Surface properties and catalytic behavior of Ru supported on composite La2O3–SiO2 oxides

Faroldi, Betina María Cecilia; Lombardo, E.A.; Cornaglia, Laura María

doi:10.1016/j.apcata.2009.08.024

Cited by 53 publications

(50 citation statements)

References 42 publications

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“…For the lanthanum species (Table 4), the binding energies and the main peak -satellite splits were close to 3.7 eV and the main peak to satellite (shake up) peak intensity ratio was approximately 0.93 ± 0.2 eV, slightly higher than the value observed in the lanthanum oxide (0.77), in agreement with those previously reported for La exchanged zeolites [33] and Ru/La 2 O 3 -SiO 2 catalysts [19]. In these previous studies, [33,34] The elemental composition of the catalysts and the ETS-10 was studied by XPS and the results are summarized in Table 4.…”

Section: Characterization Of Ru/la(x)ets-10 Catalystssupporting

confidence: 79%

“…In fact, the catalyst with the higher dispersion (65%) has the lower TOF value.The increase of metal dispersion due to the presence of La was previously observed for Rh supported on SiO 2 [22], although for these catalysts the values of TOF did not follow the dispersion trend. The same happen for Ru/La 2 O 3 -SiO 2 solids, in which the metal-suport interaction would play an important role [19].…”

Section: Comparison Of the Average Reaction Ratesmentioning

confidence: 93%

“…The catalytic activity of the solids was evaluated in the DRM reaction in a conventional fixed bed reactor at 550 °C (Table 1) In addition, these catalysts exhibited reaction rates higher than the Ru/La 2 O 3 -SiO 2 catalyst [19]. These high reaction rates could be related to the lanthanum participation in the reaction mechanism [17].…”

Section: Comparison Of the Average Reaction Ratesmentioning

confidence: 99%

See 2 more Smart Citations

Influence of La incorporation on the catalytic activity of Ru/ETS-10 catalysts for hydrogen production

Faroldi

Irusta

Cornaglia

2015

Applied Catalysis A: General

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The incorporation of lanthanum on ETS-10 titanosilicate and its influence on the catalytic activity of Ru catalysts for the dry reforming of methane reaction were studied.The catalysts were prepared through ion exchange of ETS-10 using different lanthanum solution concentrations (0.1, 0.2 and 0.4 % wt of La 2 O 3 ). The Ru loading was 0.6 wt.% for all catalysts. The methane reaction rates for Ru/LaETS-10 catalysts showed an increase in comparison with Ru/ETS-10. This could be related to the lanthanum participation in the reaction mechanism. Moreover, all the formulations were stable after 70 h on stream.In order to study the effect of lanthanum exchange in the structure of ETS-10 supports, the solids were characterized by BET, XRD, TEM, FTIR XPS, and Laser Raman spectroscopy.The relative crystallinities were lower than 80%, indicating that the La exchange could have an important effect on the crystalline structure of ETS-10, in agreement with Raman and FTIR results.The surface Ru/Ti ratio determined by XPS was higher in the case of Ru/LaETS-10 synthesized with the highest La concentration in the exchange solution. The Na/Ti ratio, measured by XPS and EDX, was lower for the Ru/LaETS-10 catalysts compared with ETS-10 suggesting that La was exchanged in the structure.

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Section: Characterization Of Ru/la(x)ets-10 Catalystssupporting

confidence: 79%

Section: Comparison Of the Average Reaction Ratesmentioning

confidence: 93%

Section: Comparison Of the Average Reaction Ratesmentioning

confidence: 99%

See 1 more Smart Citation

Influence of La incorporation on the catalytic activity of Ru/ETS-10 catalysts for hydrogen production

Faroldi

Irusta

Cornaglia

2015

Applied Catalysis A: General

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“…When varying the reduction temperatures, the metal dispersion as well as the particle size of the metal could be changed and resultantly affect the activity of the catalyst [48,49]. As the reduction pretreatment is performed to reduce the mixed metallic oxides, thus the phase composition of the metallic oxides which connect closely with the calcination procedure should be emphatically considered.…”

