A Langmuir-like desorption model for reflecting the inhomogeneous pore structure of coal and its experimental verification. Issue 4 (11th December 2014)

• Record Type: Journal Article
• Authors: Jiang, Haina; Cheng, Yuanping; Yuan, Liang
• Is Part Of: RSC advances. Volume 5:Issue 4(2015)
• Page Start: 2434
• Page End: 2440
• Publication Date: 2014-12-11
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c4ra08620a
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : A Langmuir-like model was established to describe the desorption kinetics of methane in coal with inhomogeneous pore structure. Abstract : A Langmuir-like model was established to describe the desorption kinetics of methane in coal with inhomogeneous pore structure. Two Chinese coal samples were selected to study the initial CH4 desorption rate in coals with the volumetric method under five equilibrium pressures. The results show that the pressure has a significant influence on desorption kinetics of methane in coal. At a constant temperature, the desorption volume increases with pressure. And at a given desorption time, the desorption volume appears to have a Langmuir-like relationship with pressure. Also, the relationship between the parameters in the Langmuir-like model and desorption time is a power function. Thus, we can obtain the changing law of desorption volume with the equilibrium pressure and the desorption time from a Langmuir-like model. This model is a valuable option to the prediction of lost gas content and identification of coal and gas outburst.