Vapor Pressure Measurements of Dimethyl Ether from (233 to 399) K (original) (raw)
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VLE and VLLE Measurements of Dimethyl Ether Containing Systems. 2
Journal of Chemical & Engineering Data, 2003
In total, 14 isotherms for systems composed of the components nitrogen, carbon dioxide, dimethyl ether (DME), water, ethanol, and 1-propanol were measured. Experimental data for all the phases present, vapor-liquid equilibria (VLE), or vapor-liquid-liquid equilibria (VLLE), in the temperature range (25 to 45)°C and in the pressure range (5 to 102) bar, are presented. The data were not correlated.
Dimethyl ether ( DME ) : a clean fuel / energy for the 21 st century and the low carbon society
2016
Dimethyl ether (DME) is the smallest ether, and its chemical formula is CH3OCH3. DME usually exists as gas, but it is easy to liquefy by cooling at -25 C at atmospheric pressure and by pressurizing under 0.5 MPa at room temperature. Therefore, DME is easy to handle like liquefied petroleum gas (LPG). DME will be used as a fuel of substitute of LPG. Cetane number of DME is 55-60, so DME will be used as a diesel fuel. DME does not contain poisonous substances, and it burns with no particulate matters (PM), no sulphur oxides (SOx), and less nitrogen oxides (NOx). Therefore, DME is expected as a clean fuel/energy for the 21st century. DME is able to replace light oil and LPG, and its physical properties are similar to those of LPG. It is possible that DME infrastructures will be settled more rapidly than hydrogen, because existing LPG infrastructures can be used for DME. DME is expected as excellent hydrogen/energy carrier and hydrogen storage. It is expected that fuel cell is one of th...
Dimethyl ether (DME) as potential environmental friendly fuel
E3S Web of Conferences
In recent years, there has been a growing interest in replacing petroleum fuels with so-called second generation environmental friendly fuels. Compared to traditional petroleum fuels dimethyl ether (DME) could be used as a clean high-efficiency compression ignition fuel with reduced particulate matter (PM), sulfur oxides (SOx), hydrocarbons (HC), carbon monoxide (CO) as well as combustion noise. Compared to some of the other leading alternative fuel candidates i.e., methane, methanol, ethanol, compressed natural gas, DME appears to have the largest potential impact on society including well-to-wheel greenhouse gas emissions, non-petroleum feedstocks, well-to-wheel efficiencies, fuel versatility, infrastructure, availability, economics, and safety and should be considered as the fuel of choice for eliminating the dependency on petroleum. This paper reviews the properties and the DME combustion effects on environmental and they were compared to diesel characteristic as well as the eff...
International Journal of Engineering, Science and Technology, 2011
Vapor-liquid equilibrium (VLE) data were predicted for the binary mixture of carbon dioxide (CO 2) and dimethyl ether (DME) at ten temperatures ranging from 273.15 to 386.56 K and pressure upto 7.9 MPa to observe this mixture's potential of COP enhancement and capacity modulation as a working fluid in a refrigeration system. Since the mixtures are zeotropic in nature and the components of the mixtures have good thermophysical properties, zero ozone depleting potential (ODP) and low global warming potential (GWP), they are considered as promising alternative refrigerants. The Benedict-Web-Rubin (BWR) and the modified Benedict-Web-Rubin (MBWR) equations of state (EoS) have been used for the prediction of VLE data. For the BWR and MBWR equations of state, respective constant binary interaction parameters have been determined by using the available experimental VLE data of CO 2 /DME mixtures. The predicted VLE data have been compared with the experimental data and the data obtained from REFPROP version 8.0. Among the comparison results, BWR EoS shows good agreement with the experimental data.
2011
Vapor-liquid equilibrium (VLE) data were predicted for the binary mixture of carbon dioxide (CO 2) and dimethyl ether (DME) at ten temperatures ranging from 273.15 to 386.56 K and pressure upto 7.9 MPa to observe this mixture's potential of COP enhancement and capacity modulation as a working fluid in a refrigeration system. Since the mixtures are zeotropic in nature and the components of the mixtures have good thermophysical properties, zero ozone depleting potential (ODP) and low global warming potential (GWP), they are considered as promising alternative refrigerants. The Benedict-Web-Rubin (BWR) and the modified Benedict-Web-Rubin (MBWR) equations of state (EoS) have been used for the prediction of VLE data. For the BWR and MBWR equations of state, respective constant binary interaction parameters have been determined by using the available experimental VLE data of CO 2 /DME mixtures. The predicted VLE data have been compared with the experimental data and the data obtained from REFPROP version 8.0. Among the comparison results, BWR EoS shows good agreement with the experimental data.
