Methane dry reforming using Ni/Al2O3 catalysts: Evaluation of the effects of temperature, space velocity and reaction time

Schwengber, Carine Aline; Silva, Fernando Alves da; Schaffner, Rodolfo de Andrade; Fernandes-Machado, Nádia; Ferracin, Ricardo José; Bach, Vanessa Rossato; Alves, Helton José

doi:10.1016/j.jece.2016.07.001

Cited by 56 publications

(22 citation statements)

References 14 publications

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“…Methane dry reforming (MDR) and propane dry reforming (PDR) are both highly endothermic reactions: Δ H 300 K, MDR = 247 kJ/mol, Δ H 300 K, PDR = 620 kJ/mol, and require temperatures in the range of 600–900 °C (MDR) and between 550 and 700 °C (PDR) . Ni-based catalysts are generally used to perform dry reforming reactions with yields for CO between 60% and 80% depending on the support and the temperature range. , Here, for the preparation of the PDR and MDR catalysts, 10 wt % of Ni NPs, resulting from the decomposition of Ni(COD) 2 under hydrogen, have been impregnated on SiRAlOx-5.…”

Section: Results and Discussionmentioning

confidence: 99%

Tuning the Composition of FeCo Nanoparticle Heating Agents for Magnetically Induced Catalysis

Marbaix

Mille

Lacroix

et al. 2020

ACS Appl. Nano Mater.

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Magnetic heating by nanoparticles has recently been successfully employed in heterogeneous catalysis. In such processes, the maximum temperature that can be reached depends on the Curie temperature (T c) of the heating material. Here, in order to extend the range of accessible temperatures and consequently the range of possible reactions, to those requiring high temperatures, we developed and fully characterized a series of FeCo nanoparticles containing different concentrations of cobalt, in order to tune their magnetic properties and Tc. Their efficiency is compared to that of iron carbide nanoparticles, which display a lower Tc. Specific Absorption Rate (SAR) measurements as a function of temperature, performed using a homemade pyrometer-based setup, clearly show that, although the heating power of iron carbide nanoparticles is higher at room temperature, it decreases more rapidly with temperature than that of iron cobalt nanoparticles, in agreement with their lower Tc. In a showcase, Fe 0.5 Co 0.5 nanoparticles allow, in addition to CO 2 hydrogenation, dry reforming of propane and methane, and dehydrogenation of propane, these reactions requiring temperatures of 350°C, 600°C and 700°C respectively. Furthermore, the use of Fe 0.5 Co 0.5 nanoparticles is less energy demanding, as it allows carrying out CO 2 hydrogenation at lower magnetic fields and at frequencies as low as 100 kHz. Dry reforming of methane and propane were carried out in the presence of a Ni nanoparticle-based catalyst whereas dehydrogenation of propane required as a catalyst PtSn nanoparticles synthesized through an organometallic route. Fe 0.5 Co 0.5 nanoparticles can therefore be used as universal heating agents allowing performing reactions up to ca. 700°C upon association with the appropriate catalyst.

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Section: Results and Discussionmentioning

confidence: 99%

Tuning the Composition of FeCo Nanoparticle Heating Agents for Magnetically Induced Catalysis

Marbaix

Mille

Lacroix

et al. 2020

ACS Appl. Nano Mater.

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“…However, nickel based systems are also known to suffer from deactivation due to carbon formation [15,16] and metal particle sintering due to a lack of adequate thermal stability [17,18]. Apart from a loss of dispersion (which is detrimental to catalytic activity), sintering further aggravates carbon deposition, as large metal ensembles stimulate coke formation [19,20].…”

Section: Introductionmentioning

confidence: 99%

Investigating the correlation between deactivation and the carbon deposited on the surface of Ni/Al2O3 and Ni/La2O3-Al2O3 catalysts during the biogas reforming reaction

Charisiou

Tzounis

Sebastián

et al. 2019

Applied Surface Science

146

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catalysts were investigated for the biogas reforming reaction using CH 4 /CO 2 mixtures with minimal dilution. Stability tests at various reaction temperatures were conducted and TGA/DTG, Raman, STEM-HAADF, HR-TEM, XPS techniques were used to characterize the spent samples. Graphitized carbon allotrope structures, carbon nanotubes (CNTs) and amorphous carbon were formed on all samples. Metallic Ni 0 was recorded for all (XPS), whereas a strong peak corresponding to Ni 2 O 3 /NiAl 2 O 4 , was observed for the Ni/Al sample (650-750°C). Stability tests confirm that the Ni/LaAl catalyst deactivates at a more gradual rate and is more active and selective in comparison to the Ni/Al for all temperatures. The Ni/LaAl exhibits good durability in terms of conversion and selectivity, whereas the Ni/Al gradually loses its activity in CH 4 and CO 2 conversion, with a concomitant decrease of the H 2 and CO yield. It can be concluded that doping Al 2 O 3 with La 2 O 3 stabilizes the catalyst by (a) maintaining the Ni 0 phase during the reaction, due to higher dispersion and stronger active phase-support interactions, (b) leading to a less graphitic and more defective type of deposited carbon and (c) facilitating the deposited carbon gasification due to the enhanced CO 2 adsorption on its increased surface basic sites.

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“…According to previous reports, there is a consensus view that metal-support interaction (MSI) remarkably influence the catalytic performance of the DRM catalyst. Based on this, different metal oxides have been hired as supports for Ni-based DRM catalysts such as SiO 2 , 12 Al 2 O 3 , 13 TiO 2 , 11 CeO 2 , 14 ZrO 2 , 15 and La 2 O 3 . 12 Among them, La 2 O 3 received great interest ascribed to its parallel function as support and promoter, where it is capable to afford basic sites that enhance the adsorption of CO 2 via formation of La 2 O 2 CO 3 .…”

Section: Introductionmentioning

confidence: 99%

Solution combustion synthesis of Ni/La₂O₃ for dry reforming of methane: tuning the basicity via alkali and alkaline earth metal oxide promoters

et al. 2021

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Methane dry reforming using Ni/Al2O3 catalysts: Evaluation of the effects of temperature, space velocity and reaction time

Cited by 56 publications

References 14 publications

Tuning the Composition of FeCo Nanoparticle Heating Agents for Magnetically Induced Catalysis

Tuning the Composition of FeCo Nanoparticle Heating Agents for Magnetically Induced Catalysis

Investigating the correlation between deactivation and the carbon deposited on the surface of Ni/Al2O3 and Ni/La2O3-Al2O3 catalysts during the biogas reforming reaction

Solution combustion synthesis of Ni/La₂O₃ for dry reforming of methane: tuning the basicity via alkali and alkaline earth metal oxide promoters

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Methane dry reforming using Ni/Al2O3 catalysts: Evaluation of the effects of temperature, space velocity and reaction time

Cited by 56 publications

References 14 publications

Tuning the Composition of FeCo Nanoparticle Heating Agents for Magnetically Induced Catalysis

Tuning the Composition of FeCo Nanoparticle Heating Agents for Magnetically Induced Catalysis

Investigating the correlation between deactivation and the carbon deposited on the surface of Ni/Al2O3 and Ni/La2O3-Al2O3 catalysts during the biogas reforming reaction

Solution combustion synthesis of Ni/La2O3 for dry reforming of methane: tuning the basicity via alkali and alkaline earth metal oxide promoters

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Solution combustion synthesis of Ni/La₂O₃ for dry reforming of methane: tuning the basicity via alkali and alkaline earth metal oxide promoters