Real gas transport in tapered noncircular nanopores of shale rocks
Real gas transport in tapered noncircular nanopores of shale rocks
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DOI：
10.1002/aic.15678
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发表时间：
2017-07
期刊：
影响因子：
3.7
通讯作者：
Jinze Xu;Keliu Wu;Sheng Yang;Jili Cao;Zhangxin Chen;Yi Pan;B. Yan
中科院分区：
文献类型：
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作者：
Jinze Xu;Keliu Wu;Sheng Yang;Jili Cao;Zhangxin Chen;Yi Pan;B. Yan
建立了一个综合考虑真实的气体效应、分子动力学和气体输运行为的页岩锥形非圆形纳米孔隙气体输运模型。所提出的模型是很好地验证了实验和模拟数据，包括六种气体，在不同的压力和温度。结果表明，忽略真实的气体效应会导致输运电导的误导。吸附气体的传输率和吸附气体所占面积的比例沿着纳米孔的长度增加。孔隙邻近诱导更快的气体传输和省略孔隙邻近导致扩大的吸附气体占主导地位的区域。增大锥度比（入口尺寸与出口尺寸之比）和高宽比会减弱真实的气体效应，降低自由气体输运。此外，它降低了纳米孔的总传输容量，并且锥形圆形纳米孔具有最大的传输容量，其次是锥形方形，椭圆形和矩形纳米孔。© 2017美国化学工程师学会AIChE J，63：3224-3242，2017
A model for gas transport in tapered noncircular nanopores of shale rocks with integrating real gas effect, molecular kinetic, and transport behavior was presented. The proposed model is well validated with experimental and simulation data, including six kinds of gases, under different pressures, and temperatures. Results show that neglect of real gas effect results in the misleading transport conductance. The adsorbed gas transport ratio and the ratio of area occupied by adsorbed gas increase along the length of nanopore. Pore proximity induces the faster gas transport and omitting pore proximity leads to the enlargement of the adsorbed gas-dominated region. Increasing taper ratio (ratio of inlet size to outlet size) and aspect ratio weakens real gas effect and lowers free gas transport. Moreover, it lowers the total transport capacity of the nanopore, and the tapered circular nanopore owns the greatest transport capacity, followed by tapered square, elliptical, and rectangular nanopores. © 2017 American Institute of Chemical Engineers AIChE J, 63: 3224–3242, 2017