(MnO/Mn3O4)-NiAl nanoparticles as smart carbon resistant catalysts for the production of syngas by means of CO2 reforming of methane: Advocating the role of concurrent carbothermic redox looping in the elimination of coke

Touahra, Fouzia; Sehailia, Moussa; Halliche, D.; Bachari, Khaldoun; Saadi, Abdelkrim; Cherifi, O.

doi:10.1016/j.ijhydene.2016.08.194

Cited by 13 publications

(12 citation statements)

References 52 publications

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“…CO2 + H2 → CO + H2O (5) In this regard, many efforts were devoted to improving the activity and coke-resistance of nickel-based catalysts. Among the various strategies proposed is the incorporation of other metal promoters such as Mn, Zr, La, Zn, Fe, Mg, Ce and Cu [10][11][12][13][14], alongside increasing the catalysts' surface basicity [15,16], and additional control of the active element particle size [17,18]. The addition of metal promoters had also attracted much attention from the scientific community [19].…”

Section: Ch4 Decomposition: Ch4 → C + 2h2mentioning

confidence: 99%

“…They also found that the catalytic activity decreased in the presence of excess Mn. Recently, our group studied a new catalyst system based on manganese incorporated within NiAl hydrotalcite derived structures in CO2 reforming of methane reaction [10]. NiAl and MnAl hydrotalcites were synthesized following co-precipitation method and NiAl-MnY (Y = ethylenediaminetetraacetic acid (EDTA)) catalyst was synthesized via intercalation of MnY 2-in the interlayer space of NiAl hydrotalcite type structure following an ionic exchange protocol.…”

Section: Ch4 Decomposition: Ch4 → C + 2h2mentioning

confidence: 99%

“…It was found that during DRM reaction, NiAl-MnY catalyst achieved the best result compared to NiAl catalyst in terms of minimizing carbon deposition and enhancing gas conversions at 700 °C. The elimination of carbon from the surface of the catalysts was explained by the possibility of in-situ redox loopi n g m e c h a n i s m i n t h e fo r m o f Mn3O4/C/MnO/CO2 [10].…”

Section: Ch4 Decomposition: Ch4 → C + 2h2mentioning

confidence: 99%

“…Ni/Al2O3, Ni/MnxOy-Al2O3 and Ni/Al2O3-MnxOyY hydrotalcite-derived catalysts were prepared via co-precipitation method following procedure previously described [10]. Ni/Al2O3 catalyst was synthesized with molar ratio (nNi 2+ /nAl 3+ ) = 2, in order to induce the formation of hydrotalcite structures.…”

Section: Catalysts Preparationmentioning

confidence: 99%

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Enhanced Long-term Stability and Carbon Resistance of Ni/MnxOy-Al2O3 Catalyst in Near-equilibrium CO2 Reforming of Methane for Syngas Production

Djebarri

Touahra

Aider

et al. 2020

Bull. Chem. React. Eng. Catal.

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Herein we study the catalytic activity/stability of a new generation of cheap and readily available Ni and Al-based catalysts using two Mn precursors, namely Mn(NO3)2 and Mn(EDTA)2- complex in the reaction of CO2 reforming of methane. In this respect, Ni/Al2O3 and two types of Ni/MnxOy-Al2O3 catalysts were successfully synthesized and characterized using various analytical techniques: TGA, ICP, XRD, BET, FTIR, TPR-H2, SEM-EDX, TEM, XPS and TPO-O2. Utilization of Mn(EDTA)2- as synthetic precursor successfully furnished Ni/Al2O3-MnxOyY (Y = EDTA) catalyst which was more active during CO2 reforming of methane when compared to Ni/MnxOy-Al2O3 catalyst, synthesized using Mn(NO3)2 precursor. Compared to Ni/MnxOy-Al2O3, Ni/Al2O3-MnxOyY catalyst afforded near-equilibrium conversion values at 700 °C (ca. 95% conversion for CH4 and CO2, and H2/CO = 0.99 over 50 h reaction time). Also, Ni/Al2O3-MnxOyY showed more resistance to carbon formation and sintering; interestingly, after 50 h reaction time, the size of Ni0 particles in Ni/MnxOy-Al2O3 almost doubled while that of Ni/Al2O3-MnxOyY remained unchanged. The elevated conversion of CO2 and CH4 in conjunction with the observed low carbon deposition on the surface of our best catalyst (Ni/Al2O3-MnxOyY) indicated the presence of MnxOy oxide positioning mediated simultaneous in-situ carbon elimination with subsequent generation of oxygen vacant sites on the surface for more CO2 adsorption. Copyright © 2020 BCREC Group. All rights reserved

