| 초록 |
Hydrothermal deoxygenation in subcritical water is a promising route for producing n-paraffins from triglycerides without an external H2 source. In this study, bimetallic PtRe catalysts supported on various carbon supports were investigated for the hydrothermal deoxygenation of triglycerides. Bimetallic PtRe catalysts led to a markedly enhanced rate of both glycerol reforming for in situ H2 production and deoxygenation of fatty acids compared to monometallic Pt catalysts. Investigations with various carbon supports proved that a carbon support with low oxygen content (e.g., CNT) is desirable for supporting highly dispersed and well alloyed PtRe particles. Oxygen-rich carbon surfaces (e.g., activated carbons) caused the segregation of Re species into bulk particles with higher oxidation states. The PtRe/CNT catalyst showed the best performance, yielding 72 wt% n-paraffin for the hydrothermal deoxygenation of palm oil at 558 K without use of an external H2 source. |
