Phase behavior of Carbon dioxide/Trimethoxy(methyl)silane and Methylsilicate 51 system

Matsukawa, Hiroaki; Shimada, Yuichiro; Yoda, Satoshi; Okawa, Yasuo; Naya, Masakazu; Shono, Atsushi; Otake, Katsuto

doi:10.1016/j.fluid.2017.09.006

Cited by 12 publications

(6 citation statements)

References 32 publications

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“…Figure 4 shows the effect of the temperature on the CO 2 /MTMS/PS ternary system. As seen in Figure 4 a, upon increasing of the temperature, the VL and VLL lines shifted to higher pressures, analogous to the behavior of the CO 2 /MTMS binary system [ 19 ]. On the other hand, the LL line shifted to lower pressures.…”

Section: Resultsmentioning

confidence: 72%

“…The comparison between ternary and binary systems revealed that the polymer was not involved in the gas phase separation. Furthermore, it was found in previous studies that the VL lines of CO 2 /TMOS and CO 2 /MTMS binary systems almost coincided [ 19 ]. In other words, the removal of an oxygen atom from one of the methoxy groups of TMOS had no effect on the phase diagram, and no difference in affinity was observed between CO 2 and TMOS or MTMS.…”

Section: Resultsmentioning

confidence: 95%

“…With increases of the polymer molecular weight, the vapor-liquid (VL) and the vapor-liquid-liquid (VLL) lines did not change, while the liquid-liquid (LL) line shifted towards the lower CO 2 mass fraction. The VL lines of a CO 2 /MTMS binary system [ 19 ] as well as the VL and VLL lines of the CO 2 /MTMS/PS ternary system were compared using polymer-free bases. As shown in Figure 3 , the solid lines indicate the vapor-liquid equilibrium of the binary system calculated using the Peng-Robinson equation of state (PR EoS).…”

Section: Resultsmentioning

confidence: 99%

“…As shown in Figure 3 , the solid lines indicate the vapor-liquid equilibrium of the binary system calculated using the Peng-Robinson equation of state (PR EoS). The details of this calculation are described in a previous report [ 19 ]. Moreover, wt%-polymer denotes the mass fraction of the polymer in MTMS.…”

Section: Resultsmentioning

confidence: 99%

“…It is also necessary to pay attention to the influence of the silicon alkoxide species on the phase behavior and the corresponding data are needed. The phase behavior of CO 2 /TMOS [ 18 ], CO 2 /MTMS, and CO 2 /methyl silicate 51 (MS-51) systems [ 19 ] have already been reported. In this work, the phase behavior of a CO 2 /MTMS/PS ternary system was measured over a wide range of temperatures, pressures, and polymer mass fractions using a synthetic method.…”

Section: Introductionmentioning

confidence: 99%

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Phase Behavior of a Carbon Dioxide/Methyl Trimethoxy Silane/Polystyrene Ternary System

Matsukawa

Yoda

Okawa³

et al. 2019

Polymers

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Recently, polymeric foams filled with a silica aerogel have been developed. The phase behavior of CO2/silicon alkoxide binary systems and CO2/silicon alkoxide/polymer ternary systems is an important factor that affects the design of novel processes. The phase behavior of a carbon dioxide (CO2)/methyl trimethoxy silane (MTMS)/polystyrene (PS) ternary system was measured using a synthetic method involving the observation of the bubble and cloud point. The phase boundaries were measured at temperatures ranging from 313.2 to 393.2 K and CO2 weight fractions between 0.01 and 0.08. The CO2/MTMS/PS system showed a similar CO2 mass fraction dependence of the phase behavior to that observed for the CO2/tetramethyl orthosilicate (TMOS)/PS system. When the phase boundaries of these systems were compared, the vapor-liquid (VL) and vapor-liquid-liquid (VLL) lines were found to be nearly identical, while the liquid-liquid (LL) lines were different. These results indicate that the affinity between the silicon alkoxide and polymer greatly influences the liquid-liquid phase separation.

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Section: Resultsmentioning

confidence: 72%

Section: Resultsmentioning

confidence: 95%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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