Influence of ni addition to a low-loaded palladium catalyst on the selective hydrogenation of 1-heptyne

Lederhos, Cecilia; Badano, Juan; Quiroga, Mónica; L’Argentière, Pablo C.; Coloma, Fernando

doi:10.1590/s0100-40422010000400010

Cited by 17 publications

(24 citation statements)

References 24 publications

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“…The Ni-Pd/Al2O3 first peak is at the range of 100 to 200 °C which is due to the reduction of PdO and a second peak at the range of 300 to 600 °C which may be due to the reduction of NiAl2O4 species, which were formed by the diffusion of Ni 2+ into the support. The results is similar to those reported by Lederhos et al [22]. It can be observed that the presence of nickel shifted the peaks of NiO from 700 °C to lower temperature range, suggesting that the Ni-Pd/Al2O3 catalyst is easier to be reduced.…”

Section: Bulletin Of Chemical Reaction Engineering and Catalysis 11 (2supporting

confidence: 91%

Thermo-Catalytic Methane Decomposition for Hydrogen Production: Effect of Palladium Promoter on Ni-based Catalysts

Mei

Lock

et al. 2016

Bull. Chem. React. Eng. Catal.

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Hydrogen production from the direct thermo-catalytic decomposition of methane is a promising alternative for clean fuel production. However, thermal decomposition of methane can hardly be of any practical and empirical interest in the industry unless highly efficient and effective catalysts, in terms of both catalytic activity and operational lifetime have been developed. In this study, the effect of palladium (Pd) as a promoter onto Ni supported on alumina catalyst has been investigated by using coprecipitation technique. The introduction of Pd promotes better catalytic activity, operational lifetime and thermal stability of the catalyst. As expected, highest methane conversion was achieved at reaction temperature of 800 °C while the bimetallic catalyst (1 wt.% Ni -1 wt.% Pd/Al2O3) gave the highest methane conversion of 70% over 15 min of time-on-stream (TOS). Interestingly, the introduction of Pd as promoter onto Ni-based catalyst also has a positive effect on the operational lifetime and thermal stability of the catalyst as the methane conversion has improved significantly over 240 min of TOS.

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Section: Bulletin Of Chemical Reaction Engineering and Catalysis 11 (2supporting

confidence: 91%

Thermo-Catalytic Methane Decomposition for Hydrogen Production: Effect of Palladium Promoter on Ni-based Catalysts

Mei

Lock

et al. 2016

Bull. Chem. React. Eng. Catal.

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“…Palladium is widely used in hydrogenation reactions due to its high hydrogenating capacity, being active and selective at low temperatures 19,34,35 . Overhydrogenation should however be avoided.…”

Section: Introductionmentioning

confidence: 99%

Olefin Purification and Selective Hydrogenation of Alkynes with Low Loaded Pd Nanoparticle Catalysts

Cordoba

Coloma

Quiroga

et al. 2019

Ind. Eng. Chem. Res.

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“…In our case, the high degree of sintering of the ruthenium metal particles could be due to the fact that, during the pretreatment process, no oxychlorinated species interacting with the support are formed, as noted earlier while studying ruthenium catalysts of different metal contents over the alumina support [12,21]. e low dispersion of nickel is a characteristic when this metal is used to prepare inorganic or carbonaceous catalysts [52,53].…”

Section: Catalysts and Support Characterizationmentioning

confidence: 55%

High-Active Metallic-Activated Carbon Catalysts for Selective Hydrogenation

Carrara

Betti

Coloma

et al. 2018

International Journal of Chemical Engineering

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A series of low-loaded metallic-activated carbon catalysts were evaluated during the selective hydrogenation of a medium-chain alkyne under mild conditions. e catalysts and support were characterized by ICP, hydrogen chemisorption, Raman spectroscopy, temperature-programmed desorption (TPD), temperature-programmed reduction (TPR), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR micro-ATR), transmission electronic microscopy (TEM), and X-ray photoelectronic spectroscopy (XPS). When studying the effect of the metallic phase, the catalysts were active and selective to the alkene synthesis. NiCl/C was the most active and selective catalytic system. Besides, when the precursor salt was evaluated, PdN/C was more active and selective than PdCl/C. Meanwhile, alkyne is present in the reaction media, and geometrical and electronic effects favor alkene desorption and so avoid their overhydrogenation to the alkane. Under mild conditions, nickel catalysts are considerably more active and selective than the Lindlar catalyst.

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Influence of ni addition to a low-loaded palladium catalyst on the selective hydrogenation of 1-heptyne

Cited by 17 publications

References 24 publications

Thermo-Catalytic Methane Decomposition for Hydrogen Production: Effect of Palladium Promoter on Ni-based Catalysts

Thermo-Catalytic Methane Decomposition for Hydrogen Production: Effect of Palladium Promoter on Ni-based Catalysts

Olefin Purification and Selective Hydrogenation of Alkynes with Low Loaded Pd Nanoparticle Catalysts

High-Active Metallic-Activated Carbon Catalysts for Selective Hydrogenation

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