TY - JOUR
T1 - Experimental measurements of carbon dioxide solubility in aqueous tetra-n-butylammonium bromide solutions
AU - Muromachi, Sanehiro
AU - Shijima, Atsushi
AU - Miyamoto, Hiroyuki
AU - Ohmura, Ryo
N1 - Funding Information:
This study was supported in part by a Grant-in-Aid for the Global COE Program for the “Center for Education and Research of Symbiotic, Safe and Secure System Design”, and a Grant-in-Aid for the Japan Society for the Promotion of Science Fellows (23-56572) of the Ministry of Education, Culture, Sports, Science and Technology, Japan.
Publisher Copyright:
© 2015 Elsevier Ltd. All rights reserved.
PY - 2015/6
Y1 - 2015/6
N2 - In this paper, we report the absolute measurements of CO2 solubility in aqueous tetra-n-butylammonium bromide (TBAB) solution. The measurement range was 0.2 MPa < P < 4 MPa, 286.15 K < T < 298.15 K, with 0 (pure water) < wTBAB < 0.4, where P, T, and wTBAB denote the pressure, temperature, and mass fraction of TBAB in the aqueous feed solutions, respectively. These thermodynamic conditions are outside the hydrate formation region. We evaluated salting-in and -out effects based on the experimental data, and confirmed that the CO2 salting-out effect of TBAB clearly appeared at T = 292 K with wTBAB < 0.32 and the salting-in effect may exist for P > 3 MPa and T > 292 K with wTBAB ≤ 0.4 mass fraction of TBAB.
AB - In this paper, we report the absolute measurements of CO2 solubility in aqueous tetra-n-butylammonium bromide (TBAB) solution. The measurement range was 0.2 MPa < P < 4 MPa, 286.15 K < T < 298.15 K, with 0 (pure water) < wTBAB < 0.4, where P, T, and wTBAB denote the pressure, temperature, and mass fraction of TBAB in the aqueous feed solutions, respectively. These thermodynamic conditions are outside the hydrate formation region. We evaluated salting-in and -out effects based on the experimental data, and confirmed that the CO2 salting-out effect of TBAB clearly appeared at T = 292 K with wTBAB < 0.32 and the salting-in effect may exist for P > 3 MPa and T > 292 K with wTBAB ≤ 0.4 mass fraction of TBAB.
KW - Carbon dioxide
KW - Gas hydrate
KW - Semiclathrate hydrate
KW - Solubility
KW - Tetra-n-butylammonium bromide
KW - Water
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U2 - 10.1016/j.jct.2015.01.008
DO - 10.1016/j.jct.2015.01.008
M3 - Article
AN - SCOPUS:84922701107
SN - 0021-9614
VL - 85
SP - 94
EP - 100
JO - Journal of Chemical Thermodynamics
JF - Journal of Chemical Thermodynamics
ER -