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Section: Ch4 Decomposition: Ch4 → C + 2h2mentioning

confidence: 99%

Section: Ch4 Decomposition: Ch4 → C + 2h2mentioning

confidence: 99%

Section: Ch4 Decomposition: Ch4 → C + 2h2mentioning

confidence: 99%

Section: Catalysts Preparationmentioning

confidence: 99%

See 2 more Smart Citations

Enhanced Long-term Stability and Carbon Resistance of Ni/MnxOy-Al2O3 Catalyst in Near-equilibrium CO2 Reforming of Methane for Syngas Production

Djebarri

Touahra

Aider

et al. 2020

Bull. Chem. React. Eng. Catal.

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“…57.3. They shown the characteristic bands of hydrotalcite-like compounds [9]. The broad band at 3400 cm −1 is attributed to the υ (OH) vibration mode of lamellar OH groups and water molecules, either inserted in the interlamellar space or physisorbed on the surface.…”

Section: Characterizationmentioning

confidence: 99%

Effect of Silicates and Carbonates on the Structure of Nickel-Containing Hydrotalcite-Derived Materials

Djebarri

Aider

Touahra

et al. 2020

Springer Proceedings in Energy

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The NiAl and NiAlSi were prepared by coprecipitation method at constant basic pH, calcined at 800°C, and characterized by ICP analysis, XRD, FTIR, SEM, BET method and (TPR). The CH 4 /CO 2 reaction was carried out in a fixed-bed tubular reactor at 750°C. A reactant mixture CH 4 and CO 2 were mixed at a ratio of 1 diluted in He (10:10:80). The XRD patterns of the "as prepared" materials exhibit the characteristic diffractions of hydrotalcite-like layered double hydroxide materials, although were not clearly evidenced in the Si containing samples. Nevertheless, after calcination this hydroltacite-like structure is destroyed. We have studied the reaction of dry reforming of methane by carbon dioxide in presence of various catalysts at 750°C. In the case of NiAlSi, the CH 4 conversions were close to 70%, with a H 2 /CO ratio close to 0.9. Nevertheless, the NiAl sample presented a very variable conversion and a high carbon formation, what resulted in a blocking of the reactor at the end of the experience and a decrease in the H 2 /CO ratio, which indicates that probably the CO 2 is consumed in parallel in the reverse water gas shift reaction (RWGS). We have shown that Ni/Al/Si mixed oxides obtained through the thermal decomposition of layered double hydroxide-type precursors are promising catalysts in the reforming of methane with CO 2 .

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Antibacterial activity of mixed metal oxide derived from Zn-Al layered double hydroxide precursors, effect of calcination temperature

Ghribi,

Bouarroudj,

Messai

et al. 2024

Biologia

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(MnO/Mn3O4)-NiAl nanoparticles as smart carbon resistant catalysts for the production of syngas by means of CO2 reforming of methane: Advocating the role of concurrent carbothermic redox looping in the elimination of coke

Cited by 13 publications

References 52 publications

Enhanced Long-term Stability and Carbon Resistance of Ni/MnxOy-Al2O3 Catalyst in Near-equilibrium CO2 Reforming of Methane for Syngas Production

Enhanced Long-term Stability and Carbon Resistance of Ni/MnxOy-Al2O3 Catalyst in Near-equilibrium CO2 Reforming of Methane for Syngas Production

Effect of Silicates and Carbonates on the Structure of Nickel-Containing Hydrotalcite-Derived Materials

Antibacterial activity of mixed metal oxide derived from Zn-Al layered double hydroxide precursors, effect of calcination temperature

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