Abstract
With the goal of contributing to the valorization of lignocellulosic biomass, we investigated the conversion of Japanese cedar and bagasse into aromatic monomers over charcoal-supported metal catalysts in supercritical water. Over Ru/C, Japanese cedar was converted into gaseous products such as methane and carbon dioxide. Pd/C, Pt/C, and Rh/C were active for the conversion of Japanese cedar into aromatic monomers, and the monomer yields over these catalysts decreased in the order Pt/C > Rh/C > Pd/C when the conversion reaction was carried out at 673 K for 1 h. Bagasse, an herbaceous biomass, could also be converted into aromatic monomers by reaction over Pt/C, Rh/C, or Pd/C at 673 K for 1 h. Catalyst reusability experiments revealed that the activities of Pt/C and Rh/C for Japanese cedar conversion increased with reuse, up until the third reuse.
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