Effects of Partial Substitution of Ni by Cu in LaNiO3 Perovskite Catalyst for Dry Methane Reforming

Moradi, Gholamreza; Khosravian, F.; Rahmanzadeh, M.

doi:10.1016/s1872-2067(11)60378-1

Cited by 79 publications

(44 citation statements)

References 20 publications

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“…The intensity of the second peak equals to twice that of the first peak indicating the formation of LaNiO 3 . [26][27][28][29] The appearance of the second zone peak between 600 and 800 • C in the catalysts demonstrates the interaction of the Ni with the trimetallic perovskite phase indirectly pointing to the stability of the perovskite. 19,25,30 It can be clearly noted from the figure that the high-temperature peak shifted to its right when compared to that in the inset LaNiO 3 , indicating the formation of trimetallic perovskite phase.…”

Section: Temperature Programmed Reductionmentioning

confidence: 92%

Syngas production by $$\hbox {CO}_{2}$$ CO 2 reforming of methane on $$\hbox {LaNi}_{\mathrm{x}}\hbox {Al}_{1-\mathrm{x}}\hbox {O}_{3}$$ LaNi x Al 1 - x O 3 perovskite catalysts: influence of method of preparation

et al. 2017

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Two series of LaNi x Al 1−x O 3 catalysts (0 ≤ x ≤ 1) were prepared by hydrothermal and sol-gel methods and characterized by X-ray diffraction (XRD), BET surface area, Temperature programmed reduction (TPR) and Fourier-transform infrared spectroscopy (FT-IR) techniques. The performance of these catalysts was studied for CO 2 reforming of methane (also called dry reforming of methane, DRM) at atmospheric pressure and in the temperature range of 600−800 • C, maintaining a space velocity of 28,800 h −1. Catalysts containing trimetallic perovskite showed higher CH 4 and CO 2 conversions than the bimetallic perovskite, due to the strong interaction of Ni with the former. Strong interaction increased the reduction temperature of the active species and reduced the sintering of metallic particles. At 800 • C, the sol-gel catalysts reached their maximum activity in terms of both CH 4 and CO 2 conversions at x = 0.3, whereas the same for hydrothermal catalysts required a Ni ratio x = 0.6. The trimetallic perovskite formation was responsible for the catalyst stability. A comparison of the best catalysts from the two series revealed that the hydrothermal catalysts exhibited a slightly better performance during the time on stream analysis. The results are interpreted in terms of changes in the physicochemical properties of the catalysts.

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Section: Temperature Programmed Reductionmentioning

confidence: 92%

Syngas production by $$\hbox {CO}_{2}$$ CO 2 reforming of methane on $$\hbox {LaNi}_{\mathrm{x}}\hbox {Al}_{1-\mathrm{x}}\hbox {O}_{3}$$ LaNi x Al 1 - x O 3 perovskite catalysts: influence of method of preparation

et al. 2017

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“…LaNiO 3 are considered suitable alternative for conventional Ni‐based catalysts in methane reforming reaction because of its well dispersed metallic particles, high catalytic activity, increase in hydrogen formation, stability under various operating conditions and prevention coke deposition . LaNiO 3 perovskite has been widely used in dry reforming of methane by different scholars, while the perovskite type was seldom studied for SMR . LaNiO 3 perovskite‐type oxide was prepared by using a spray pyrolysis method for SMR reaction .…”

Section: Introductionmentioning

confidence: 99%

“…A remarkable effort performed to examine kinetic models of SMR since the 1950s . The kinetic models of SMR reaction have been suggested over various ranges of temperature and pressure . The first kinetic model for SMR was proposed over a reduced nickel catalyst in the temperature range of 336°C‐638°C assuming the surface decomposition of methane is the rate determining step .…”

Section: Introductionmentioning

confidence: 99%

Steam methane reforming on LaNiO ₃ perovskite‐type oxide for syngas production, activity tests, and kinetic modeling

Mosayebi

Nasabi

2020

Int J Energy Res

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The kinetic experiments at various working conditions (ie, temperature: 500 C-900 C, pressure: 1-15 bar, H 2 O/CH 4 ratio [S/C ratio] of 1-2.5, and gas hourly space velocity of 900-1700 1/h) in the presence of LaNiO 3 perovskitetype oxide were done to consider and assess the outcome of steam methane reforming (SMR) and to build up its kinetic models depending on Langmuir-Hinshelwood method in a fixed bed reactor. The outcomes demonstrate, the methane conversion, H 2 and CO yields and formed CO 2 are affected by the working parameters. Elevated temperature is profitable for more methane conversion, H 2 and CO yield. While high temperature has a negative effect on mol % of CO 2 in outlet products. The high working pressure will not profit SMR respect to CH 4 conversion and products distribution. The efficacy of S/C ratio on the CH 4 conversion and CO yield depended on temperature range. H 2 yield considerably diminishes with an increment in S/C ratio, while the trend was reverse for CO 2 value in outlet gas. The accuracy of suggested kinetic model was evaluated by correlation and statistical tests. Outcomes exhibited that the obtained data were well anticipated through the suggested model, owning to presumption of nonideal gas phase and by utilizing reasonable equation of state of PPR78. K E Y W O R D S CH 4 conversion, H 2 and CO yields, kinetic model, LaNiO 3 perovskite-type oxide, steam methane reforming

