NDLI: Thermal-Conductivity Measurements of Aqueous Orthophosphoric Acid Solutions in the Temperature Range from (293 to 400) K and at Pressures up to 15 MPa

Content Provider	Springer Nature Link
Author	Guseiv, G. G. Abdulagatov, I. M.
Copyright Year	2014
Abstract	A new improved guarded parallel-plate thermal-conductivity cell for absolute measurements of corrosive (chemically aggressive) fluids under pressure has been developed. Using the new modified guarded parallel-plate apparatus the thermal conductivity of aqueous orthophosphoric acid solutions was measured over the temperature range from (293 to 400) K and pressures up to 15 MPa. Measurements were made for three compositions of $$\text {H}_{3}\text {PO}_{4}$$ (8 mass%, 15 mass%, and 50 mass%) along three isobars of (0.101, 5, and 15) MPa. The combined expanded uncertainty of the thermal-conductivity $$(\lambda )$$ measurements at the 95 % confidence level with a coverage factor of $$k=2$$ is estimated to be 2 %. The uncertainties of the temperature, pressure, and concentration measurements were 15 mK, 0.05 %, and 0.01 %, respectively. The temperature, concentration, and pressure dependences of the thermal conductivity of the solution were studied. The measured values of thermal conductivity were compared with the available reported data and the values calculated from various correlation and prediction models. A new wide-range correlation model (extended Jones–Dole type equation with pressure-dependent coefficients) for the $$\text {H}_{3}\text {PO}_{4}$$ (aq) solution was developed using the present experimental data.
Starting Page	218
Ending Page	245
Page Count	28
File Format	PDF
ISSN	0195928X
Journal	International Journal of Thermophysics
Volume Number	35
Issue Number	2
e-ISSN	15729567
Language	English
Publisher	Springer US
Publisher Date	2014-05-18
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Aqueous solution Orthophosphoric acid Parallel-plate technique Thermal conductivity Water Condensed Matter Physics Mechanics Industrial Chemistry/Chemical Engineering Physical Chemistry
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics

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