Thermodynamic Study of binary an ternary systems containing CO2 + impurities in the context of CO2 transportation

International audienceCO2 capture transportation and storage, or CO2 capture transportation and utilization, are two ways which should be considered in the industry in order to reduce the emission of CO2. After capture, CO2 is not pure and contain impurities like SO2, NOx, N2, O2 and Ar for example. Two binary systems involving CO2 were studied in this work (CO2 + SO2 at 263.15 and ACCEPTED MANUSCRIPT 333.21 K and between 0.1 and 8.8 MPa and CO2 + NO in at 232.93, 252.98 and 273.15 K, and between 1 and 11.5 MPa ) and two ternary systems (CO2 + O2 + Ar and CO2 + SO2 + O2 (expected composition (0.94/0.03/0.03 mole fractions)) at 253, 273 and 293 K, between 1.9 and 7.6 MPa) were also studied experimentally. The equipment used is based on "staticanalytic" method, taking advantage of two capillary samplers (Rolsi™, Armines' patent). The classical Peng-Robinson equation of state is used to represent the isothermal P, x, y data.

Law, Language, and Forensic Psychiatry

Dr. Thomas Szaz, a controversial figure in psychiatry today, attacks the use of a medical model to explain abnormal behavior. The authors analyze Szaz\u27 views and their implications on the issues of the insanity plea, competency to stand trial, the right to medical treatment, involuntary civil commitment, and victimless crimes

Vapour-Liquid Equilibria of Ethane and Ethanethiol : Experiments and Modelling

We acknowledge the Scottish Funding Council for providing a travel grant to Dr Waheed Afzal under Northern Research Partnership program. Mr Pascal Theveneau is gratefully acknowledged for his support to adopt experimental setup for this work.Peer reviewedPublisher PD

Experimental Determination of Thermophysical Properties of Working Fluids for ORC Applications

The design and optimization of Organic Rankine Cycle (ORC) require knowledge concerning the thermophysical properties of the working fluids: pure components or mixtures. These properties are generally calculated by thermodynamic and transport property models (thermodynamic or equation of state or correlations). The parameters of these models are adjusted on accurate experimental data. The main experimental data of interest concern phase equilibrium properties (noncritical and critical data), volumetric properties (density and speed of sound), energetic properties (enthalpy, heat capacity), and transport properties (dynamic viscosity and thermal conductivity). In this chapter, some experimental techniques frequently used to obtain the experimental data are presented. Also, we will present some models frequently used to correlate the data and some results (comparison between experimental data and model predictions)

Vapor–Liquid–Liquid Equilibrium Measurements and Modeling of the Methanethiol + Methane + Water Ternary System at 304, 334, and 364 K

International audienceNew vapor-liquid-liquid equilibrium (VLLE) data for methanethiol (CH 3SH) + methane (CH 4) + water (H 2O) have been obtained at three temperatures (304, 334, and 364 K) and pressures up to 9 MPa. A "static-analytical" method was used to perform all of the measurements. The objective was to provide experimental VLLE data for CH 3SH with other natural gas contents at its crude form for which limited or no data are available in the open literature. Such kinds of data are required for the industrial modeling of sulfur emissions. It is observed from the experimental data that the solubility of CH 4 in the aqueous and organic phases increases with an increase of the total system pressure and decreases with an increase of the temperature. However, the solubility of CH 3SH in the aqueous and organic phases decreases slightly with an increase of the total system pressure and increases significantly with an increase of the temperature. The new VLLE data of this ternary system were compared with predictions of the cubic-plus-association equation of state. The model tends to underpredict the concentration of CH 3SH in all phases, particularly the vapor phase

Experimental and modelling study of the densities of the hydrogen sulphide + methane mixtures at 253, 273 and 293 K and pressures up to 30 MPa

International audienceDensities of three binary mixtures of hydrogen sulphide and methane (xH 2 S + (1-x) CH 4), with mole fractions of 0.1315, 0.1803 and 0.2860 of acid gas, were determined experimentally at three temperatures (253, 273 and 293) K and at pressures up to 30 MPa. Densities were measured continuously using a high temperature and high pressure Vibrating Tube densitometer (VTD), Anton Paar DMA 512. The SAFT-VR Mie, PR and GERG2008 equations of state (EoS) are used to describe the experimental data with different levels of success

Volumetric Properties of Furan and 2‑5-Dimethylfuran in Different Industrial Solvents at Temperatures from 278 to 343 K

Peer reviewedPostprin

Equilibrium data and GC-PC SAFT predictions for furanic extraction

International audienceThe present study concerns phase equilibria measurements involving oxygenated components (furan and furfural) and potential solvents of extraction (n-hexane, ethanol and n-octanol) using an ebulli-ometer at atmospheric pressure. New liquid-liquid equilibrium data concerning the ternary system furan þ furfural þ n-hexane are also presented. The experimental technique used for the liquid-liquid equilibrium measurements is based on the static analytic method. The two liquid phases are sampled using a syringe and analyzed using gas chromatograph. Two thermodynamic approaches are considered for the data treatment: the first considers a dissymmetric approach using the NRTL activity coefficient model, and the second considers a group contribution model based on the PC-SAFT EoS (GC-PPC SAFT). The experimentally measured data were successfully correlated with the models proposed