通过bossliu
双孔扩散模型中大孔、微孔扩散系数的确定方法
Most of these inversioin methods only work for unipore diffusion system. For diffusion occurring in multi-scale porous coal, bidisperse diffusion models can be used. Correspondingly the gas diffusivities can be determined by two methods described as follows.
1.Minimizing method
By which the apparent macropore and micropore diffusivities are usually retrieved as two fitting parameters by minimizing a least-square function.
2.Analytical method
Which is proposed by Do and Rice under a given assumption, the contribution of pore diffusion and surface diffusion on overall sorption rate can be determined from a simple linear plot of the inverse of half time of adsorption verse a concentration factor. However, the analytical solution derived from Langmuir isotherm may be not accurat for any cases, especially for the cases of the poor fit of Langmuir isotherm to pure gas adsorption isotherms. Using this method, Karacan and Mitchell studied the surface and pore diffusivity of CO2 sequestration in coal seams, and reported that both of pore diffusion and surface diffusion are important for total sorption rate
bossliu administrator
清醒 专注 努力
发表评论
发表评论
- 不是你的菜就赶紧分开，不要互相耽误 2020年11月23日不是你的菜就赶紧分开，不要互相耽误
- 这四个字值多少钱你根本意识不到。 2020年11月23日这四个字值多少钱你根本意识不到。转发 @ETF拯救世界: 新高不卖。卖点不是猜出来的。
关于作者