Oxidationreaction and kinetics of anthracite infiltrated by liquid CO2

doi:10.13225/j.cnki.jccs.2019.0976

CORC > 兰州理工大学 > 兰州理工大学 > 石油化工学院

	Oxidationreaction and kinetics of anthracite infiltrated by liquid CO2
	Li, Zhenbao 1,2; Wang, Fengshuang 1; Wei, Gaoming 3; Ma, Li 3; An, Manlin 2; Yu, Shurong 1
刊名	Meitan Xuebao/Journal of the China Coal Society
	2020-06-01
卷号	45 页码:330-335
关键词	Activation energy Anthracite Carbon dioxide Coal bed methane Coal deposits Coal industry Disaster prevention Gas adsorption Gravimetric analysis Greenhouse effect Heat transfer Liquid methane Liquids Methane Oxidation Oxygen Spontaneous combustion Temperature Thermogravimetric analysis Adsorption capacities Apparent activation energy Characteristic temperature Oxidation characteristics Prevention and controls Recycling and utilization Spontaneous combustion tendencies Weight loss temperatures
ISSN号	02539993
DOI	10.13225/j.cnki.jccs.2019.0976
英文摘要	As one of most important sources on greenhouse effect, the CO2 recycling and utilization have become a hot spot in research. In the field of mine disaster prevention and control technology, the technologies for controlling spontaneous coal combustion and displacing coal bed methane by liquid CO2 have achieved a great success. However, the liquid CO2 with low-temperature (from -56 to -20 ) forms a heat transfer after injecting into coal seam, and causes a damaged effect by thermal stress. Specific surface area and volume in coal pore are changed, and then the adsorption capacity of coal-oxygen is transformed and the tendency of spontaneous coal combustion is varied. To study the oxidation characteristics of coal infiltrated by liquid CO2, a thermo gravimetric analysis was carried out with anthracite in Yongcheng mining area of Henan, China. The characteristic temperatures of original and liquid CO2 infiltrated coal oxidation were analyzed. The oxidation kinetics parameters were calculated by non-isothermal methods (FWO and KAS methods), and the influence of liquid CO2 on coal oxidation was obtained. The study shows that the critical temperature and crack temperature of anthracite infiltrated by liquid CO2 were decreased by 2-8 compared with raw coal. The growth temperature, weight loss temperature, ignition temperature, maximum weight loss rate temperature and burnout temperature were advanced by 100-140 . The weight loss percentage corresponding to each characteristic temperature was reduced by 0.8%-10.0%. The interval ranges of four oxidation stages (water evaporation and physical adsorption of oxygen, mass gain through oxygen chemisorption, pyrogenic decomposition and combustion) were reduced. The rate and quantity of oxygen adsorption on infiltrated coal were increased, and the combustion reaction speed of was improved. The apparent activation energy of infiltrated coal sample was decreased by 10-30 kJ/mol in four oxidation stages compared with that of raw coal samples. A positive correlation was shown between pre-exponential factor and apparent activation energy. The spontaneous combustion tendency of coal treated by liquid CO2 was increased, and the process of coal oxidation was accelerated. More stringent measures for preventing spontaneous coal combustion should be carried out after controlling coal fire in gob and displacing coal bed methane by liquid CO2. © 2020, Editorial Office of Journal of China Coal Society. All right reserved.
语种	中文
出版者	China Coal Society
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/151156]
专题	石油化工学院
作者单位	1.College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou; 730050, China; 2.Yancon Group Co., Ltd., Zoucheng; 272100, China; 3.College of Safety Science and Engineering, Xi'an University of Science and Technology, Xi'an; 710054, China
推荐引用方式 GB/T 7714	Li, Zhenbao,Wang, Fengshuang,Wei, Gaoming,et al. Oxidationreaction and kinetics of anthracite infiltrated by liquid CO2[J]. Meitan Xuebao/Journal of the China Coal Society,2020,45:330-335.
APA	Li, Zhenbao,Wang, Fengshuang,Wei, Gaoming,Ma, Li,An, Manlin,&Yu, Shurong.(2020).Oxidationreaction and kinetics of anthracite infiltrated by liquid CO2.Meitan Xuebao/Journal of the China Coal Society,45,330-335.
MLA	Li, Zhenbao,et al."Oxidationreaction and kinetics of anthracite infiltrated by liquid CO2".Meitan Xuebao/Journal of the China Coal Society 45(2020):330-335.