Microcell for potentiometric pH measurements of supercritical aqueous solutions

Journal of Supercritical Fluids

Volumn 39, Issue 2, 2006, Pages 271-276

  Sue, Kiwamu ^a,b   Ouchi, Fumiaki ^b   Arai, Kunio ^b  

^a NIHON UNIVERSITY   (Japan)

^b TOHOKU UNIVERSITY   (Japan)

Author keywords

Aqueous solution; Ionization constant; Microcell; pH; Potentiometric; Supercritical; Water

Indexed keywords

ELECTROCHEMISTRY; ELECTRODES; ORGANIC ACIDS; PH EFFECTS; REACTION KINETICS; SUPERCRITICAL FLUIDS;

IONIZATION CONSTANT; MICROCELLS; POTENTIOMETRIC;

ELECTRIC BATTERIES;

EID: 33750299700     PISSN: 08968446     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.supflu.2006.03.017     Document Type: Article

References (24)

1. Chen X., Izatt R.M., and Oscarson J.L. Thermodynamic data for ligand interaction with protons and metal-ions in aqueous-solutions at high-temperatures. Chem. Rev. 94 (1994) 467
2. Palmer D.A., Fernández-Prini R., and Harvey A.H. Aqueous Systems at Elevated Temperatures and Pressures (2004), Elesevier Academic Press p. 493
3. Sue K., Adschiri T., and Arai K. A predictive model for equilibrium constants of aqueous inorganic species at subcritical and supercritical conditions. Ind. Eng. Chem. Res. 41 13 (2002) 3298
4. Helgeson H.C., Kirkham D.H., and Flowers G.C. Theoretical prediction of the thermodynamic behavior of aqueous electrolytes at high pressures and temperatures: IV. Calculation of activity coefficients, osmotic coefficients, and apparent molal and standard and relative partial molal properties to 600 °C and 5 kb. Am. J. Sci. 281 (1981) 1249
5. Ho P.C., Bianchi H., Palmer D.A., and Wood R.H. Conductivity of dilute aqueous electrolyte solutions at high temperatures and pressures using a flow cell. J. Solution Chem. 29 3 (2000) 217
6. Ho P.C., Palmer D.A., and Gruszkiewicz M.S. Conductivity measurements of dilute aqueous HCl solutions to high temperatures and pressures using a flow-through cell. J. Phys. Chem. B 105 (2001) 1260
7. Ho P.C., Palmer D.A., and Wood R.H. Conductivity measurements of dilute aqueous LiOH, NaOH, and KOH solutions to high temperatures and pressures using a flow-through cell. J. Phys. Chem. B 104 (2000) 12084
8. Xiang T., and Johnston K.P. Acid-base behavior of organic compounds in supercritical water. J. Phys. Chem. 98 (1994) 7915
9. Chlistunoff J., Ziegler K.J., Lasdon L., and Johnston K.P. Nitric/nitrous acid equilibria in supercritical water. J. Phys. Chem., A 103 (1999) 1678
10. Xiang T., and Johnston K.P. Acid-base behavior in supercritical water: β-naphthoic acid-ammonia equilibrium. J. Solution Chem. 26 1 (1997) 13
11. Ryan E.T., Xiang T., Johnston K.P., and Fox M.A. Absorption and fluorescence studies of acridine in subcritical and supercritical water. J. Phys. Chem., A 101 (1997) 1827
12. Wofford W.T., Gloyna E.F., and Johnston K.P. Boric acid equilibria in near-critical and supercritical water. Ind. Eng. Chem. Res. 37 (1998) 2045
13. Chlistunoff J.B., and Johnston K.P. UV-vis spectroscopic determination of the dissociation constant of bichromate from 160 to 400 °C. J. Phys. Chem. B 102 (1998) 3993
14. Xiang T., Johnston K.P., Wofford W.T., and Gloyna E.F. Spectroscopic measurement of pH in aqueous sulfuric acid and ammonia from sub-to supercritical conditions. Ind. Eng. Chem. Res. 35 (1996) 4788
15. Lvov S.N., Gao H., Kouznetsov D., Balachov I., and Macdonald D.D. Potentiometric pH measurements in high subcritical and supercritical aqueous solutions. Fluid Phase Equilib. 150-151 (1998) 515
16. Lvov S.N., Zhou X.Y., and Macdonald D.D. Flow-through electrochemical cell for accurate pH measurements at temperatures up to 400 °C. J. Electroanal. Chem. 463 (1999) 146
17. Sue K., Murata K., Matsuura Y., Tsukagoshi M., Adschiri T., and Arai K. Potentiometric cell for measuring pH of supercritical aqueous solutions. Rev. Sci. Instrum. 72 12 (2001) 4442
18. Sue K., Uchida M., Usami T., Adschiri T., and Arai K. Apparatus for direct pH measurement of supercritical aqueous solutions. J. Supercrit. Fluids 28 2-3 (2004) 287
19. Sue K., Uchida M., Adschiri T., and Arai K. Determination of sulfuric acid first dissociation constants to 400 °C and 32 MPa by potentiometric pH measurements. J. Supercrit. Fluids 31 1-3 (2004) 295
20. Sue K., Murata K., Matsuura Y., Tsukagoshi M., Adschiri T., and Arai K. Flow-through electrochemicalcell for pH measurement of organic acid aqueous solutions at subcritical and supercritical conditions. Fluid Phase Equilib. 194-197 (2002) 1097
21. Sue K., Usami T., and Arai K. Determination of acetic acid dissociation constants to 400 °C and 32 MPa by potentiometric pH measurements. J. Chem. Eng. Data 48 4 (2003) 1081
22. Sue K., Ouchi F., Minami K., and Arai K. Determination of carboxylic acid dissociation constants to 350 °C at 23 MPa by potentiometric pH measurements. J. Chem. Eng. Data 49 5 (2004) 1359
23. Yu J.L., and Savage P.E. Decomposition of formic acid under hydrothermal conditions. Ind. Eng. Chem. Res. 37 1 (1998) 2
24. Baes Jr. C.F., and Mesmer R.E. The Hydrolysis of Cations (1976), A Wiley-Interscience Publication, John & Sons, NY p. 14