褐煤与稻壳加水共热解特性研究

STUDY ON THE CO-PYROLYSIS OF LIGNITE AND RICE HUSK WITH ADDING H2O

研究了试样中加水量对褐煤与稻壳共热解过程的影响.在原料中加水再进行热解,考察不同加水量下热解气体产物总量变化规律,并利用气相色谱分析热解气体产物组分的变化情况,同时分析加水量对热解剩余固体产物的影响.结果发现,随着加水量的增多,共热解气体产物总量增多,当加水量为原料质量的60%时气体产物增加最多;此外,加水量增多可以提高共热解气体产物中H2/CO比,但对CO2组分影响不大;不同加水量下固体转化率变化不大,但不同加水量对剩余物表面官能团有一定影响,从加水量为60%开始剩余固体表面含氧官能团有明显减少,这与加水量对气体产物的影响规律相对应.

The influence of adding H2O was investigated during co-pyrolysis of rice husk and lignite. Adding H2O into the co-pyrolysis raw material, then the samples were pyrolysised with different content of H2O. The variation trendy of gas yield and gas content were detected through gas chromatogram. And the effect of H2O content on solid residence products was also analyzed. The result showed that the gas yield increased as the content of adding H2O. The gas yield increased most when the adding ratio of H2O was 60 %. In addition, the ratio of gas product H2/CO increased with the adding H2O increased, while CO2 did not change a lot. The convention of solid residence products almost kept the same under different adding H2O content. However, the surface functional groups of solid products had a marked change since the adding ratio of H2O was 60%, which consistent with the change regularity of gas yield.