Solubility of Hydrogen in Mixtures of Toluene, Norbornene, and Cyclic Olefin Copolymer at Various Temperature and Pressures

• Main Authors: Shang-Yung Tsai, 蔡尚鏞
• Other Authors: Liang-Sun Lee
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/91254819133163867947

碩士 === 國立中央大學 === 化學工程與材料工程研究所 === 92 === Abstract In this study, the solubilities of hydrogen in mixtures of toluene, norbornene, and cyclic olefin copolymer (COC) were measured at various temperatures (between 323.15 and 423.15 K), pressures (between 5 and 25 bar), concentrations of norbornene (between 0 and 85 wt %), and concentrations of COC (between 0 and 40 wt %). The experiments were conducted by the pressure decaying method using a newly designed apparatus. The experimental results show that the solubility of hydrogen increases with increasing system pressure but decreases with increasing system temperature in the above mixture. Another interesting observation is that the solubility decreases when the concentration of reaction product, COC, is increased. Thus, in addition to temperature and pressure, the COC concentration affects the reaction extent, and beyond a certain COC concentration, further reaction favoring COC generation is impossible because of the opposite effect on hydrogen solubility. Also, in this study, the experimental solubility data were expressed in vapor-liquid equilibrium relationship and correlated by bubble-pressure calculations with the Peng-Robinson equation of state incorporating the modified van der Waals one-fluid(vdW-1) mixing rules and the Zhong-Masuoka mixing rules, including the consideration of binary interaction parameters. The average absolute deviation percentages (AAD) of the correlation are less than 7 %, except that of pressure with the Z-M mixing rules.