Pyrolysis and combustion characteristics of coals in oxyfuel combustion(PDF)
发布时间：2025-04-30
点击次数：
- 发布时间：
- 2025-04-30
- 论文名称：
- Pyrolysis and combustion characteristics of coals in oxyfuel combustion(PDF)
- 发表刊物：
- Applied Energy
- 摘要：
- Oxyfuel combustion technology is one of the near-zero emission clean coal technologies, which can realise the large-scale CO2 capture, low NOx emission, and easier removing of SO2. This paper describes the characteristics of pyrolysis, gasification and combustion of coals and chars in oxyfuel combustion applying the non-isothermal thermogravimetric analysis. Experimental results show that the pyrolysis reactivity is highly similar in N2 and CO2 at low temperature. The mass loss rate of experimental coals in CO2 increases significantly at around 810 C. In comparison to the conventional combustion, thermogravimetric curves of coal and char combustion in O2/CO2 tend towards higher temperature zone. Sample mass,particle size and heating rate all have considerable effects on the heat and mass transport process, which influences the whole combustion process of coal particles in oxyfuel conditions. Char reactivity prepared in CO2 is almost equivalent to that prepared in N2. The results of kinetics analysis indicate that compensation effect exists between apparent activation energy and pre-exponential factor in different oxygen concentrations during both coal and char combustion.
- 合写作者：
- Chang’an Wang, Xiaoming Zhang, Yinhe Liu, Defu Che
- 卷号：
- 97
- 页面范围：
- 264–273
- 是否译文：
- 否
- 发表时间：
- 2012-03-22