There are a large number of nanopores in abandoned shale gas reservoirs.To investigate whether the abandoned shale gas reservoirs have the potential to store H2 and whether some H2 will remain in the formation during the pressure reduction and H2 release,the distribution patterns of H2 and CH4 in different shaped kerogen nanopores,as well as the storage-release processes of H2 under dif-ferent pressures,are compared by molecular simulation.The results indicate that CH4 has a limited adsorption advantage in the kerogen pores,which gradually weakens with increasing pressure.The interaction force between H2 and the wall of kerogen pores is weak,and the confinement effect is not significant.Under different pore sizes and pressure conditions,H2 is uniformly distributed in the pores,and there is no retention phenomenon during the decompression process.
关键词
分子模拟/H2地下封存/氢能存储/纳米孔隙/限域效应/干酪根/页岩
Key words
molecular dynamics simulation/underground storage of H2/storage of hydrogen energy/nanopores/confinement effect/kero-gen/shale
维普
万方数据