Abstract: In this paper, Coats-Redfern was used to analyze the dynamic characteristics of biomass with coal mono-pyrolysis and co-pyrolysis. It mainly researched the influence of heating rate and reaction order on pyrolysis integral curve. It found that in the temperature zone which weight lost rate of raw materials was 5 %-80 %, the higher reaction order and lower reaction temperature, the more influence of heating rate on the pyrolysis integral curve. With the heating rate increasing, the pyrolysis integral curve gradually moved to the high temperature zone. When the different reaction order in the same temperature range was chosen, biomass pyrolysis integral curves all showed well linear relation, especially the rice husk. But reaction orders had clearly influence on the results of the coal mono-pyrolysis and biomass co-pyrolysis with coal. At high reaction orders, it had the well fitting curve, but at the low ones, fitting curves drifted off the linear forms. With the coal rank increasing, the fitting curve obviously drifted off the linear forms. The fitting degree of biomass co-pyrolysis with coal was between the biomass mono-pyrolysis and coal mono-pyrolysis. In the lower temperature range, there was synergistic effect on co-pyrolysis of biomass and coal.

Key words: biomass, coal, Coats-Redfern, co-pyrolysis, synergistic effect