Article révisé par les pairs
| Résumé : | The devolatilization of hydropyrolysis (HyPy) chars formed at 485-850 °C under 3 MPa and chars formed at 580 °C under 0-5 MPa of H2 and 3 MPa He is investigated in a thermobalance coupled to two gas chromatographs. The H2, CH4 and CO2 released are analysed every 4 min and all are analysed at the end of the experiment. The amount of residual volatile matter in the chars decreases rectilinearly with the HyPy temperature, whereas their decrease is asymptotic with the HyPy pressure. The char formed under He contains 45% more residual volatile matter than that formed in the same conditions under H2. The HyPy temperature must be limited if the char is to be burned in a boiler. The CH4 formation is strongly dependant of the HyPy temperature. © 1982. |
