Effect of noble metal addition over active Ru/TiO2 catalyst for CO selective methanation from H2 rich-streams

• DOI: 10.1016/j.ijhydene.2022.07.072
• Publication Date: 2022-08-11T03:12:13Z
• Authors: L.F. Bobadilla; A. Muñoz-Murillo; J. Gándara-Loe; A. Pérez; O.H. Laguna; L.M. Martínez T; A. Penkova; M.A. Centeno; J.A. Odriozola
• Keywords: H2 purification; CO selective methanation; Ru-based catalyst; Noble metals addition; 02 engineering and technology; http://vocabularies.unesco.org/thesaurus/concept640; 0210 nano-technology; 01 natural sciences; 0104 chemical sciences

Selective CO methanation from H2-rich stream has been regarded as a promising route for deep removal of low CO concentration and catalytic hydrogen purification processes. This work is focused on the development of more efficient catalysts applied in practical conditions. For this purpose, we prepared a series of catalysts based on Ru supported over titania and promoted with small amounts of Rh and Pt. Characterization details revealed that Rh and Pt modify the electronic properties of Ru. The results of catalytic activity showed that Pt has a negative effect since it promotes the reverse water gas shift reaction decreasing the selectivity of methanation but Rh increases remarkably the activity and selectivity of CO methanation. The obtained results suggest that RuRh-based catalyst could become important for the treatment of industrial-volume streams.<br/>Junta de Andalucía US-1263288<br/>Ministerio de Ciencia e Innovación RTI2018-096294-B-C3<br/>