H2-rich syngas production from biogas reforming: Overcoming coking and sintering using bimetallic Ni-based catalysts

• Published in: International journal of hydrogen energy Vol. 48; no. 72; pp. 27907 - 27917
• Main Authors: Carrasco-Ruiz, S., Zhang, Q., Gándara-Loe, J., Pastor-Pérez, L., Odriozola, J.A., Reina, T.R., Bobadilla, L.F.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 22.08.2023
• Subjects: Coking resistance; Dry reforming; H2-rich syngas; Ni–Rh catalyst; Dry reforming; H2-rich syngas; Coking resistance; Ni–Rh catalyst
• ISSN: 0360-3199; 1879-3487
• DOI: 10.1016/j.ijhydene.2023.03.301

Dry reforming of methane is a very appealing catalytic route biogas (mainly composed by greenhouse gases: carbon dioxide and methane) conversion into added value syngas, which could be further upgraded to produce liquid fuels and added value chemicals. However, the major culprits of this reaction are coking and active phase sintering that result in catalysts deactivation. Herein we have developed a highly stable bimetallic Ni–Rh catalyst supported on mixed CeO2–Al2O3 oxide using low-noble metal loadings. The addition of small amounts of rhodium to nickel catalysts prevents coke formation and improves sintering resistance, achieving high conversions over extended reaction times hence resulting in promising catalysts for biogas upgrading. [Display omitted] •H2-rich syngas can be obtained efficiently from biogas reforming.•Ni-based catalysts are deactivated by metal sintering and coke deposition.•Doping with low Rh loadings deactivation can be successfully prevented.