| Summary: | 碩士 === 國防大學中正理工學院 === 應用化學研究所 === 96 === In this study, PtRuNax/ZrO2 and PtRu/NaxZrO2 and PtRuKx/ZrO2 has been prepared by the incipient wetness impregnation method. The particle sizes and structures of catalysts were physically characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM).The technique of temperature programmed reduction (TPR) was used to explore the reductive behavior of catalysts and studied the interaction between sodium and zirconium oxide and PtRu alloy varied with oxidative temperature. Evaluation of catalytic activities and product on oxidative steam reforming of ethanol(OSRE).We expected to reduce carbon monoxide in the product and understand the mechanism of OSRE over PtRuNax/ZrO2 and PtRu/NaxZrO2 catalysts.
The results of active test confirmed that the modified PtRu/ZrO2 catalyst with Na (or K) can decrease the distribution of CO via water gas shift reaction (WGSR). The PtRuNax/ZrO2 catalyst is easier than the PtRu/NaxZrO2 catalyst to favored the steam reforming of methyl. The PtRuNa0.25/ZrO2 catalyst was the best than other. Under 320 ℃, H2O/EtOH = 4.86 and O2/EtOH = 0.26, the yield of hydrogen(YH2) approached 3.8 and low selectivity of CO (SCO = 0 %). Stability test for 5 day time-on-stream revealed that the catalyst did not show deactivation(CEtOH = 100 ％, YH2 = 3.2), and on remarkable carbon deposition was observed.
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