1. 大佛寺煤储层甲烷解吸的传质过程研究.
- Author
-
马东民, 王传涛, 杨 甫, 何 倩, 李 倩, 戴 楠, 张晨阳, and 索根喜
- Subjects
- *
MASS transfer , *LEAD in water , *LIQUID nitrogen , *TRANSFER functions , *WATER - Abstract
Targeted at the particle migration process, energy source and transmission of CH4 during its desorption process, the vitrain and durain in No. 4 Mine of Dafosi are stripped to conduct a series of contrast experiments concerning industrial analysis, coal petrographical analysis, liquid nitrogen adsorption, mercury injection experiments, wetting testing, adsorption and desorption, and then the adsorption heats are calculated. It is discovered that (1) In terms of mass transfer function, coal pores are classified into semi-open pores and interconnected pores. With large adsorbing capacity, vitrain mainly has semi-open pores, and durain mainly has interconnected ones. (2) Depressurization turbulence leads to water vaporization. Heat release from the adsorption of H2O leads to the desorption of CH4. The nature of depressurization desorption is competitive adsorption, manifesting as replacement desorption. (3) The mass transfer process of CBM is a cavitation process of CH4 gas nucleus with low solubility. The water adsorption of coal, equilibrium water experiments and the results of CT scanning all basically verify the understanding of the mass transfer process of CBM production. The research results supplement the issue of energy source of adsorption. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF