Staged Coalbed Methane Desorption and the Contribution of Each Stage to Productivity
| Autor: | Lin Wang, Yongqing Wang, Hui Wang, Rui Jiang, Feiying Ma, Haitao Li |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Coalbed methane
Chemistry General Chemical Engineering Analytical chemistry Energy Engineering and Power Technology Langmuir adsorption model General Chemistry Isothermal process Rate of increase symbols.namesake Fuel Technology Volume (thermodynamics) Desorption Scientific method symbols Stage (hydrology) |
| Zdroj: | Chemistry and Technology of Fuels and Oils. 50:344-353 |
| ISSN: | 1573-8310 0009-3092 |
| DOI: | 10.1007/s10553-014-0531-3 |
| Popis: | Based on the Langmuir adsorption isotherm, we have determined coalbed methane desorption efficiency. Three key pressure points are observed on the desorption efficiency curves: turning pressure, transition pressure, and sensitive pressure. Based on data for the key pressure points and the critical desorption pressure for the isothermal desorption process at reduced pressure (depressurization/desorption), we can divide the process into 5 stages: the zero desorption stage, the slow desorption stage, the transitional desorption stage, the quick desorption stage, and the sensitive desorption stage. We use an example to show that during coalbed methane production the zero desorption stage does not contribute to the productivity, the slow and transitional desorption stages make a small contribution, and the major contribution comes from the quick and sensitive desorption stages. A higher sensitive pressure means peak methane production is achieved faster. Higher desorption efficiency obviously means a faster rate of increase in production volume. |
| Databáze: | OpenAIRE |
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