Solubility study of methane and ethane in promising physical solvents for natural gas sweetening operations

New data are reported for the solubility of methane and ethane in six physical solvents [diethylene-, triethylene-, and tetraethylene-glycol dimethyl ethers; triethylene glycol monobutyl ether; a mixture of poly(ethylene glycol) dimethyl ethers (PEGDME 250); and N-formyl morpholine (NFM)]. The solubility data were measured at 25 degrees C, 40 degrees C, and 60 degrees C and expressed in the form of Henry's law constants.