远红外作用下不同含水率煤体吸附/解吸能量变化规律  

Change law of adsorption/desorption energy of coal with different water content under the action of far infrared

作　　者：马凯 马钱钱 史永涛[1,2] MA Kai;MA Qianqian;SHI Yongtao(Chongqing Research Institute Co.Ltd.,China Coal Technology and Engineering Group Corp.,Chongqing 400037,China;National Key Laboratory of Gas Disaster Detecting,Preventing and Emergency Controlling,Chongqing 400037,China)

机构地区：[1]中煤科工集团重庆研究院有限公司,重庆400037 [2]瓦斯灾害监控与应急技术国家重点实验室,重庆400037

出　　处：《煤田地质与勘探》2020年第3期86-92,共7页Coal Geology & Exploration

基　　金：国家科技重大专项任务(2016ZX05043-005-003)。

摘　　要：煤体对气体进行吸附/解吸过程的本质是气体分子和煤基质表面分子或原子相互作用的过程,而发生相互作用的本质是能量变化,为了深入研究远红外作用下煤层气吸附/解吸过程及能量变化规律,利用自主研制装置进行远红外作用下不同含水率煤样对CO2的吸附/解吸实验,然后利用远红外热辐射原理所得的吸附/解吸能量公式对实验结果进行计算,得到不同含水率煤体吸附/解吸过程能量变化规律。结果表明:在远红外作用下,解吸率虽然随含水率增大呈下降趋势,但是下降幅度明显减小,远红外作用可以降低水分对煤层气吸附/解吸能力的影响;远红外作用下不同含水率煤体对气体吸附/解吸过程是一个物理变化,从能量角度可以解释该过程,其变化规律与等温吸附/解吸过程相吻合。研究结果丰富了煤层气增产技术理论。The essence of coal gas adsorption/desorption process is the process of interaction between gas molecules and molecules or atoms on the surface of the coal matrix,and the nature of the interaction is energy change.In order to deeply study the coalbed gas adsorption/desorption rules and energy change rules under the action of far infrared,the self-developed device was used to perform CO2 adsorption/desorption experiments on coal samples with different water contents under the action of far infrared.Then,the experimental results are calculated using the adsorption/desorption energy change model obtained from the principle of far-infrared thermal radiation,and the energy change rules of the coal adsorption/desorption processes with different water contents are obtained.The results show that after the far-infrared action,the desorption rate decreases with the increase of the water content,but the decline is significantly reduced.The far-infrared action can reduce the effect of moisture on the coalbed gas adsorption/desorption capacity.The gas adsorption/desorption process of coal with different water contents under the action of far-infrared is a physical change,which can be explained from the point of view of energy,and its change law is consistent with the isothermal adsorption/desorption process.The research results enrich the theory of stimulation technology for coalbed methane development.

关 键 词：吸附/解吸 含水率 远红外 功率 能量变化 吸附势 解吸率 

分 类 号：TD712[矿业工程—矿井通风与安全]