𝔖 Bobbio Scriptorium
✦   LIBER   ✦

An accurate single-sinker densimeter and measurements of the (p, ρ,T) relation of argon and nitrogen in the temperature range from (235 to 520) K at pressures up to 30 MPa

✍ Scribed by J. Klimeck; R. Kleinrahm; W. Wagner

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
497 KB
Volume
30
Category
Article
ISSN
0021-9614

No coin nor oath required. For personal study only.

✦ Synopsis

A single-sinker densimeter has been developed for accurate density measurements in the Ž . Ž technically and scientifically important regions of the p, , T surface of fluids density range . y3

. y3 2 kg m to 2000 kg m ; temperature range 233 K to 523 K; pressure range 0.2 MPa to . 30 MPa . The method used for measuring the density is based on the Archimedes buoyancy principle, but applied in a new way. The buoyancy force exerted by the sample fluid on an immersed sinker is transferred through the wall of the measuring cell by a magnetic suspension coupling to an analytical balance. The new single-sinker densimeter avoids most of the shortcomings of other methods of densimetry, and enlarges the operational range for density measurements in reference quality up to higher temperatures and pressures. In order to test the new apparatus and to determine density values of reference quality, comprehensive Ž . Ž . Ž . p , , T measurements on pure argon 237 values and pure nitrogen 177 values were carried out in the entire working range of the apparatus. The total relative uncertainty of the . y4 . . y 4 . < < < < measurements in density was estimated to be -1.5 10 to -2 10 . The experimental results are compared with results of previous studies, and with those calculated Ž . from current equations of state. A second paper will report the results of the p, , T measurements on pure carbon dioxide and pure methane, also carried out with this apparatus.

📜 SIMILAR VOLUMES

Measurement and correlation of the (p, ρ
Measurement and correlation of the (p, ρ,T) relation of ethylene I. The homogeneous gaseous and liquid regions in the temperature range from 105 K to 340 K at pressures up to 12 MPa
✍ P. Nowak; R. Kleinrahm; W. Wagner 📂 Article 📅 1996 🏛 Elsevier Science 🌐 English ⚖ 455 KB

Comprehensive (p ,r ,T ) measurements on pure ethylene have been carried out in the single-phase region (678 values) and along the entire (vapour + liquid) coexistence curve (185 values). The results reported in this first paper cover the homogeneous gas and liquid region in the temperature range fr

(p, ρ, T) measurements of (ammonia&#xa0;
(p, ρ, T) measurements of (ammonia&#xa0;+&#xa0; water) in the temperature range 310 K to 400 K at pressures up to 17 MPa. II. Measurements of{ xNH3&#xa0;+&#xa0; (1 &#xa0;−&#xa0;x )H2O } at x&#xa0;=&#xa0;(1.0000, 0.8374, 0.6005, and 0.2973)
✍ J. Kondo; Y. Yasukawa; M. Uematsu 📂 Article 📅 2002 🏛 Elsevier Science 🌐 English ⚖ 430 KB

Measurements of ( p, ρ, T ) for {x NH 3 + (1 -x)H 2 O} at x = (1.0000, 0.8374, 0.6005, and 0.2973) and at specified temperatures and pressures in the compressed liquid phase were carried out with a metal-bellows variable volumometer between T = 310 K and T = 400 K at pressures up to 17 MPa. The resu

( p, ρ, T) measurements of (ammonia&#xa0
( p, ρ, T) measurements of (ammonia&#xa0;+&#xa0; water) in the temperature range 310 K to 400 K at pressures up to 17 MPa. I. Measurements of { xNH 3&#xa0;+&#xa0; (1 &#xa0;−&#xa0;x ) H 2O } at x&#xa0;=&#xa0; (0.8952, 0.8041, 0.6985, 0.5052, and 0.1016)
✍ T Munakata; K Kasahara; M Uematsu 📂 Article 📅 2002 🏛 Elsevier Science 🌐 English ⚖ 483 KB

p, ρ, T ) measurements of (ammonia + water) in the temperature range 310 K to 400 K at pressures up to 17 MPa. I. Measurements of {xNH 3 + (1 -x)H 2 O} at x = (0.8952, 0.8041, 0.6985, 0.5052, and 0.1016)