Integral valorization of tagasaste (Chamaecytisus proliferus) under hydrothermal and pulp processing
2010
Alfaro, José Félix | López, F. | Perez, A. | García, J.C. | Fernandez, Aurelio Rodriguez
Tagasaste wood (Chamaecytisus proliferus L.F. ssp palmensis) was characterized, chemical and energy terms, and assessed its potential as a lignocellulosic raw material, and its integral fractionation by autohydrolysis and delignification with ethanol. The hydrothermal treatment of the raw material at 175-185°C provided a liquor containing a substantially increased amount of oligomers (between 16.6% and 47.4% as percentages with respect to the content of the raw material in each polymer fraction). A cellulose pulp with autohydrolysis treatment increased yields (53-60%), reduced Kappa number (28.8-34.6) but also viscosity (755-857mL/g), and decreased paper strength (2.97-5.22kNm/kg). However, beating ethanol cellulose from tagasaste was found to improve its strength-related properties more markedly than in soda pulp from the same material (tensile index of 44kNm/kg).
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