammonia vapor diffusion. This can be explained by layered double hydroxide (LDH) synthesis via ammonia vapor diffusion impregnation [19][20][21]. When ammonia vapor is dissolved into the impregnated nickel-cerium nitrate solution on the support, a limited amount of hydroxide ions are produced, conducting the slow growth of the layered double hydroxide ([Ni 1−-x Ce x (OH) 2 ] z+ (NO 3 ) z •nH 2 O) throughout the diffusion time [22][23][24].…”

Section: Physical Propertiesmentioning

confidence: 99%

Enhancement of Ni-NiO-CeO2 Interaction on Ni–CeO2/Al2O3-MgO Catalyst by Ammonia Vapor Diffusion Impregnation for CO2 Reforming of CH4

Tungkamani,

Intarasiri,

Sumarasingha

et al. 2024

Molecules

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Ni-based catalysts have been widely used for the CO2 reforming of methane (CRM) process, but deactivation is their main problem. This study created an alternative electronic Ni-NiO-CeO2 interaction on the surface of 5 wt% Ni-5 wt% CeO2/Al2O3-MgO (5Ni5Ce(xh)/MA) catalysts to enhance catalytic potential simultaneously with coke resistance for the CRM process. The Ni-NiO-CeO2 network was developed on Al2O3-MgO through layered double hydroxide synthesis via our ammonia vapor diffusion impregnation method. The physical properties of the fresh catalysts were analyzed employing FESEM, N2 physisorption, and XRD. The chemical properties on the catalyst surface were analyzed employing H2-TPR, XPS, H2-TPD, CO2-TPD, and O2-TPD. The CRM performances of reduced catalysts were evaluated at 600 °C under ambient pressure. Carbon deposits on spent catalysts were determined quantitatively and qualitatively by TPO, FESEM, and XRD. Compared to 5 wt% Ni-5 wt% CeO2/Al2O3-MgO prepared by the traditional impregnation method, the electronic interaction of the Ni-NiO-CeO2 network with the Al2O3-MgO support was constructed along the time of ammonia diffusion treatment. The electronic interaction in the Ni-NiO-CeO2 nanostructure of the treated catalyst develops surface hydroxyl sites with an efficient pathway of OH* and O* transfer that improves catalytic activities and coke oxidation.

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Section: Physical Propertiesmentioning

confidence: 99%

Enhancement of Ni-NiO-CeO2 Interaction on Ni–CeO2/Al2O3-MgO Catalyst by Ammonia Vapor Diffusion Impregnation for CO2 Reforming of CH4

Tungkamani,

Intarasiri,

Sumarasingha

et al. 2024

Molecules

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Exploring the performance of Co/Al₂O₃–ZrO₂ nanocatalysts developed through the thermal evaporation method in dry reforming of methane

Moradi,

Moradi

2024

International Journal of Chemical Reactor Engineering

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This study aimed to investigate the performance of the thin layer nanostructures of Co/Al2O3–ZrO2 in the dry reforming of methane (DRM) in a microchannel reactor. The nanostructures were prepared via utilizing the thermal evaporation method. Reactor tests were carried out at various coating times of 2, 3, and 4 min and temperatures of 700, 750, and 800 °C with a feed flow rate of 10 ml/min and a 1:1:8 ratio of helium, carbon dioxide, and methane. Also, grazing incidence X-ray diffraction (GIXRD), field emission scanning electron microscopy (FESEM), and energy-dispersive X-ray (EDX) were used to identify catalyst features. According to the obtained results, the highest percentage of conversion in all samples was observed at 800 °C. The results of the reactor tests also revealed that the activity of catalyst layers highly depends on coating time. The findings demonstrated that raising deposition time improves the distribution of particle size and catalyst loading. Considering the nanostructure of Co/Al2O3–ZrO2, the sample undergoing 4 min coating time yielded the highest amount of primary methane conversion (89.3 %), primary carbon dioxide conversion (92.4 %), and H2/CO molar ratio (0.91). The stability test of the catalyst layers for 28 h at the optimum condition (P = 1 atm, T = 800 °C, t = 4 min deposition time, CH4/CO2 = 1, and GHSV = 48,000 mL g−1 h−1) showed that the catalysts prepared by this method had a good stability.

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Effect of modified surface of Co/Al2O3 on properties and catalytic performance for CO2 reforming of methane

Cited by 2 publications

References 59 publications

Enhancement of Ni-NiO-CeO2 Interaction on Ni–CeO2/Al2O3-MgO Catalyst by Ammonia Vapor Diffusion Impregnation for CO2 Reforming of CH4

Enhancement of Ni-NiO-CeO2 Interaction on Ni–CeO2/Al2O3-MgO Catalyst by Ammonia Vapor Diffusion Impregnation for CO2 Reforming of CH4

Exploring the performance of Co/Al₂O₃–ZrO₂ nanocatalysts developed through the thermal evaporation method in dry reforming of methane

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Effect of modified surface of Co/Al2O3 on properties and catalytic performance for CO2 reforming of methane

Cited by 2 publications

References 59 publications

Enhancement of Ni-NiO-CeO2 Interaction on Ni–CeO2/Al2O3-MgO Catalyst by Ammonia Vapor Diffusion Impregnation for CO2 Reforming of CH4

Enhancement of Ni-NiO-CeO2 Interaction on Ni–CeO2/Al2O3-MgO Catalyst by Ammonia Vapor Diffusion Impregnation for CO2 Reforming of CH4

Exploring the performance of Co/Al2O3–ZrO2 nanocatalysts developed through the thermal evaporation method in dry reforming of methane

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Exploring the performance of Co/Al₂O₃–ZrO₂ nanocatalysts developed through the thermal evaporation method in dry reforming of methane