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Title: Low Temperature Dry Reforming of Methane Using Ru-Ni-Mg/Ceria-Zirconia Catalysts: Effect of Ru Loading and Reduction Temperature

Journal Article · · Applied Catalysis A: General

Dry reforming catalysts, especially those with activity at moderate temperatures, have been intensely investigated to enhance the conversion of biogas. Here, Ru is evaluated as a promoter for Ni-Mg based catalysts. Catalysts based on 1.4 wt%Ni-1.0 wt%Mg-Ce0.6Zr0.4O2 with Ru (0.02-0.32 wt%) were prepared using incipient wetness. The reducibility of the catalysts and conversions increased with increasing Ru content. Increases in conversions with increasing Ru loading was attributed to the additional active sites and synergistic effect between Ru and Ni, which weakened Ni-Mg interactions. Samples showed dry reforming activity at low temperatures (450-510 degrees C). Reaction rates and activation energies of higher loading Ru samples (1.4 wt%Ni-1.0 wt%Mg/Ce0.6Zr0.4 O2 with 0.16 and 0.32 wt%Ru) decreased when the reduction temperature was raised from 300 to 400 degrees C. A 20 h TOS study showed stable catalytic activity with minimal coke deposition. The results suggest that Ru is an alternative to Pt in promoting low temperature dry reforming of methane.

Research Organization:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Sustainable Transportation Office. Bioenergy Technologies Office
DOE Contract Number:
Report Number(s):
NREL/JA-5100-82918; MainId:83691; UUID:7238e38f-cb37-46a9-8986-193ee08f86b9; MainAdminID:65482
Journal Information:
Applied Catalysis A: General, Vol. 645
Country of Publication:
United States

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