Tailored monolith supports for improved ultra-low temperature water-gas shift reaction

Portela R, Wolf P, Marinkovic JM, Serrano-Lotina A, Riisager A, Haumann M (2021)

Publication Type: Journal article

Publication year: 2021


DOI: 10.1039/d1re00226k


Supported ionic liquid-phase (SILP) particulate catalysts consisting of Ru-complexes dissolved in an ionic liquid that is dispersed on a gamma-alumina porous substrate facilitate the water-gas shift (WGS) reaction at ultra-low temperatures. In this work, a screening of different ceramic support materials was performed to design a suitable monolithic support to disperse the SILP system with the objective of scaling up the WGS process efficiently. gamma-Alumina-rich channeled monoliths were developed with the use of natural clays as binders (10 wt% bentonite and 20 wt% sepiolite) with the following properties: i) high volume of mesopores to maximize the catalyst loading and successfully immobilize the ionic liquid-catalyst system via capillary forces, ii) mechanical resistance to withstand the impregnation process and the reaction operating conditions, and iii) surface chemistry compatible with a highly active and selective phase for WGS. The developed monolithic-SILP catalyst demonstrated high stability and long-term WGS performance at 130 degrees C with an average steady-state CO conversion of around 30% after 190 h time-on-stream (TOS) and a conversion of 23% after 320 h TOS. Interestingly, the catalyst activity proved essentially unaffected by variation in the water partial pressure during operation due to accumulation of water in the monolith, thus making the system highly durable.

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Portela, R., Wolf, P., Marinkovic, J.M., Serrano-Lotina, A., Riisager, A., & Haumann, M. (2021). Tailored monolith supports for improved ultra-low temperature water-gas shift reaction. Reaction Chemistry & Engineering. https://doi.org/10.1039/d1re00226k


Portela, Raquel, et al. "Tailored monolith supports for improved ultra-low temperature water-gas shift reaction." Reaction Chemistry & Engineering (2021).

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