两种加热方式下玉米芯-褐煤共热解产物的特性

采用微波和低温固定床2种加热方式，对不同配比下的玉米芯-褐煤混合物的共热解产物特性进行了研究。结果表明，当玉米芯配入量为30%时，2种加热方式下的焦油产率均达到最大值，其中微波加热下的焦油产率最大为16.31%，比低温加热(11.70%)提高了39.40%。对热解焦油进行GC-MS检测，发现添加30%玉米芯后，微波加热下的脂肪族和酚类含量分别比低温加热提高了8.41%和16.12%，杂原子含量降低了34.51%，实现了微波加热下焦油更大程度的高品质化。对热解半焦进行SEM分析，发现微波加热下的共热解半焦表面较低温加热下变得更粗糙，裂纹更丰富。

Characteristics of co pyrolysis products of corncob lignite under two heating modes

The characteristics of co pyrolysis products of corncob lignite with different ratios were studied under two heating modes,which called microwave and low temperature fixed bed.The results showed that when the corncob content was 30%,the tar yield under both heating modes reached the maximum,and the tar yield under the microwave heating was 16.31%,which was 39.40% higher than the low temperature heating(11.70%).The results of GC MS showed that the content of aliphatic and phenol in microwave heating increased by 8.41% and 16.12%,while the content of heteroatom decreased by 34.51%,compared to low temperature heating,respectively,with the addition of 30% corncob,which achieved a high quality tar generation.The SEM analysis of pyrolysis char showed that the surface of co pyrolysis char under microwave heating became more rough,and there was an more abundant crack than the low temperature heating.