Compressed Liquid Densities of Carbon Dioxide + Ethanol Mixtures at Four Compositions via a Vibrating Tube Densimeter up to 363 K and 25 MPa

2002 ◽  
Vol 47 (2) ◽  
pp. 149-154 ◽  
Author(s):  
Abel Zúñiga-Moreno ◽  
Luis A. Galicia-Luna
Keyword(s):  
Carbon Dioxide ◽  
Compressed Liquid ◽  
Vibrating Tube Densimeter

scholarly journals Investigation of the thermodynamic properties of the binary system vitamin K3/carbon dioxide

2017 ◽  
Vol 23 (4) ◽  
pp. 563-571
Author(s):  
Nina Trupej ◽  
Masa Knez-Hrncic ◽  
Mojca Skerget ◽  
Zeljko Knez
Keyword(s):  
Carbon Dioxide ◽  
Binary System ◽  
Thermodynamic Properties ◽  
Partial Molar Volumes ◽  
Analytic Method ◽  
Vitamin K3 ◽  
Molar Volumes ◽  
Vibrating Tube Densimeter ◽  
A Minor

The binary system of vitamin K3 and CO2 was investigated at temperatures of 40, 60 and 80 ?C up to a pressure of 40 MPa. Solubility was measured by a static-analytic method. Partial molar volumes were determined by a method involving a vibrating tube densimeter. The solubility of vitamin K3 in CO2 is found as a function of pressure and temperature. The highest solubility (31.16?10-4 mol?mol-1) was attained at a pressure of 25.40 MPa at temperature of 40?C. However, at temperature of 60?C and a pressure of 24.02 MPa, the solubility was 18.79?10-4 mol?mol-1. Solubility was lower at a temperature of 80?C and a pressure of 22.06 MPa (6.48?10-4 mol?mol-1). The partial molar volumes are negative and the dissolved vitamin K3 has a minor impact on the density of the solution of K3 in CO2 compared to the density of the pure CO2.

Thermodynamics of aqueous carbon dioxide and sulfur dioxide: heat capacities, volumes, and the temperature dependence of ionization

1983 ◽  
Vol 61 (11) ◽  
pp. 2509-2519 ◽  
Author(s):  
José A. Barbero ◽  
Loren G. Hepler ◽  
Keith G. McCurdy ◽  
Peter R. Tremaine
Keyword(s):  
Experimental Data ◽  
Carbon Dioxide ◽  
Infinite Dilution ◽  
Heat Capacities ◽  
Standard State ◽  
Apparent Molar Heat Capacities ◽  
Experimental Heat ◽  
Chemical Relaxation ◽  
Vibrating Tube Densimeter ◽  
New Equation

A flow microcalorimeter and vibrating tube densimeter were used at 25 °C to obtain apparent molar heat capacities and volumes of aqueous NaHCO3, KHCO3, NaHSO3, and KHSO3, from 0.1 to 1.0 mol kg−1, aqueous CO2 from 0.01 to 0.10 mol kg−1 and aqueous SO2 from 0.045 to 2.0 mol kg−1. The contribution of "chemical relaxation" (changes in equilibrium state and enthalpy due to change in temperature) to the experimental heat capacities of aqueous SO2 required special attention, leading to the derivation of a new equation for calculating this effect. Standard state values for the heat capacities and volumes of aqueous CO2, SO2, HCO3−, and HSO3− were obtained from the apparent molar properties by extrapolation to infinite dilution. Combining these results with other thermodynamic data from the literature gave estimates of log K1b the equilibrium constant for the first neutralization of CO2 and SO2, at high temperatures. The results for CO2 reproduce very accurate literature values to within 0.2 at 200 °C. The expression for the reaction [Formula: see text] log K1b = 22.771 + 2776.0/T–8.058 log T, is consistent with the sparse and limited experimental data.

Compressed liquid density measurements of dimethyl ether with a vibrating tube densimeter

2011 ◽  
Vol 43 (9) ◽  
pp. 1371-1374 ◽  
Author(s):  
Jianguo Yin ◽  
Jiangtao Wu ◽  
Xianyang Meng ◽  
Ilmutdin Abdulagatov
Keyword(s):  
Dimethyl Ether ◽  
Liquid Density ◽  
Density Measurements ◽  
Compressed Liquid ◽  
Vibrating Tube Densimeter

Density Measurements for Ethane, Carbon Dioxide, and Methane + Nitrogen Mixtures from 300 to 470 K up to 137 MPa Using a Vibrating Tube Densimeter

2016 ◽  
Vol 61 (8) ◽  
pp. 2791-2798 ◽  
Author(s):  
Martin A. Gomez-Osorio ◽  
Robert A. Browne ◽  
Mauricio Carvajal Diaz ◽  
Kenneth R. Hall ◽  
James C. Holste
Keyword(s):  
Carbon Dioxide ◽  
Density Measurements ◽  
Vibrating Tube Densimeter

One pot synthesis of environmentally friendly lignin nanoparticles with compressed liquid carbon dioxide as an antisolvent

2016 ◽  
Vol 18 (7) ◽  
pp. 2129-2146 ◽  
Author(s):  
Aye Aye Myint ◽  
Hun Wook Lee ◽  
Bumjoon Seo ◽  
Won-Su Son ◽  
Junho Yoon ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Surface Area ◽  
Environmentally Friendly ◽  
Spherical Shape ◽  
Bet Surface Area ◽  
Liquid Carbon ◽  
One Pot ◽  
Liquid Carbon Dioxide ◽  
One Pot Synthesis ◽  
Compressed Liquid

Lignin nanoparticles of uniform, small quasi-spherical shape with a relatively high BET surface area (nearly 92 m2 g−1) were synthesized using a facile, one pot technology of a compressed CO2 antisolvent.

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