Solubility Parameter of Methane in Bitumen

Methane solubility parameters are required when using a regular solution approach to predict asphaltene precipitation from crude oils that contain methane. To determine these parameters, asphaltene onsets and yields from mixtures of bitumen, methane, and n-pentane were measured at temperatures of 21 and 130 °C and pressures of 10 and 60 MPa. The onsets (solvent content at which asphaltene precipitation was first observed) were measured by...