PVT properties of an alternative biofuel: dimethyl ether
Journal of Thermal Analysis and Calorimetry, 2009
Dimethyl ether is an important chemical material and it has many engineering applications. It is a clean and economical alternative fuel and an ozone-friendly refrigerant. In this work, its PVT properties have been object of study. In particular, the experimental work was performed both in the two-phase region and in the superheated vapor region phase by means of the isochoric method. The isochoric measurements were carried out at temperatures from 219 K to 363 K and at pressures from 22 kPa up to 1740 kPa. A total of 159 points, both in the two phase (71 points) and in the superheated vapor region (88 points) were obtained. The present experimental PVT data contribute to the deeper knowledge of the behaviour of the fluid both in the superheated vapour and in the saturation pressure region and to the development of a new equation of state.
Dimethyl ether (DME) as an alternative fuel
Journal of Power Sources, 2006
With ever growing concerns on environmental pollution, energy security, and future oil supplies, the global community is seeking nonpetroleum based alternative fuels, along with more advanced energy technologies (e.g., fuel cells) to increase the efficiency of energy use. The most promising alternative fuel will be the fuel that has the greatest impact on society. The major impact areas include well-to-wheel greenhouse gas emissions, non-petroleum feed stocks, well-to-wheel efficiencies, fuel versatility, infrastructure, availability, economics, and safety. Compared to some of the other leading alternative fuel candidates (i.e., methane, methanol, ethanol, and Fischer-Tropsch fuels), dimethyl ether appears to have the largest potential impact on society, and should be considered as the fuel of choice for eliminating the dependency on petroleum. DME can be used as a clean high-efficiency compression ignition fuel with reduced NO x , SO x , and particulate matter, it can be efficiently reformed to hydrogen at low temperatures, and does not have large issues with toxicity, production, infrastructure, and transportation as do various other fuels. The literature relevant to DME use is reviewed and summarized to demonstrate the viability of DME as an alternative fuel.
The Journal of Chemical Thermodynamics, 2012
The pressures (P) and its temperature derivatives or thermal-pressure coefficient, c V = (oP/oT) V , of DEE have been measured in the near-and supercritical regions as a function of temperature along the various liquid and vapour isochores. Measurements were made in the immediate vicinity of the liquid-gas phase transition and the critical points (single-and two-phase regions) using a high-temperature, high-pressure, nearly constant-volume adiabatic piezo-calorimeter. The constant-volume adiabatic calorimeter previously used for C V measurements was additionally supplied with high accurate strain gauge (calibrated piezoelectric transducer) to measure simultaneously the PvT, C V vT, and thermal-pressure coefficient c V. Measurements were made along 17 liquid and vapour isochores in the range from (212.6 to 534.6) kg Á m À3 and at temperatures from (347 to 575) K and at pressures up to 18 MPa. The quasi-static thermo-(reading of PRT, T-s plot) and barograms (readings of the high accurate strain gauge, P-s plot) techniques were used to accurate measure of the phase transition parameters (P S , q S , T S) and c V at saturation curve. Temperatures at the liquid-gas phase transition curve, T S (q), for each measured density (isochore) and the critical parameters (T C and q C) for DEE were obtained using the quasi-static thermograms technique. The expanded uncertainty of the pressure and its temperature derivative, (oP/oT) V , measurements at the 95% confidence level with a coverage factor of k = 2 is estimated to be 0.05% and (0.12 to 1.5)% (depending on temperature and pressure), respectively. The measured pressures and temperature derivatives, (oP/oT) V , have been used to calculate the internal pressure (or energy-volume coefficient)
The Journal of Chemical Thermodynamics, 2012
The vapor pressure of pure 1-methoxy-2-propanol and 2-methoxyethanol, commonly used as co-solvents in inks, paints, coatings, organic/water solutions among many other applications, were measured with a dynamic recirculation apparatus at a pressure range of (15 to 177) kPa. The measurements were performed at temperature ranges of (342 to 412) K for 1-methoxy-2-propanol and (346 to 417) K for 2methoxyethanol. The maximum likelihood method was used to estimate the parameters of the Antoine equation, the parameters of an extended Antoine equation and the Wagner equation were determined by non linear least squares method. The three models showed root mean square deviations (rmsd) of 0.39%, 0.38%, and 0.29%, and 0.37%, 0.33%, and 0.32%, for 1-methoxy-2-propanol and 2-methoxyethanol, respectively. Additionally, the experimental data and correlation were compared with those available in the literature.