摘要
为研究Fe_2O_3添加剂对宝日希勒煤(属典型低阶褐煤)热解特性的影响,借助热天平研究其热解失重规律的同时,联用快速裂解仪—气相色谱进行了宝日希勒煤快速热解实验,得到了快速热解气氛中4种主要气体成分(H_2、CO、CO_2和CH_4)的产量随Fe_2O_3添加量的变化规律。结果表明:1000℃终温下未添加Fe_2O_3时转换率仅低至39.5%,适量添加Fe_2O_3对其热解起促进作用,即加入3.5% Fe_2O_3后转换率最大可提高至47.9%(相对提高21.3%);动力学分析结果表明加入Fe_2O_3可以降低热解过程的表观活化能;添加Fe_2O_3后单位质量煤中H_2、CO、CO_2和CH_4的产量均上升,但幅度不一。
To evaluate the effect of the Fe_2O_3 additive on pyrolysis characteristics of the Baorixile lignite（belonging to a typical low rank lignite）, thermal gravimetric analysis was performed to investigate the coal weight loss during its pyrolysis process. Again, in a Py-GC system rapid pyrolysis experiments were carried out to study yields of H_2, CO, CO_2 and CH_4. It is found that compared with the low pyrolysis conversion ratio of 39.5% at 1000 oC without the Fe_2O_3 additive, adding the Fe_2O_3 additive apparently advanced the coal pyrolysis behavior. In detail, the mentioned low pyrolysis conversion ratio increases to the highest level of 47.9%（equaling to an amplification of 21.3%） with an optimized Fe_2O_3 dose. Kinetic analysis demonstrated that appropriately adding Fe_2O_3 into the coal decreases the apparent activation energy of the pyrolysis process. The Fe_2O_3 additive also results in a yield increase appearing in the pyrolysis gas（i.e., H_2, CO, CO_2 and CH_4）. However, different increase rates developes in the pyrolysis gas species.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2016年第1期172-178,共7页
Proceedings of the CSEE
基金
国家重点基础研究发展计划项目(973计划)(2012CB214906)~~
关键词
低阶褐煤
热解特性
Fe_2O_3添加剂
热解转化率
low rank lignite
pyrolysis characteristics
Fe_2O_3 additive
pyrolysis conversion ratio
