Ni-based catalysts to produce synthesis gas by combined reforming of clean biogas

Ni-based catalysts to produce synthesis gas by combined reforming of clean biogas

[Display omitted] •The Steam/Dry reforming process can better valorise the clean biogas to produce syngas.•Ni-Rh/Mg/Al catalysts are highly stable and active in the reaction.•The dispersion of the active phase and its interaction with the support play a key role in the catalytic performances.•Carbon...

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Bibliographic Details
Published in:Applied catalysis. A, General Vol. 582; p. 117087
Main Authors: Schiaroli, N., Lucarelli, C., Sanghez de Luna, G., Fornasari, G., Vaccari, A.
Format: Journal Article
Language:English
Published: Amsterdam Elsevier B.V 25-07-2019
Elsevier Science SA
Subjects:
Biogas
Carbon dioxide
Catalysis
Catalysts
Deactivation
Direct reduction
Dry reforming
Ni-based catalysts
Phase stability
Reforming
Rhodium
Solid solutions
Steam reforming
Syngas
Synthesis gas
Dry reforming
Biogas
Steam reforming
Ni-based catalysts
Syngas
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Summary:[Display omitted] •The Steam/Dry reforming process can better valorise the clean biogas to produce syngas.•Ni-Rh/Mg/Al catalysts are highly stable and active in the reaction.•The dispersion of the active phase and its interaction with the support play a key role in the catalytic performances.•Carbon deposition is reduced in the Steam/Dry reforming conditions. Ni-based catalysts promoted by Rh were prepared from hydrotalcite-type (Ht) precursors and employed in Dry Reforming (DR) and combined Steam/Dry Reforming (S/DR) of clean biogas (CB, an equimolar mixture of CH4 and CO2) to produce syngas suitable for Fischer-Tropsch or methanol synthesis. The structure of the catalysts before and after reaction were thoroughly characterized by XRD, H2-TPR, CO2-TPD, Raman, TG and TEM techniques. The DR results showed that the addition of a small amount of Rh increased the CO2 conversion and significantly decreased the carbon formation. The addition of steam to the feed to perform the combined S/DR reaction promoted the catalyst activity further by improving its resistance to carbon deposition and therefore of minimising deactivation. XRD and TPR analyses showed that an increase of the amount of Mg in the catalytic formulation, improve the active phase stability through the formation of MgO-NiO solid solution by calcination.
ISSN:0926-860X
1873-3875
DOI:10.1016/j.apcata.2019.05.021