The solubilities of carbon dioxide, hydrogen sulphide and propane in some normal alkane solvents—I: Experimental determinations in the range 15–70°C and comparison with ideal solution values

✍ Scribed by M.B. King; H. Al-Najjar

• Publisher: Elsevier Science
• Year: 1977
• Tongue: English
• Weight: 612 KB
• Volume: 32
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(77)80059-6

✦ Synopsis

Solubdity data for gases m alkane solvents are frequently requrred m the petroleum and petrochemical mdustnes, data for H,S (for example) being needed for the design of separation eqmpment followmg hydrodesulphurisatlon operations The solubllltles of CO, and H2S have been measured as functions of temperature m the n-alkanes Cs to Cl6 at normal pressure Less complete determmatlons have also been made for C,H, A "falhng film" type of apparatus was used and corrections were applied for vapour phase imperfections and for the volume of ddatlon, where this was slgmficant For all three solutes the solublllty was found to increase with mcreasmg alkane cham length, though the rate of increase was only very slight for CO2 m the lower alkanes studied The results were compared with "ideal solution" values and solute actlvrty coefficients were evaluated Those for CO, were compared with terminal values reported by other workers for CO, m lower members of the alkane and alkene series The terminal activity coeficlents for CO, m the aikane senes fell from 2 3 for CO, m &HI., to 1 9 m C,,H, at 25OC The fall m the case of H,S was pronounced, being from 1 51 m C,H,, to 108 m C,,H, A close representation of the behaviour 1s gven by regular solution theory as shown m an accompanying paper