层柱状微孔材料吸附存储天然气的Monte Carlo模拟

采用巨正则系综MonteCarlo方法模拟了天然气中主要成分甲烷在层柱状微孔材料中T=300K下的吸附存储,在模拟中层柱状微孔采用Yi等人建立的柱子均匀分布在两炭孔墙之间的模型来表征。甲烷分子采用Lennard-Jones球型分子模型,炭孔墙采用Steele的10-4-3模型,对孔宽为1.36nm的层柱微孔,模拟了四个不同孔率的层柱材料吸附甲烷的情形。得到了孔中流体的局部密度分布以及吸附等温线,对比不同孔率下甲烷的吸附量,得到了此情形吸附甲烷的较佳孔率为0.94。

Monte carblo simulation of natural gas adsorption storage in pillared layered material

Grand canonical ensemble Monte Carlo (GCEMC) method has been used for adsorption storage of methane, the main component in natural gas, in pillared layered material at T=300K. Pillared layered material is modeled by the approach of Yi et al. with the uniform distribution of pillars. Methane is described as a spherical Lennard-Jones molecule, and 10-4-3 potential from Steele is used for representing the interaction between methane and a carbon wall in the GCEMC simulation. The local density profiles and the adsorption isotherms of methane adsorbed in pillared layered material with 4 various porosities in the pores of width 1.36 nm were obtained. Consequently, an optimum porosity of the pillared layered material is recommended for the adsorption storage of methane.