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At least 271 records · Page 15
All sourcesNASA NTRSDOE OSTI
DOE OSTI2019

Impact of Ni and Mg Loadings on Dry Reforming Performance of Pt/Ceria-Zirconia Catalysts

The isolated effects of Ni and Mg on a series of Pt/Ce 0.6 Zr 0.4 O 2 (CZO) reforming catalysts were evaluated and used to formulate an improved catalyst with both Ni and Mg present. The dry reforming reaction results indicate that Ni enhances the CH 4 conversion at low temperatures while Mg improves the H 2 :CO ratio and stability, but requires high temperatures to reach similar conversions. The detection of coke (5.5 X 10 -4 g/g cat •h) over the 2.7Ni-CZO sample led to the examination of the 2.7Ni-0.50Mg-CZO sample. The catalyst activity results and the absence of coke formation over the 2.7Ni-0.50Mg-CZO sample confirmed that both Ni and Mg are needed to obtain a balance between catalyst activity and stability. The catalysts tested yielded low temperature activity with 10 % CH 4 conversions at temperature <500 °C. Furthermore, this work provides key insights into the proper design of low temperature reforming catalysts.

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