Influence of Pore Structure on CO Adsorptive Characters in Low Rank Soft Coals
Based on the isothermal adsorption tests of 18 samples at 300K,310K,320K,325K,330K, besides, the proximate analysis, maeeral analysis and mercury penetration experiment are finished at the same time, which is for studying the CO adsorptive characters and factors of low rank soft coals. The results show that the isothermal adsorption of CO can be described by Langmuir equation which is same to the model of CI-h because it belongs to tbe Type I adsorption isotherm at low temperature(T≤320K),and the temperature effect on coal adsorption is greater than pressures; however, the relationship is linear between the coal adsorptive quantity of CO and the pressure at high temperature(T>320K), the CO adsorption quantity is increasing along with the pressure, it can be described by Henry equation(Q= KP)which is same to the model of N2. Both temperature and pressure has great influence on CO adsorptive capability of low rank coals, especially the temperatures effect is so very complex that the mechanism need to study further. Both the volatile matter and inertinite which are high popularly in low rank coal samples have great effects on CO adsorptive capability, whats more, the relationships of CO adsorptive capability to the content of volatile matter and inertinite are multinomial and positive correlation. At the same time, the transitional pores (10-100rim) and micro-pores (<10nm) have the dominative roles in low rank coals, and the relationships of CO adsorptive capability to the content of transitional pores and micro-pores are positive and negative correlation, as a word the content of transitional pores benefit the CO adsorptive capability. The research have an important signification to choose the index gas for estimation spontaneous combustion of low rank coal, can increase the correctness of forecasting the spontaneous combustion for safety working in mining, and provides the theoretical basis for studying CO adsorption mechanism.
pore structure CO isothermal adsorption spontaneous combustion
WANG Yuehong GUO Liwen ZHANG Jiuling YANG Xiaowei LIN Jianguang
School of Resource & Safety Engineering ,China University of Mining & Technology(Beijing),Beij ing 1 School of Resource & Environment,Hebei Polytechnic University,Tangshan 063009,Hebei,China Xingtai Risun Coal and Chemical Co.Ltd,Xingtai 054001,Hebei,China MCC Capital Engineering &Research Incorporation Limited,Beijing 100000,China
国际会议
The 2008 International Symposium on Safety Science and Technology(2008年安全科学技术国际会议)
北京
英文
1303-1307
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）