Co-Pyrolysis Characteristics of Corn Straw and Seaweed
To solve the shortage of terrestrial biomass resources,the development of aquatic biomass to effectively replace part of terrestrial biomass is imminent.In this paper,the characteristics of co-pyrolysis of corn straw and seaweed were investigated by thermogravimetric method,focusing on the effects of mixing ratio and heating rate,and the thermodynamic and kinetic properties of the mixed samples were analyzed.The results showed that the pyrolysis was divided into three stages:drying,volatile analysis,and coke pyrolysis.After blending,the final weight loss rate and the maximum weight loss rate of the blended samples were smaller than those when pure straw and pure seaweed reacted alone.With the increase in the proportion of seaweed blending,the flammability index Ca increased and then decreased,the ignition characteristic index K decreased,and the pyrolysis characteristic index S increased and then decreased.Under different heating rate conditions,in the pyrolysis interval(200-600℃),the thermogravimetric curve of the samples shifted to the right with the increase of heating rate,and the weight loss rate was getting larger and larger.The maximal weight loss rate first decreased and then increased,and it was the smallest at 30℃/min.Ca decreases,K and S are increased.The kinetic study showed an obvious synergistic effect in the mixed samples under different blending ratios,which reduced the activation energy required for co-pyrolysis.Under different heating rates,the larger the heating rate,the smaller the activation energy required,and the easier the pyrolysis of the samples.
corn strawheating rateblending ratioactivation energy
NETL
NSTL
万方数据
维普
