松木屑与煤加压热解特性

The pressurized individual pyrolysis and co-pyrolysis characteristics of pine sawdust and Xinjiang Bernstein bituminous were analyzed. Pyrolysis experiments were conducted in pressurized thermogravimetric analyzer (PTGA) under 0.1-2.0 MPa. Pyrolysis weight loss curves were drawn according to samples pyrolysis weight loss, and weight loss rate and pyrolysis kinetics of curves were examined. Results show that increased pressure depresses the release of volatiles and increases apparent activation energy of the main pyrolysis stage by 56%-85%. The process of co-pyrolysis is not the accumulation of individual pyrolysis, but is affected by inhibition or acceleration effect of synergistic reaction. The experimental weight loss of co-pyrolysis increases 8%-23% in pressurized condition while decreases 6.7% in atmospheric condition compared to the calculated results. The apparent activation energy of co-pyrolysis in both atmospheric and pressurized condition is lower than that of individual pyrolysis during the main pyrolysis stages.