Measuring the gas content of coal Coal bed gas content measurements are commonly used in mine safety as well as coal bed methane resource assessment and recovery applications. Gas content determination techniques generally fall into two categories: (1) direct methods which measure the volume of methane released from a coal sample sealed into a desorption canister and (2) indirect methods based on empirical correlations, or laboratory-derived sorption isotherm methane storage capacity data. Laboratory sorption isotherms provide information about the storage capacity of a coal sample if these are measured under geological realistic pressure and temperature conditions. Thus, the maximum gas content that can be expected for methane recovery can be assessed from such laboratory isotherm measurements.
Measuring the gas content of coal Coal bed gas content measurements are commonly used in mine safety as well as coal bed methane resource assessment and recovery applications. Gas content determination techniques generally fall into two categories: (1) direct methods which measure the volume of methane released from a coal sample sealed into a desorption canister and (2) indirect methods based o,n empirical correlations, or .laboratory-derived sorption isotherm methane storage capacity data. Laboratory sorption isotherms provide information about the storage capacity of a coal sample if these are measured under geolo!gical realistic pressure and temperature conditions. Thus, the maximum gas content that can be expected for methane recovery can be assessed from such laboratory isotherm measurements.