Ni–Co Bimetallic Catalysts for Hydrogen Production by Steam Reforming Ethanol

Ni–Co Bimetallic Catalysts for Hydrogen Production by Steam Reforming Ethanol

Ni–Co catalysts supported on MgAl 2 O 4 –CeO 2 were prepared by the sol–gel method. The solids were calcined under a reducing atmosphere to obtain Ni and/or Co active sites. The influence of the cobalt content (1, 3 and 5% w/w) was studied on bimetallic catalysts containing 8% w/w of Ni. The catalys...

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Bibliographic Details
Published in:Topics in catalysis Vol. 65; no. 13-16; pp. 1427 - 1439
Main Authors: Romero C., Leticia, Moreno, M. Sergio, Galetti, Agustín E., Barroso, Mariana N.
Format: Journal Article
Language:English
Published: New York Springer US 01-09-2022
Springer Nature B.V
Subjects:
Bimetals
Catalysis
Catalysts
Catalytic activity
Cerium oxides
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Cobalt
Crystallites
Ethanol
Hydrogen production
Industrial Chemistry/Chemical Engineering
Original Paper
Pharmacy
Physical Chemistry
Reaction products
Reforming
Selectivity
Sol-gel processes
Bimetallic catalysts
Sol–gel method
Hydrogen
Ce–MgAl
Ni–Co
O
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Summary:Ni–Co catalysts supported on MgAl 2 O 4 –CeO 2 were prepared by the sol–gel method. The solids were calcined under a reducing atmosphere to obtain Ni and/or Co active sites. The influence of the cobalt content (1, 3 and 5% w/w) was studied on bimetallic catalysts containing 8% w/w of Ni. The catalysts were characterized by TG, FTIR, S BET , AAS, XRD, TPR, TEM, EELS, EFTEM, TPO and SEM. XRD patterns of the reduced samples did not reveal the presence of Ni nor Co, nor the possible formation of a metallic alloy, which suggests that metallic crystallite sizes are smaller than the detection limit of the technique (5 nm). The catalysts were evaluated in the ethanol steam reforming reaction at 650 °C for 7 h. The results showed that the catalytic activity and the H 2 selectivity are favored in bimetallic catalysts. The main reaction products were H 2 , CO 2 , CO and, to a lesser amount, CH 4 , being the hydrogen selectivity being greater than 80%. The best behavior in terms of the activity, stability and tolerance to carbon deposition was observed in Co 3 Ni/MC system. These results suggest the existence of an optimal Co/Ni ratio in the sample whit 3 wt% Co and 8 wt% Ni.
ISSN:1022-5528
1572-9028
DOI:10.1007/s11244-022-01632-3