Section: Effect Of Thermal and Reduction Treatmentmentioning

confidence: 99%

Development of Ni-Based Catalysts Derived from Hydrotalcite-Like Compounds Precursors for Synthesis Gas Production via Methane or Ethanol Reforming

Cheng

et al. 2017

Catalysts

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As a favorably clean fuel, syngas (synthesis gas) production has been the focus of concern in past decades. Substantial literatures reported the syngas production by various catalytic reforming reactions particularly in methane or ethanol reforming. Among the developed catalysts in these reforming processes, Ni-based catalysts from hydrotalcite-like compounds (HTLcs) precursors have drawn considerable attention for their preferable structural traits. This review covers the recent literature reporting syngas production with Ni-based catalysts from HTLc precursors via methane or ethanol reforming. The discussion was initiated with catalyst preparation (including conventional and novel means), followed by subsequent thermal treatment processes, then composition design and the addition of promoters in these catalysts. As Ni-based catalysts have thermodynamic potential to deactivate because of carbon deposition or metal sintering, measures for dealing with these problems were finally summarized. To obtain optimal catalytic performances and resultantly better syngas production, based on analyzing the achievements of the references, some perspectives were finally proposed.

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“…Thus a catalyst comprising ruthenium comes to be used widely as described above, because the catalyst performance is higher than the conventional catalyst like supported nickel (Ni/Al 2 O 3 ) 6) . Ruthenium based catalysts for industrial use have been exclusively prepared by impregnating method using ruthenium trichloride (RuCl 3 ･ nH 2 O) showing water soluble property 10) . In order to obtain deeply reduced ruthenium species as Ru 0 showing high activity for various reforming reactions and to remove chlorine from the catalyst surface, reduction procedure as activation is desired in most cases before these catalysts are applied to reactions 11) .…”

Section: Introductionmentioning

confidence: 99%

An Attempt to Activate Silica Supported Ruthenium Catalyst Abbreviating Reduction Procedure; Evaluation of Oxidation State of Ruthenium Species by Hydrogenation of 1,3-butadiene

Suzuki

Murakami²,

Kimura³

2012

Trans. Mat. Res. Soc. Japan

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Ruthenium based industrial catalysts have been manufactured exclusively using ruthenium chloride as RuCl 3 ･nH 2 O which shows water soluble properties. Activation process, usually hydrogenation, is required to remove chlorine and obtain low oxidation state of ruthenium species which gives excellent activity and selectivity. Recently, for instance, small packaged co-generation system equipped with a PEM-FC (polymer electrode membrane -fuel cell) has been noticeable technology, therefore, the way to obtain instantly active state of catalyst at startup stage in the co-generation system becomes important. In this study, when the precursor of Ru/SiO 2 catalyst obtained by conventional impregnation was soaked in the diluted aqueous ammonia, the hydrogenation of 1,3-butadiene rapidly proceeded on the catalyst abbreviating reduction procedure. The conversion of 1,3-butadiene on the catalyst was closely related to the existence of the deeply reduced ruthenium species on carrier such as silica. Thus the catalyst treated with aqueous ammonia gave ruthenium species with low oxidation state despite having abbreviated reduction procedure.

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Surface properties and catalytic behavior of Ru supported on composite La2O3–SiO2 oxides

Cited by 53 publications

References 42 publications

Influence of La incorporation on the catalytic activity of Ru/ETS-10 catalysts for hydrogen production

Influence of La incorporation on the catalytic activity of Ru/ETS-10 catalysts for hydrogen production

Development of Ni-Based Catalysts Derived from Hydrotalcite-Like Compounds Precursors for Synthesis Gas Production via Methane or Ethanol Reforming

An Attempt to Activate Silica Supported Ruthenium Catalyst Abbreviating Reduction Procedure; Evaluation of Oxidation State of Ruthenium Species by Hydrogenation of 1,3-butadiene

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