Ceria promotion over Ni-containing hydrotalcite-derived catalysts for CO<sub>2</sub>methane reforming

Dębek, Radosław; Motak, Monika; Gálvez, María Elena; Grzybek, Teresa; Costa, Patrick Da; Pieńkowski, L.

doi:10.1051/e3sconf/20171402039

Cited by 8 publications

(4 citation statements)

References 34 publications

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“…In this range nearby 1600–1700 cm −1 was due to interlayer H 2 O bending vibration. The band noted at 1350–1380 cm −1 may demonstrate that the CO 3 2− were present in the interlayer of HT 41 . The stretching vibrational frequency H‐atom in –OH group of HT‐LaMOFs noted at lower wavelength 3420 cm −1 .…”

Section: Resultsmentioning

confidence: 85%

“…The band noted at 1350-1380 cm À1 may demonstrate that the CO 3 2À were present in the interlayer of HT. 41 The stretching vibrational frequency H-atom in -OH group of HT-LaMOFs noted at lower wavelength 3420 cm À1 . The significant bands were observed at 1628 and 1568 cm À1 ascribed to asymmetric stretching vibrations of carboxylate in linker, and the bands noted at 1442 and 1372 cm À1 were correlated to symmetric stretching vibrations of carboxylate in linker.…”

Section: Ftir Investigationsmentioning

confidence: 97%

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Fabricated design of hydrotalcite embedded lanthanum organic frameworks for defluoridation of water

Jeyaseelan

Viswanathan

Govindasamy

et al. 2023

Env Prog and Sustain Energy

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The surplus fluoride in drinking water leads to diseases namely fluorosis (dental, skeletal, and non‐skeletal). Hence, to overcome these problems, in this study, hydrotalcite (HT) integrated La‐based metal‐organic frameworks (LaMOFs) namely HT‐LaMOFs was fabricated for fluoride removal. The fabricated HT‐LaMOFs material was well characterized by various characterization methods (x‐ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), Energy‐dispersive X‐ray spectroscopy (EDAX), thermogravimetric analysis (TGA), and differential thermal analysis (DTA)) to find the structural properties and stability of HT‐LaMOFs. To find the fluoride adsorption nature, the batch studies were employed towards fluoride adsorption such as reaction time, co‐ions, HT‐LaMOFs dosage, pH, initial fluoride concentration, selectivity, pHzpc, and temperature studies. The contact time studies results reveals that the defluoridation capacity (DC) of HT‐LaMOFs was towards fluoride was found as 4451 mgF− kg−1 at 30 min than HT (1030 mgF− kg−1 at 50 min). The DC had little influences in the presence of HCO3− ion compared to other ions. Fluoride adsorption mechanism of HT‐LaMOFs was initiated to be electrostatic interaction, ion‐exchange and complexation. Fluoride adsorption onto HT‐LaMOFs was well matched and followed with Langmuir model. Thermodynamic investigations exposed that the adsorption of fluoride onto HT‐LaMOFs followed by spontaneous and endothermic nature. Kinetic studies of HT‐LaMOFs on fluoride capture followed with pseudo‐second‐order and intraparticle diffusion models. Defluoridation by HT‐LaMOFs was followed endothermic with spontaneous nature of adsorption system. The regeneration study results of HT‐LaMOFs revealed that the developed HT‐LaMOFs was regenerable up to six cycles. In addition, field study outcomes revealed that the developed HT‐LaMOFs diminished fluoride concentration under the acceptable limit as 1.5 mg/L.

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Section: Resultsmentioning

confidence: 85%

Section: Ftir Investigationsmentioning

confidence: 97%

Fabricated design of hydrotalcite embedded lanthanum organic frameworks for defluoridation of water

Jeyaseelan

Viswanathan

Govindasamy

et al. 2023

Env Prog and Sustain Energy

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“…There are focuses on the development of DRM catalysts for catalysts with the following features: greater activity and greater stability towards coke formation, sintering, the formation of inactive chemical species and metal oxidation [115]. The catalytic efficiency could be improved by changing the catalyst's active sites by adding supports and promoters during catalyst preparing to increase conversion and selectivity [116].…”

Section: Catalysts Developed For Co 2 Reformingmentioning

confidence: 99%

Catalysts for the Simultaneous Production of Syngas and Carbon Nanofilaments Via Catalytic Decomposition of Biogas

