Effect of Rh Addition to Ni/MgO-Al<sub>2</sub>O<sub>3</sub> Catalysts for Dry Reforming of Methane

Ocsachoque, Marco Antonio; Aparicio, María Silvia Leguizamón; González, María Teresa Rodríguez

doi:10.17485/ijst/2017/v10i12/107464

Cited by 6 publications

(4 citation statements)

References 30 publications

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“…In all the cases, there is a considerable shift in the reduction temperature to a lower range. This supports the presence of noble metal ruthenium, which promotes the reduction of nickel at lower temperature …”

Section: Results and Discussionsupporting

confidence: 68%

“…The observed shift in reduction temperature to a lower temperature range and broad reduction peak of the noble metal-containing catalysts could be related to the presence of Ru and Rh, which promotes the reducibility of the catalyst via a hydrogen spillover mechanism from the noble metal to the bimetallic catalyst surface. 32,33 The NiFe-0.2 catalyst inhibited the reduction process compared to the noble metal-containing catalyst, and a reduction peak in the temperature range of approximately 400 to 700 °C with two reduction maxima at 540 and 675 °C was observed. The low-temperature reduction may be attributed to the reduction of NiO to Ni, and the hightemperature reduction corresponds to the conversion of Fe 2 O 3 to Fe.…”

Section: Resultsmentioning

confidence: 99%

“…This supports the presence of noble metal ruthenium, which promotes the reduction of nickel at lower temperature. 32 The morphology of the NiRu-0.2 HT catalyst was determined by SEM analysis, and the image is presented in Figure 6. The sample consisted of particles with irregular morphologies.…”

Section: Resultsmentioning

confidence: 99%

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Hydrogenation of Lignin-Derived Phenolic Compound Eugenol over Ruthenium-Containing Nickel Hydrotalcite-Type Materials

Sreenavya

Sahu

Sakthivel

2020

Ind. Eng. Chem. Res.

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Sustainable production of fine chemicals and fuels from renewable energy resources is an important process in the current scenario of the energy crisis. In this study, we have reported complete hydrogenation of eugenol, which is an important biomass-derived molecule using ruthenium-containing nickel hydrotalcite (NiRu-HT)-type materials and isopropyl alcohol as a solvent. A series of group VIII metals containing bimetallic Ni-HT-type materials were synthesized, characterized, and demonstrated to participate in eugenol conversion, and among which, Ni-Ru-HT was found to give the highest selectivity toward alkyl cyclohexanol. The reaction conditions, including reaction temperature, hydrogen pressure, and the Ni/Ru ratio, were optimized. Based on the results, it can be concluded that eugenol was first hydrogenated to 4-propyl guaiacol and then underwent simultaneous demethoxylation and aromatic ring hydrogenation to form 4-propylcyclohexanol. Moreover, various lignin-derived phenolic compounds can be efficiently converted into alkyl cyclohexanols and aromatic compounds into alkyl cyclohexane. The in situ formation of metallic ruthenium on the surface of NiRu-HT evident from TPR and TEM analyses is responsible for observed high yields of ring hydrogenated products of eugenol (i.e., 4-propylcyclohexanol).

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Section: Results and Discussionsupporting

confidence: 68%

Section: Resultsmentioning

confidence: 99%

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Hydrogenation of Lignin-Derived Phenolic Compound Eugenol over Ruthenium-Containing Nickel Hydrotalcite-Type Materials

Sreenavya

Sahu

Sakthivel

2020

Ind. Eng. Chem. Res.

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“…The catalyst most extensively used in the DMR reac tion is Nibased catalyst, due to their high activity [22,23], high availability and lowcost (compared with noble metals) [24]. However, nickel catalysts are prone to carbon formation which results in fast deactivation [25].…”

Section: Introductionmentioning

confidence: 99%

Oxidation behavior of Ni/Al₂O₃ catalyst in nonthermal plasma-enabled catalysis

Sheng

Kameshima

Yao

et al. 2018

J. Phys. D: Appl. Phys.

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The oxidation behavior of Ni/Al 2 O 3 catalyst in CO 2 plasma was investigated compared with CO 2 thermal oxidation, aiming for providing new insight into oxidationreduction cycle of plasma catalysis of dry methane reforming (DMR). Temperature programmed reaction spectrometry was applied to enable a quantitative analysis of gas consumption which is related to the oxidation and reduction of Ni/Al 2 O 3 catalysts. The nonthermal plasma oxidation mechanism was further analyzed by Raman spectroscopy, showing the crosssectional distribution of NiO over the 3 mm spherical catalyst pellets. Nonthermal plasmaexcited CO 2 oxidizes Ni only near the external surface of spherical pellets with 20 μm depth: both dielectric barrier discharge generation and plasmaexcited species diffusion into the internal pores are inhibited. The partially oxidized Ni catalyst in the external surface would promote plasmaenabled oxidationreduction cycle, which was further correlated with coke formation behavior in plasma catalysis of DMR.

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Light‐Driven Dry Reforming of Methane on Metal Catalysts

Sun

2020

Solar RRL

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Dry reforming of methane (DRM) is promising to produce syngas with low ratios of H2/CO with the feedstock of greenhouse gases, CH4 and CO2. Synthesizing active and selective catalysts and developing the protocols for stable and durable operation is crucial to implement DRM for the production of syngas. High‐temperature operation and deposition of carbon on the surface of catalysts represent two significant challenges to prevent the adaption of DRM in industry. Light‐driven catalysis of DRM can lower operating temperature and reduce the deposition of carbon, offering the promise to tackle the challenges faced in traditional thermocatalysis of DRM. Herein, the light‐driven DRM on metal catalysts of various structures, highlighting the encouraging promise of photocatalysis for DRM, is overviewed.

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Effect of Rh Addition to Ni/MgO-Al₂O₃ Catalysts for Dry Reforming of Methane

Cited by 6 publications

References 30 publications

Hydrogenation of Lignin-Derived Phenolic Compound Eugenol over Ruthenium-Containing Nickel Hydrotalcite-Type Materials

Hydrogenation of Lignin-Derived Phenolic Compound Eugenol over Ruthenium-Containing Nickel Hydrotalcite-Type Materials

Oxidation behavior of Ni/Al₂O₃ catalyst in nonthermal plasma-enabled catalysis

Light‐Driven Dry Reforming of Methane on Metal Catalysts

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Effect of Rh Addition to Ni/MgO-Al2O3 Catalysts for Dry Reforming of Methane

Cited by 6 publications

References 30 publications

Hydrogenation of Lignin-Derived Phenolic Compound Eugenol over Ruthenium-Containing Nickel Hydrotalcite-Type Materials

Hydrogenation of Lignin-Derived Phenolic Compound Eugenol over Ruthenium-Containing Nickel Hydrotalcite-Type Materials

Oxidation behavior of Ni/Al2O3 catalyst in nonthermal plasma-enabled catalysis

Light‐Driven Dry Reforming of Methane on Metal Catalysts

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Product

Resources

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Effect of Rh Addition to Ni/MgO-Al₂O₃ Catalysts for Dry Reforming of Methane

Oxidation behavior of Ni/Al₂O₃ catalyst in nonthermal plasma-enabled catalysis