摘要
分别在具有不同H2、CH4、CO等气体组成的热解反应气气氛下,采用10g固定床反应器考察了先锋褐煤热解产品收率的变化规律,并利用日本SHIMADZUGC17A/QP5000MS对焦油进行色质联检。结果表明:焦炉气中甲烷和一氧化碳对加氢热解有十分重要的作用,二者相互促进相互制约共同影响热解结果。其中甲烷对加氢热解的影响具有双重性,一方面它能提高焦油收率(特别是在较高压力下),同时能明显增加焦油中苯、甲苯、二甲苯(BTX)和萘的相对含量,实现焦油轻质化;另一方面它又降低热解总转化率(半焦收率增加)并生成更多的热解水分。焦炉煤气中的一氧化碳也有利于提高热解总转化率、焦油收率并主要通过增加酚、甲酚、二甲酚(PCX)的含量以改善焦油质量,但它却促进了水的生成。相比较而言,焦炉煤气中甲烷对增加热解焦油产率和改善焦油质量比一氧化碳具有更为明显的影响。
Pyrolysis of Xianfeng lignite under reactive gases of different contents of H 2、CH 4、CO etc were investigated, in a 10g fixedbed reactor, under the same H 2 partial pressure (3MPa) and the final temperature of 650℃ with a heating rate of 5℃/min The tar yields were analyzed by a SHIMADZU GC17A/QP5000MS The results show that CH 4 and CO in cokeoven gas play important roles in pyrolysis of coal CH 4 in cokeoven gas is beneficial for increasing tar yield and for a high content of BTX and naphthalene, but it decreases the total conversion CO in cokeoven gas is helpful for increasing the total conversion and tar yield, and for a high content of PCX, however it brings the unwanted production of water from the reaction between CO and H 2 By comparison, CH 4 plays a more important role than CO for increasing the tar yield and enhancing the quality of tar
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
1998年第1期13-17,共5页
Journal of Fuel Chemistry and Technology
基金
日本NEDO资助项目
山西省自然科学基金
山东省自然科学基
北京中关村地区测试中心资助