Al-Timimi¹,

Yaakob²

2022

Natural Gas - New Perspectives and Future Developments [Working Title]

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The possibility of alleviation of methane and carbon dioxide levels in the atmosphere are of major global interest. One of the alternatives that attracts much scientific attention is their chemical utilization, especially because both of these gases are components of the biogas. Thus, the rapid and extensive shale gas development makes them abundant raw materials. The development of an effective catalytic process that could be scaled-up for industrial purposes remains a great challenge for catalysis. As well, understanding of the mechanisms of molecular activation and the reaction pathways over active centers on heterogeneous catalysts needs to be advanced. It has been shown that biogas is a very interesting source of renewable energy. Because of its elevated methane content, biogas has excellent potential, as reflected in its year-over-year rise in production. This is because its manufacturing promotes the use of organic waste, prevents uncontrolled dumping and minimizes atmospheric methane and carbon dioxide emissions. Moreover, its use as an energy source is in some cases an alternative to fossil fuels and can help to minimize energy dependence. Another aspect of interest is that it can be used in situ, allowing agro-livestock farms or small industrial plants to achieve energy self-sufficiency.

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“…The use of supports with high oxygen storage capacity is another option to overcome the deactivation of catalysts during DRM. Modified fluorite-like supports, doublelayered hydroxides, hydrotalcites, nanocatalysts and especially mixed oxides as CexZr1-xO2 materials are believed to be promising supports for good Ni dispersion and coke control in DRM [26,27].…”

Section: Introductionmentioning

confidence: 99%

Continuous supercritical solvothermal preparation of nanostructured ceria-zirconia as supports for dry methane reforming catalysts

Auxéméry

Frias

Smal

et al. 2020

The Journal of Supercritical Fluids

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The nanostructured CexZr1-xO2 systems (0 ≤ x ≤ 0.75) were prepared combining alkoxide and nitrate precursors in an ethanol/water mixture by the continuous supercritical solvothermal solgel like synthesis. They were subsequently used as supports for nickel impregnation (10 wt.%) to obtain catalysts for dry reforming of methane (DRM) reaction. A reference CexZr1-xO2 (x = 0.50) system prepared via conventional coprecipitation method was used as a support for nickel impregnation in the comparative study of the nanostructured materials' catalytic potential. The morphological and structural properties of the prepared nanostructured supports and Nicontaining catalysts were investigated by numerous techniques as XRD, Raman spectroscopy, SEM, TEM, EDS, chemisorption and others. The conditions of DRM reaction were chosen in order to compare the activity, the stability as well as the selectivity of coke formation in the presence of the prepared catalytic materials. It was found that the industrial catalyst leads to heavy coking in the chosen conditions with a rapid loss of activity. While the nanostructured CexZr1-xO2 (0 ≤ x ≤ 0.75) materials are found to be promising supports for Ni dispersion and coke control in DRM. In this study the nanostructured Ce0.50Zr0.50O2 material impregnated with nickel shown the highest TOF and the smallest selectivity of coke formation in DRM among other nanostructured materials. The continuous supercritical solvothermal method allows to prepare nanostructured mixed oxides materials that could be promising supports for different active metals dispersion and for coke control in the reactions where coking may be abundant.

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Ceria promotion over Ni-containing hydrotalcite-derived catalysts for CO₂methane reforming

Cited by 8 publications

References 34 publications

Fabricated design of hydrotalcite embedded lanthanum organic frameworks for defluoridation of water

Fabricated design of hydrotalcite embedded lanthanum organic frameworks for defluoridation of water

Catalysts for the Simultaneous Production of Syngas and Carbon Nanofilaments Via Catalytic Decomposition of Biogas

Continuous supercritical solvothermal preparation of nanostructured ceria-zirconia as supports for dry methane reforming catalysts

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Ceria promotion over Ni-containing hydrotalcite-derived catalysts for CO2methane reforming

Cited by 8 publications

References 34 publications

Fabricated design of hydrotalcite embedded lanthanum organic frameworks for defluoridation of water

Fabricated design of hydrotalcite embedded lanthanum organic frameworks for defluoridation of water

Catalysts for the Simultaneous Production of Syngas and Carbon Nanofilaments Via Catalytic Decomposition of Biogas

Continuous supercritical solvothermal preparation of nanostructured ceria-zirconia as supports for dry methane reforming catalysts

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Ceria promotion over Ni-containing hydrotalcite-derived catalysts for CO₂methane reforming