摘要
实验研究了不同温度条件下煤中甲烷的解吸特性,结果表明:在相同温度和气压条件下,煤中甲烷的初始解吸速度较快,随着时间的增加,解吸速度慢慢减小,最后达到解吸平衡;煤中甲烷的最终解吸量随温度的增加而增大,煤对甲烷的吸附能力降低。甲烷的解吸动力学规律能用经验公式、扩散模型、渗流模型来描述,且扩散模型能较好地描述甲烷气体的解吸特性;经验公式中参数α、扩散模型与渗流模型中参数Qd∞随温度的增加而增大,扩散模型中参数B与渗流模型中参数b随温度的增加而减小,经验公式中参数β与温度变化无规律性。
Experimental study was made on the desorption characteristics of methane in the coal under different temperature conditions,the results indicated that the initial desorption velocity of methane in the coal was faster under the same temperature and gas pressure,with the time delay,the desorption velocity slowly reduced,and finally,it came to desorption balance;the final desorbed methane amount in the coal increased with the temperature rise,and the absorption ability of coal to the methane reduced.The dynamic rules of methane desorption can be described with the empirical formula,diffusion model and seepage model,and the diffusion model can give better description of the description characteristics of methane;the parameter α in the empirical formula and the parameter Qd∞ in the diffusion model and the seepage model increased with the temperature rise,the parameter B in the diffusion model and the parameter b in the seepage decreased with temperature rise,and the parameter β in the empirical formula was in a random change with temperature.
出处
《矿业安全与环保》
北大核心
2012年第2期6-8,90,共3页
Mining Safety & Environmental Protection
基金
国家自然科学基金青年科学基金项目(50904082)
教育部科学技术研究重点项目(109130)
重庆市自然科学基金项目(CSTC2009BB6354)
重庆大学“211工程”三期创新人才培养计划建设项目(S-10220)
