摘要
以煤油共炼残渣与榆林煤为原料,基于热重分析仪和格金干馏仪,开展共炼残渣与煤共热解过程的协同效应及半焦性质研究。实验结果表明:共炼残渣添加比例为0~40%时,煤与共炼残渣之间具有正的协同效应;添加量为20%时,焦油产率高出理论值6.2%,是煤单独热解焦油产率的139.7%,半焦产物为A型且黏结性增加;半焦性质分析结果显示,共炼残渣能够提高半焦在CO_2气化过程中的最大失重速率,有利于气化反应的进行,但会使半焦的燃烧性能变差且在添加量高于20%的情况下更为明显。
Co-pyrolysis behavior and char properties of Yulin coal blended with residue from China YanChang industrial direct coal liquefaction plant has been investigated through thermogravimetry spectrometry and Gray-king low-temperature carbonization. The results show a positive synergistic effect in the pyrolysis process when the proportion of residue is lower than 40%. When the amount of residue is 20%, the yield of tar is higher more than the theoretical value of 6.201% which is 139.7% of the coal alone, when the amount of residue is 20%, the char is A type and the cohesiveness increases. The residue increases the maximum weight loss rate of char during CO_2 gasification, which helps the gasification, but impedes the combustion of char, which is even worse when amount of residue is higher than 20%.
引文
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