Vapor-liquid equilibria for low temperature CH4/H2 mixture

As a type of gas mixture mainly composed of methane, synthetic natural gas (SNG) needs accurate description for its vapor-liquid equilibria (VLE) in order to utilize it better. Particularly considering the hydrogen component is involved, current researches still lack of sufficient VLE data for CH4/H2 system at cryogenic temperature and low pressure which are common conditions for SNG indusial application. In this paper, a VLE experimental apparatus based on the static analytic method is used to measure VLE data for CH4/H2 system at seven different temperatures ranging from 100.1 K to 130.7 K and pressure below 3.5 MPa. Some commonly used equations are also used to analyze their reliability for predicting the VLE properties of the CH4/H2 system at cryogenic temperature and low pressure.