Chemical composition of raw and washed EFB
The structural and elemental compositions of raw EFB are summarized in Table 1. The composition of cellulose, hemicellulose and lignin in the raw EFB was similar to that of hardwood. Although the elemental composition of EFB was also similar with that of typical woody biomass, the sum of the contents of C, H, O and N amounted to only 90% probably due to its considerable contents of inorganic elements