Brazilian Journal of Chemical Engineering - Biopitch produced from eucalyptus wood pyrolysis liquids as a renewable binder for carbon electrode manufa

Brazilian Journal of Chemical Engineering - Biopitch produced from eucalyptus wood pyrolysis liquids as a renewable binder for carbon electrode manufacture: "The eucalyptus wood bio-oil used in this study was produced by slow pyrolysis in a continuous retort. It is insoluble in water and had previously been separated from the acidic aqueous phase by decantation. It has a density of 1.163 g.cm-3, a higher heating value of 21.3 MJ.kg-1 (5,100 kcal.kg-1), a viscosity of 43.5 cP at 40oC, a pH of 2.75 at 25oC and a humidity of 15% (Rezende et al., 1994).

Heat treatment of the bio-oil was carried out in the equipment shown in Figure 1, a 10-liter bench distiller/polymerizer. It consists of a resistively heated and well-swept stainless steel reactor (D-01) equipped with a mixer (G-01), temperature control (A-01), a thermocouple to measure the temperature inside the liquid (F-01) and a valve to discharge the material (E-01). The volatile material is condensed in a heat exchange (C-01) and recovered in a 5-liter reservoir (D-02). A vacuum pump (B-01) maintains the system at a low pressure. A liquid nitrogen trap (C-02) protects the pump against oil vapors and a pressure gauge (H-01) monitors reactor pressure. E-02, E-03 and E-04 are valves for distilled light-fraction discharge, closing the pump circuit and opening the system to atmospheric pressure, respectively. The temperature, heating rat"