Publications
18 results found
Efika EC, Hoballah R, Li X, et al., 2016, Saturated phase densities of (CO2 + H2O) at temperatures from (293 to 450) K and pressures up to 64 MPa, Journal of Chemical Thermodynamics, Vol: 93, Pages: 347-359, ISSN: 1096-3626
An apparatus consisting of an equilibrium cell connected to two vibrating tube densimeters and two syringe pumps was used to measure the saturated phase densities of (CO2 + H2O) at temperatures from (293 to 450) K and pressures up to 64 MPa, with estimated average standard uncertainties of 1.5 kg · m−3 for the CO2-rich phase and 1.0 kg · m−3 for the aqueous phase. The densimeters were housed in the same thermostat as the equilibrium cell and were calibrated in situ using pure water, CO2 and helium. Following mixing, samples of each saturated phase were displaced sequentially at constant pressure from the equilibrium cell into the vibrating tube densimeters connected to the top (CO2-rich phase) and bottom (aqueous phase) of the cell. The aqueous phase densities are predicted to within 3 kg · m−3 using empirical models for the phase compositions and partial molar volumes of each component. However, a recently developed multi-parameter equation of state (EOS) for this binary mixture, Gernert and Span [32], was found to under predict the measured aqueous phase density by up to 13 kg · m−3. The density of the CO2-rich phase was always within about 8 kg · m−3 of the density for pure CO2 at the same pressure and temperature; the differences were most positive near the critical density, and became negative at temperatures above about 373 K and pressures below about 10 MPa. For this phase, the multi-parameter EOS of Gernert and Span describes the measured densities to within 5 kg · m−3, whereas the computationally-efficient cubic EOS model of Spycher and Pruess (2010), commonly used in simulations of subsurface CO2 sequestration, deviates from the experimental data by a maximum of about 8 kg · m−3.
Tenorio M-J, Parrott AJ, Calladine JA, et al., 2015, Measurement of the vapour–liquid equilibrium of binary and ternary mixtures of CO2, N2 and H2, systems which are of relevance to CCS technology, International Journal of Greenhouse Gas Control, Vol: 41, Pages: 68-81, ISSN: 1750-5836
Sánchez-Vicente Y, Stevens LA, Pando C, et al., 2015, A new sustainable route in supercritical CO2 to functionalize silica SBA-15 with 3-aminopropyltrimethoxysilane as material for carbon capture, Chemical Engineering Journal, Vol: 264, Pages: 886-898, ISSN: 1385-8947
Ke J, Parrott AJ, Sanchez-Vicente Y, et al., 2014, New phase equilibrium analyzer for determination of the vapor-liquid equilibrium of carbon dioxide and permanent gas mixtures for carbon capture and storage, Review of Scientific Instruments, Vol: 85, Pages: 085110-085110, ISSN: 0034-6748
Sánchez-Vicente Y, Pando C, Cortijo M, et al., 2014, Chemical surface modification of mesoporous silica SBA-15 with a tertiary aminosilane using supercritical carbon dioxide, Microporous and Mesoporous Materials, Vol: 193, Pages: 145-153, ISSN: 1387-1811
Sanchez-Vicente Y, Drage TC, Poliakoff M, et al., 2013, Densities of the carbon dioxide+hydrogen, a system of relevance to carbon capture and storage, International Journal of Greenhouse Gas Control, Vol: 13, Pages: 78-86, ISSN: 1750-5836
Sánchez-Vicente Y, Cabañas A, Renuncio JAR, et al., 2013, Supercritical CO2 as a green solvent for eucalyptus and citrus essential oils processing: role of thermal effects upon mixing, RSC Advances, Vol: 3, Pages: 6065-6065
Ke J, Sánchez-Vicente Y, Akien GR, et al., 2010, Detecting phase transitions in supercritical mixtures: an enabling tool for greener chemical reactions, Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol: 466, Pages: 2799-2818, ISSN: 1364-5021
<jats:p> Detecting phase transitions in high-pressure CO <jats:sub>2</jats:sub> and supercritical fluids was first attempted in the nineteenth century. By contrast, Green Chemistry, the design and implementation of cleaner methods of manufacturing and processing chemicals, is barely 20 years old. Now, the use of CO <jats:sub>2</jats:sub> as an environmentally more acceptable replacement for traditional solvents for greener chemical reactions is creating the need for new, more rapid methods for elucidating high-pressure phase behaviour. This paper describes the advantages and limitations of a number of approaches, developed in Nottingham, to meet this need, including acoustic measurements, shear-mode quartz sensors, the fibre-optic reflectometer, the use of holey fibres, attenuated total reflectance infrared spectroscopy and pressure drop measurements. </jats:p>
Couto RM, Simões PC, Reis A, et al., 2010, Supercritical fluid extraction of lipids from the heterotrophic microalga<i>Crypthecodinium cohnii</i>, Engineering in Life Sciences, Pages: NA-NA, ISSN: 1618-0240
Salazar V, Sánchez-Vicente Y, Pando C, et al., 2010, Enthalpies of Absorption of Carbon Dioxide in Aqueous Sodium Glycinate Solutions at Temperatures of (313.15 and 323.15) K, Journal of Chemical & Engineering Data, Vol: 55, Pages: 1215-1218, ISSN: 0021-9568
Sánchez-Vicente Y, Cabañas A, Renuncio JAR, et al., 2009, Supercritical fluid extraction of peach (Prunus persica) seed oil using carbon dioxide and ethanol, The Journal of Supercritical Fluids, Vol: 49, Pages: 167-173, ISSN: 0896-8446
Pérez E, Cabañas A, Renuncio JAR, et al., 2008, Cosolvent Effect of Methanol and Acetic Acid on Dibenzofuran Solubility in Supercritical Carbon Dioxide, Journal of Chemical & Engineering Data, Vol: 53, Pages: 2649-2653, ISSN: 0021-9568
Sánchez-Vicente Y, Pando C, Pérez E, et al., 2008, Excess molar enthalpies for mixtures of supercritical CO2 and linalool, The Journal of Supercritical Fluids, Vol: 46, Pages: 265-271, ISSN: 0896-8446
Pérez E, Cabañas A, Sánchez-Vicente Y, et al., 2008, High-pressure phase equilibria for the binary system carbon dioxide + dibenzofuran, The Journal of Supercritical Fluids, Vol: 46, Pages: 238-244, ISSN: 0896-8446
Sánchez-Vicente Y, Pérez E, Cabañas A, et al., 2007, Excess molar enthalpies for mixtures of supercritical carbon dioxide and 1,8-cineole, The Journal of Supercritical Fluids, Vol: 40, Pages: 331-335, ISSN: 0896-8446
Sánchez-Vicente Y, Pérez E, Cabañas A, et al., 2006, Excess molar enthalpies for mixtures of supercritical carbon dioxide and limonene, Fluid Phase Equilibria, Vol: 246, Pages: 153-157, ISSN: 0378-3812
Pérez E, Sánchez-Vicente Y, Cabañas A, et al., 2006, Excess molar enthalpies for mixtures of carbon dioxide+a modifier (5mol% methanol or 1-octanol) and hexane at 308.15K and 12.40MPa, Fluid Phase Equilibria, Vol: 241, Pages: 283-289, ISSN: 0378-3812
Pérez E, Sánchez-Vicente Y, Cabañas A, et al., 2005, Excess molar enthalpies for mixtures of supercritical carbon dioxide and water+ethanol solutions, The Journal of Supercritical Fluids, Vol: 36, Pages: 23-30, ISSN: 0896-8446
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