Experimental Study on Co-pyrolysis Characteristics of Low-rank Coal and Biomass
To investigate the co-pyrolysis characteristics and synergistic mechanism between low-rank coal and biomass,non-isothermal co-pyrolysis experiments of Naomaohu coal,poplar wood and corn stalk in different proportions were conducted using a thermogravimetric-mass spectrometry combined apparatus.The results indicate that the synergistic effect in the co-pyrolysis of low-rank coal and biomass is influ-enced by blending ratios and biomass types.When Naomaohu coal is mixed with poplar wood at a ratio of 3∶1,co-pyrolysis enhances the release of volatile matter,reduces the yield of semi-coke,and yields hy-drogen and methane below the theoretically weighted calculation values.The synergistic effect is most sig-nificant;in the co-pyrolysis of Naomaohu coal and corn stalk,the synergistic effect primarily manifests as the inhibition of volatile matter release and an increase in semi-coke yield;calcium oxide is identified as one of the key factors affecting the co-pyrolysis characteristics of poplar wood,corn stalk,and Naomaohu coal,which significantly influences the co-pyrolysis synergistic effect,delays the pyrolysis of biomass,re-duces the pyrolysis temperature of Naomaohu coal,and increases the overlap of pyrolysis intervals,there-by promoting reactions between coal and biomass volatile matters.
NETL
NSTL
万方数据
