Nickel ferrite spinel as catalyst precursor in the dry reforming of methane: Synthesis, characterization and catalytic properties

Benrabaa, Rafik; Boukhlouf, Hamza; Löfberg, Axel; Rubbens, Annick; Vannier, Rose‐Noëlle; Bordes‐Richard, Elisabeth; Barama, Akila

doi:10.1016/s1003-9953(11)60408-8

Cited by 100 publications

(67 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…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

View full text Add to dashboard Cite

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.

show abstract

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

View full text Add to dashboard Cite

show abstract

“…Moreover, they can be employed as magnetic catalysts or catalyst supports which facilitate magnetic separation [1]. The use of nanostructured magnetic materials for radiofrequency heating (RF) and magnetic separation within a chemical reactor provides a novel process intensified platform for system integration [2].…”

Section: Introductionmentioning

confidence: 99%

Effect of Pr3+ substitution on the microstructure, specific surface area, magnetic properties and specific heating rate of Ni0.5Zn0.5Pr Fe2−O4 nanoparticles synthesized via sol–gel method

Yan

Gao

et al. 2015

Journal of Alloys and Compounds

View full text Add to dashboard Cite

xia. (2015) Effect of Pr3+ substitution on the microstructure, specific surface area, magnetic properties and specific heating rate of Ni0.5Zn0.5PrxFe2−xO4 nanoparticles synthesized via sol-gel method. Journal of Alloys and Compounds,. Permanent WRAP URL:http://wrap.warwick.ac.uk/94091 Copyright and reuse:The Warwick Research Archive Portal (WRAP) makes this work by researchers of the University of Warwick available open access under the following conditions. Copyright © and all moral rights to the version of the paper presented here belong to the individual author(s) and/or other copyright owners. To the extent reasonable and practicable the material made available in WRAP has been checked for eligibility before being made available.Copies of full items can be used for personal research or study, educational, or not-for-profit purposes without prior permission or charge. Provided that the authors, title and full bibliographic details are credited, a hyperlink and/or URL is given for the original metadata page and the content is not changed in any way. A note on versions:The version presented here may differ from the published version or, version of record, if you wish to cite this item you are advised to consult the publisher's version. Please see the 'permanent WRAP url' above for details on accessing the published version and note that access may require a subscription. Abstract: A series of Ni-Zn ferrite nanoparticles with a nominal composition of Ni0.5Zn0.5Prx Fe2-xO4 (x=0.000 -0.100 with steps of 0.025) has been synthesized by a sol-gel method. The effect of composition and calcination temperature on the morphology, specific surface area, magnetic properties and specific heating rate has been studied. The Ni-Zn-Pr ferrites have a single spinel (NZF) phase at Pr loadings below 5 at%. A minor amount of an orthorhombic PrFeO3 phase is present in the Ni-Zn-Pr ferrites at Pr loadings above 5 at%. At a Pr loading of 10 at%, the specific surface area increases six-fold as compared to that of the non-doped Ni0.5Zn0.5Fe2O4 sample. As the Pr loading increases, the saturation magnetization, remnant magnetization and coercivity increase and reach the maximum at x = 0.05 and then decrease. The maximum values of these parameters are 67.0 emu/g, 9.7 emu/g and 87.2Oe, respectively. Under radiofrequency field (frequency: 295 kHz, intensity: 500 Oe), the highest heating rate of 1.65 K/s was observed over the sample with x = 0.025 which is 2.5 times higher than that of Ni0.5Zn0.5Fe2O4.

show abstract

“…Spinel NiFe 2 O 4 , one of the most important ferrite materials, has been widely studied because of its application in many fields, such as ferrofluids, catalysts, microwave devices, gas sensors, magnetic materials, and so on [1][2][3][4][5][6][7]. NiFe 2 O 4 is an inverse spinel in which a unit cell consists of 8 NiFe 2 O 4 molecules.…”

Section: Introductionmentioning

confidence: 99%

Structural and magnetic properties of nickel ferrite nanoparticles synthesized via a template-assisted sol–gel method

Sun

Gao

et al. 2014

Ceramics International

View full text Add to dashboard Cite

Nickel ferrite spinel as catalyst precursor in the dry reforming of methane: Synthesis, characterization and catalytic properties

Cited by 100 publications

References 41 publications

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

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

Effect of Pr3+ substitution on the microstructure, specific surface area, magnetic properties and specific heating rate of Ni0.5Zn0.5Pr Fe2−O4 nanoparticles synthesized via sol–gel method

Structural and magnetic properties of nickel ferrite nanoparticles synthesized via a template-assisted sol–gel method

Contact Info

Product

Resources

About