Abstract—It is important to evaluate the solubility of solid carbon dioxide in liquefied natural gas for natural gas liquefaction at relatively high temperature. The regular solution method and the equations-of-state (EOS) are used to calculate the solubility of carbon dioxide in saturated liquid methane in this paper. The calculation results are compared with the experiment data, and it certifies that the EOS method can be recommended for this kind of solubility calculation. In addition, nitrogen and ethane are common components in natural gas. In this paper, PR EOS is selected to calculate the solubility of carbon dioxide in CH 4 +N 2 and CH 4 +C2 H6 mixtures. R esults show that the solubility of carbon dioxide in liquid CH4+N2 mixtures increases with the addition of nitrogen content in the relatively low temperature region (lower than 155K). With the temperature increases, the solubility of carbon dioxide decreases with the increase of nitrogen content. While in liquid CH4+C2H6 mixtures, it increases with the increase of ethane content.
Index Terms—carbon dioxide, equation-of-state, liquefiednatural gas (LNG), solubility.
Taotao SHEN is with Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai 200240, China (e-mail: yxshentt@sjtu.edu.cn).
Wensheng LIN is with Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai 200240, China(e-mail: linwsh@sjtu.edu.cn.).
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Cite: Taotao SHEN and Wensheng LIN, "Calculation of Carbon Dioxide Solubility in Liquefied Natural Gas," International Journal of Chemical Engineering and Applications vol. 2, no. 5, pp. 366-371, 2011.
