Multicomponent Ni-CeO2 nanocatalysts for syngas production from CO2/CH4 mixtures. (May 2018)

• Record Type: Journal Article
• Authors: le Saché, E.; Santos, J.L; Smith, T.J.; Centeno, M.A.; Arellano-Garcia, H.; Odriozola, J.A.; Reina, T.R.
• Is Part Of: Journal of CO₂ utilization. Volume 25(2018)
• Page Start: 68
• Page End: 78
• Publication Date: 2018-05
• Subjects: Syngas production -- CO2 utilisation -- Ni catalysts -- Cerium oxide -- Bimetallic catalysts; Carbon dioxide -- Periodicals; Carbon dioxide -- Environmental aspects -- Periodicals; Carbon dioxide mitigation -- Periodicals; Carbon dioxide; Carbon dioxide -- Environmental aspects; Carbon dioxide mitigation; Periodicals; 628.53205
• DOI: 10.1016/j.jcou.2018.03.012
• Languages: English
• ISSNs: 2212-9820

Abstract

Highlights: Chemical CO2 recycling via the dry reforming of methane. Comparison of bimetallic formulations Ni-Sn vs Ni-Pt. Influence of the promoters in the crystalline structure of the carbon deposits during dry reforming. Versatility on the syngas production H2 /CO ratio influenced by the catalysts composition. Abstract: The dry reforming of methane with CO2 is a common route to transform CO2 /CH4 mixtures into added value syngas. Ni based catalysts are highly active for this goal but suffer from deactivation, as such promoters need to be introduced to counteract this, and improve performance. In this study, mono- and bi-metallic formulations based on 10 wt.% Ni/CeO2 -Al2 O3 are explored and compared to a reference 10 wt.% Ni/γ-Al2 O3 . The effect of Sn and Pt as promoters of Ni/CeO2 -Al2 O3 was also investigated. The formulation promoted with Sn looked especially promising, showing CO2 conversions stabilising at 65% after highs of 95%. Its increased performance is attributed to the additional dispersion Sn promotion causes. Changes in the reaction conditions (space velocity and temperature) cement this idea, with the Ni-Sn/CeAl material performing superiorly to the mono-metallic material, showing less deactivation. However, in the long run it is noted that the mono-metallic Ni/CeAl performs better. As such the application is key when deciding which catalyst to employ in the dry reforming process.