High performance of Mo-promoted Ir/SiO2 catalysts combined with HZSM-5 toward the conversion of cellulose to C5/C6 alkanes
2020
Jin, Lele | Li, Wenzhi | Liu, Qiying | Ma, Longlong | Hu, Zhao | Ogunbiyi, Ajibola T. | Wu, Mingwei | Zhang, Qi
In this study, the Mo-promoted Ir/SiO₂ (Ir-MoOₓ/SiO₂) catalysts combined with the zeolite HZSM-5 were used for the direct conversion of microcrystalline cellulose (MCC) to liquid fuel (C₅/C₆ alkanes) in n-dodecane/H₂O system. A synergistic effect was formed between the partially reduced MoOₓ species and the Ir particles, which effectively promoted the catalytic activity of Ir/SiO₂ catalyst. When the Mo/Ir molar ratio was 0.5, a high yield of C₅/C₆ alkanes (91.7%) was achieved at 210 ℃ for 12 h. In addition, the main component of C₅/C₆ alkanes was n-hexane, which was proven to be obtained by the hydrogenolysis of the key intermediate, sorbitol, formed from the hydrolysis and hydrogenation of MCC.
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