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“…The incorporation of Ni 2? ions within well-defined structures, such as perovskites [10,11] and spinels [12], was also shown to increase the activity and catalytic stability via inhibiting the formation of carbon in DRM reactions. Other previously studied catalytic systems, such as those derived from layered double hydroxides (LDHs) that contain large surface areas, can result in the formation of homogeneous mixture of oxides with small crystal sizes.…”

Section: Introductionmentioning

confidence: 99%

Effect of the Ni/Al ratio of hydrotalcite-type catalysts on their performance in the methane dry reforming process

et al. 2015

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Hydrotalcite-type solids of the form NiAl-R, where R refers to the ratio of Ni to Al (R = 2, 3, 5, 8, and 10), were successfully synthesized following co-precipitation method at pH = 12. The obtained solids were calcined at 800°C, except for NiAl-R 2 where calcination was performed at temperatures ranging between 300 and 800°C. Following calcination, the resulting materials were evaluated for their catalytic activity and stability during the process of dry reforming of methane. Factors affecting the catalytic activity of the obtained materials such as the ratio R and calcination temperature were also studied. Prior to calcination, X-ray diffraction analyses clearly illustrated the typical hydrotalcite structure of the synthesized materials (when R B 5). On the other hand, calcination at various temperatures prompted decomposition of all solids to form NiO, with exception to NiAl-R 2 , which upon calcinations at 800°C was decomposed to form NiO and a second phase spinel containing NiAl 2 O 4 . The chemical composition of the obtained solids was determined by atomic absorption spectroscopy. Further characterization was performed using several techniques, including: surface area measurements (S BET ), scanning electron microscopy, Fourier transform infrared spectroscopy and thermogravimetric analysis. The reducibility of nickel species was studied via temperatureprogrammed reduction. The catalytic performance of the asprepared samples was studied for dry reforming of methane under atmospheric pressure at temperatures ranging between 400 and 700°C. The catalytic activity of the designed substances highlighted the importance of molar ratios i.e. Ni 2? / Al 3? on the success of the overall dry reforming of methane process. The catalytic activity of the synthesized materials was also found to be directly proportional to the ratio of Ni/ Al as well as the calcination temperature, with exception to NiAl-R 2 which was found to exhibit the highest activity of all. The latter observation was perhaps associated with the lower size of the crystalline particles in conjunction with the presence of a second phase containing NiAl 2 O 4 . In this study, it is shown that the calcination temperature has a significant effect on the catalytic property and the crystallite size of the metal.

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Effects of Partial Substitution of Ni by Cu in LaNiO3 Perovskite Catalyst for Dry Methane Reforming

Cited by 79 publications

References 20 publications

Syngas production by $$\hbox {CO}_{2}$$ CO 2 reforming of methane on $$\hbox {LaNi}_{\mathrm{x}}\hbox {Al}_{1-\mathrm{x}}\hbox {O}_{3}$$ LaNi x Al 1 - x O 3 perovskite catalysts: influence of method of preparation

Syngas production by $$\hbox {CO}_{2}$$ CO 2 reforming of methane on $$\hbox {LaNi}_{\mathrm{x}}\hbox {Al}_{1-\mathrm{x}}\hbox {O}_{3}$$ LaNi x Al 1 - x O 3 perovskite catalysts: influence of method of preparation

Steam methane reforming on LaNiO ₃ perovskite‐type oxide for syngas production, activity tests, and kinetic modeling

Effect of the Ni/Al ratio of hydrotalcite-type catalysts on their performance in the methane dry reforming process

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Effects of Partial Substitution of Ni by Cu in LaNiO3 Perovskite Catalyst for Dry Methane Reforming

Cited by 79 publications

References 20 publications

Syngas production by $$\hbox {CO}_{2}$$ CO 2 reforming of methane on $$\hbox {LaNi}_{\mathrm{x}}\hbox {Al}_{1-\mathrm{x}}\hbox {O}_{3}$$ LaNi x Al 1 - x O 3 perovskite catalysts: influence of method of preparation

Syngas production by $$\hbox {CO}_{2}$$ CO 2 reforming of methane on $$\hbox {LaNi}_{\mathrm{x}}\hbox {Al}_{1-\mathrm{x}}\hbox {O}_{3}$$ LaNi x Al 1 - x O 3 perovskite catalysts: influence of method of preparation

Steam methane reforming on LaNiO 3 perovskite‐type oxide for syngas production, activity tests, and kinetic modeling

Effect of the Ni/Al ratio of hydrotalcite-type catalysts on their performance in the methane dry reforming process

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Steam methane reforming on LaNiO ₃ perovskite‐type oxide for syngas production, activity tests, and kinetic modeling