Phase behavior for carbon dioxide/tetraalkoxysilane systems

Takeshi Hamada, Daisuke Kobayashi, Tomoki Takahashi, Atsushi Shono, Katsuto Otake, Tomoya Tsuji, Satoshi Yoda, Takeshi Furuya

研究成果: ジャーナルへの寄稿記事査読

15 被引用数 (Scopus)

抄録

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.

本文言語英語
ページ(範囲)135-141
ページ数7
ジャーナルFluid Phase Equilibria
322-323
DOI
出版ステータス出版済み - 25 5月 2012
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