TY - JOUR
T1 - Phase behavior for carbon dioxide/tetraalkoxysilane systems
AU - Hamada, Takeshi
AU - Kobayashi, Daisuke
AU - Takahashi, Tomoki
AU - Shono, Atsushi
AU - Otake, Katsuto
AU - Tsuji, Tomoya
AU - Yoda, Satoshi
AU - Furuya, Takeshi
PY - 2012/5/25
Y1 - 2012/5/25
N2 - Phase diagrams of carbon dioxide (CO 2)/tetramethoxysilane (TMOS) and CO 2/tetraethoxysilane (TEOS) binary systems were measured. Liquid phase measurements were performed by observing the bubble point pressure with a synthetic method. Vapor phase measurements were conducted with a flow type apparatus. For the CO 2/TMOS system, liquid phase lines were measured at temperatures from 313.2 to 393.2K, and CO 2 molar fractions from 0.15 to 0.85, and vapor phase lines were obtained at temperatures 313.2, 353.2 and 393.2K and pressures up to 12MPa. For the CO 2/TEOS system, measurements were conducted only for liquid phase lines at temperatures from 313.2 to 373.2K and CO 2 molar fractions from 0.25 to 0.75. Phase behavior of these two systems was almost the same with each other. Experimental data were correlated with the Peng-Robinson equation of state (PR EoS), and the molecular interaction parameter k ij and l ij for both systems were determined. For large difference in the molecular size of CO 2 and tetraalkoxysilanes, it was found that the l ij could be negligible.
AB - Phase diagrams of carbon dioxide (CO 2)/tetramethoxysilane (TMOS) and CO 2/tetraethoxysilane (TEOS) binary systems were measured. Liquid phase measurements were performed by observing the bubble point pressure with a synthetic method. Vapor phase measurements were conducted with a flow type apparatus. For the CO 2/TMOS system, liquid phase lines were measured at temperatures from 313.2 to 393.2K, and CO 2 molar fractions from 0.15 to 0.85, and vapor phase lines were obtained at temperatures 313.2, 353.2 and 393.2K and pressures up to 12MPa. For the CO 2/TEOS system, measurements were conducted only for liquid phase lines at temperatures from 313.2 to 373.2K and CO 2 molar fractions from 0.25 to 0.75. Phase behavior of these two systems was almost the same with each other. Experimental data were correlated with the Peng-Robinson equation of state (PR EoS), and the molecular interaction parameter k ij and l ij for both systems were determined. For large difference in the molecular size of CO 2 and tetraalkoxysilanes, it was found that the l ij could be negligible.
KW - Carbon dioxide
KW - Peng-Robinson equation of State
KW - Tetraethoxysilane
KW - Tetramethoxysilane
KW - Vapor-liquid equilibrium
UR - http://www.scopus.com/inward/record.url?scp=84859977100&partnerID=8YFLogxK
U2 - 10.1016/j.fluid.2012.02.018
DO - 10.1016/j.fluid.2012.02.018
M3 - Article
AN - SCOPUS:84859977100
SN - 0378-3812
VL - 322-323
SP - 135
EP - 141
JO - Fluid Phase Equilibria
JF - Fluid Phase Equilibria
ER -