Effect of microwave irradiation on petrophysical characterization of coals
Effect of microwave irradiation on petrophysical characterization of coals
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DOI：
10.1016/j.applthermaleng.2016.04.019
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发表时间：
2016-06-05
影响因子：
6.4
通讯作者：
Li He
中科院分区：
文献类型：
--
作者：
Hong Yi-du;Lin Bai-quan;Li He
本文介绍的实验工作旨在研究微波辐射对煤的岩石物理性质的影响。对20个煤样进行了2.45 GHz的可变功率(2、4、6kW)辐照。测定并计算了煤样的温度、质量和比热容。用重量法和核磁共振技术评价了微波辐照对煤样孔隙率的影响。微波加热后孔隙率明显增加。有趣的是，随着微波能量的增加，气孔率呈现先减小后增大的趋势。转折点约为100kJ。通过核磁共振测试，评价了微波辐照对煤样孔径、喉道尺寸和孔数的影响。结果表明，随着微波能量的增加，膜的孔径、喉道尺寸和孔数明显增大。总而言之，微波能量似乎有可能对脱气煤层具有潜在的作用。(C)2016爱思唯尔有限公司。保留所有权利。
The experimental work described in this paper aims to study the effect of microwave irradiation on petrophysical characterization of coals. Twenty coal samples were irradiated at 2.45 GHz with variable power (2, 4, 6 kW). The temperature, mass and specific heat capacity of coal samples were measured and calculated. The effect of microwave irradiation on the porosity of coal samples was evaluated by the gravimetric method and nuclear magnetic resonance (NMR) measurements. The porosity obviously increases after microwave heating. Interestingly, growth rate of the porosity decreases at first then increases with microwave energy. The turning point is approximately 100 kJ. The influence of microwave irradiation on pore size, throat size and pore numbers of coal samples were also evaluated by NMR measurements. It suggest that the pore size, throat size and pore numbers are obviously increase with microwave energy. In a word, it appears likely that microwave energy may have the potential for the degassing coal seams. (C) 2016 Elsevier Ltd. All rights reserved.