Highly active and coke-resistant Rh catalysts were developed for methane steam reforming in microchannel chemical reactors. Rh loading was optimized on a stable MgO-Al2O3 support to improve the volumetric productivity for methane conversion. Catalyst activities were stable over a wide range of steam/carbon ratios. In particular, experimental results demonstrated that Rh/MgO-Al2O3 catalysts are extremely active for methane steam reforming and are resistant to coke formation at stoichiometric steam/carbon ratio of 1 for over 14 hours time-on-stream with no sign of deactivation. Methane steam reforming activities on this catalyst is compared in both a microchannel reactor and a conventional microtubular reactor. Significantly enhanced performances were observed in microchannel reactors owing to improved heat and mass transfer.
Revised: January 23, 2006 |
Published: December 14, 2004
Citation
Wang Y., Y. Chin, R.T. Rozmiarek, B.R. Johnson, Y. Gao, J.M. Watson, and A.Y. Tonkovich, et al. 2004.Highly Active and Stable Rh/MgO-AI2O3 Catalysts for Methane Steam Reforming.Catalysis Today 98, no. 4:575-581.PNNL-SA-43442.