Ni supported on Fe-doped MgAl2O4 for dry reforming of methane: Use of factorial design to optimize H2 yield

Medeiros, Rodolfo L.B.A.; Macedo, Heloísa P.; Melo, Valci; Oliveira, Ângelo A.S.; Barros, Joana M. F.; Melo, M. A. F.; Melo, D. M. A.

doi:10.1016/j.ijhydene.2016.06.246

Cited by 47 publications

(24 citation statements)

References 42 publications

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“…This is due to the surface diffusion phenomena that can activate and promote neck-forming sintering between calcined particles above 900 ºC 19 . This result showed that the MgAl 2 O 4 powders prepared by the gelatin method can be used as catalysts supports in the range of 700 and 900 ºC 5,[20][21][22] without any major modifications in the crystallite size.…”

Section: Resultsmentioning

confidence: 86%

“…It is well known and studied in the area of ceramic materials since it presents a potential combination of mechanical, physical and chemical properties 1,2 . Thus, MgAl 2 O 4 is widely required for several industrial applications and has recently been used as a support in the preparation of heterogeneous catalysts 3,4 , mainly those used in strongly endothermic reactions such as dry reforming of methane 3,[5][6][7] .…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of MgAl2O4 by Gelatin Method: Effect of Temperature and Time of Calcination in Crystalline Structure

et al. 2017

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Magnesium aluminate can be obtained by the methods: ceramic method, sol-gel, co-precipitation, hydrothermal and combustion. However, this work presents a simple and low cost route to obtain MgAl 2 O 4 through the gelatin method. The main objective was to use gelatin as an organic precursor and to verify the influence of temperature and time of calcination on the structural and morphological properties of obtained materials. Al and Mg nitrates were used as metal precursors with Al/Mg = 2 ratio. Samples were calcined as follows: 700 ºC, 900 ºC and 1100 ºC during 2 and 4 h. The powders were characterized by TGA, XRD and SEM. A single phase material with a crystallinity of 39.18-90.40% and crystallite size in the range of 12.4 to 55.5 nm was obtained. The materials exhibited morphology in the form of plates and small agglomerates. It was found that increasing temperature and time of calcination favored the growth of crystallites and increased crystallinity.

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Section: Resultsmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Synthesis of MgAl2O4 by Gelatin Method: Effect of Temperature and Time of Calcination in Crystalline Structure

et al. 2017

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“…Catalysts 2020, x FOR PEER REVIEW 5 of 13 iron were clearly observed from 220 to 700 °C, which corresponded to the oxidation states of Fe 3+ to Fe 2+ , Fe 2+ to Fe + , and Fe + to Fe 0 . At temperatures above 700 °C, the species strongly linked to the MgAl support [36,39]. The TPR-H2 profile of the solid with only nickel as active metal (NiFe (1:0)) indicated that the presence of Mg 2+ and Al 3+ ions induced a decrease in the reducibility of Ni 2+ [40,41].…”

Section: Catalysts 2020 X For Peer Review 4 Of 13mentioning

confidence: 99%

“…Two zones of reducibility for iron were clearly observed from 220 to 700 • C, which corresponded to the oxidation states of Fe 3+ to Fe 2+ , Fe 2+ to Fe + , and Fe + to Fe 0 . At temperatures above 700 • C, the species strongly linked to the MgAl support [36,39].…”

Section: Catalysts 2020 X For Peer Review 4 Of 13mentioning

confidence: 99%

Influence of the Active Phase (Fe, Ni, and Ni–Fe) of Mixed Oxides in CWAO of Crystal Violet

et al. 2020

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The catalytic oxidation of aqueous crystal violet (CV) solutions was investigated using Ni and Fe catalysts supported over Mg–Al oxides synthesized by the autocombustion method. The influence of temperature, loading, and selectivity were studied in the catalytic wet air oxidation (CWAO) of CV. The kind of metal had an important contribution in the redox process as significant differences were observed between Fe, Ni, and their mixtures. The catalysts with only Fe as active phase were more efficient for the oxidation of CV under normal conditions (T = 25 °C and atmospheric pressure) compared to those containing Ni, revealing the influence of the transition metal on catalytic properties. It was found that iron-containing materials displayed enhanced textural properties. The synthesis of Fe/MgAl catalysts by the autocombustion method led to solids with excellent catalytic behavior, 100% CV degradation in eight hours of reaction, 68% selectivity to CO2, and significant reduction of chemical oxygen demand (COD).

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“…In recent years, synthesis gas (a mixture of H 2 and CO) production received more attention because it can be used as feedstock for production of oxygenated hydrocarbons such as methanol and Fischer-Tropsch synthesis [1][2][3][4][5]. Dry reforming of methane is one of the methods to produce extremely valuable syngas with a suitable H 2 /CO ratio around 1, by utilization of harmful greenhouse gasses (CO 2 and CH 4 ) [6,7].…”

Section: Introductionmentioning

confidence: 99%

Effects of alkaline earth promoters on the catalytic performance of the nickel catalysts supported on high surface area mesoporous magnesium silicate in dry reforming reaction

Ghods

Meshkani

Rezaei

2016

International Journal of Hydrogen Energy

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Ni supported on Fe-doped MgAl2O4 for dry reforming of methane: Use of factorial design to optimize H2 yield

Cited by 47 publications

References 42 publications

Synthesis of MgAl2O4 by Gelatin Method: Effect of Temperature and Time of Calcination in Crystalline Structure

Synthesis of MgAl2O4 by Gelatin Method: Effect of Temperature and Time of Calcination in Crystalline Structure

Influence of the Active Phase (Fe, Ni, and Ni–Fe) of Mixed Oxides in CWAO of Crystal Violet

Effects of alkaline earth promoters on the catalytic performance of the nickel catalysts supported on high surface area mesoporous magnesium silicate in dry reforming reaction

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