Refining and Manufacturing Research Institute

Chiayi, Taiwan

Refining and Manufacturing Research Institute

Chiayi, Taiwan
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Chen W.-K.,National Chung Hsing University | Lee K.-J.,National Chung Hsing University | Ko J.-W.,Refining and Manufacturing Research Institute | Chang C.-M.J.,National Chung Hsing University | And 2 more authors.
Fluid Phase Equilibria | Year: 2010

Isothermal vapor-liquid equilibria at 333.15 K and 353.15 K for four binary mixtures of benzene + nonane, toluene + o-xylene, m-xylene + sulfolane and o-xylene + sulfolane have been obtained at pressures ranged from 0 to 101.3 kPa over the whole composition range. The Wilson, NRTL and UNIQUAC activity coefficient models have been employed to correlate experimental pressures and liquid mole fractions. The non-ideal behavior of the vapor phase has been considered by using the Peng-Robinson equation of state in calculating the vapor mole fraction. Liquid and vapor densities of these solutions were measured by using two vibrating tube densitometers. The excess molar volumes of the liquid phase were also determined. The P-x-y phase behavior indicates that mixtures of m-xylene + sulfolane, o-xylene + sulfolane and benzene + nonane present large positive deviations from the ideal solution and belong to endothermic mixings because their excess Gibbs energies are positive. © 2009 Elsevier B.V. All rights reserved.


Chen W.-K.,National Chung Hsing University | Lee K.-J.,National Chung Hsing University | Chang C.-M.J.,National Chung Hsing University | Ko J.-W.,Refining and Manufacturing Research Institute | Lee L.-S.,National Central University
Fluid Phase Equilibria | Year: 2010

Isothermal vapor-liquid equilibria at 333.15 K, 343.15 K and 353.15 K for three binary mixtures of o-xylene, m-xylene and p-xylene individually mixed with N-methylformamide (NMF), have been obtained at pressures ranged from 0 kPa to 101.3 kPa over the whole composition range. The Wilson, NRTL and UNIQUAC activity coefficient models have been employed to correlate experimental pressures and liquid mole fractions. The non-ideal behavior of the vapor phase has been considered by using the Peng-Robinson equation of state in calculating the vapor mole fraction. Liquid and vapor densities were measured by using two vibrating tube densitometers. The excess molar volumes of the liquid phase were also determined. Three systems of o-xylene + NMF, m-xylene + NMF and p-xylene + NMF mixtures present large positive deviations from the ideal solution and belong to endothermic mixings because their excess Gibbs energies are positive. Temperature dependent intermolecular parameters in the NRTL model correlation were finally obtained in this study. © 2009 Elsevier B.V. All rights reserved.


Wu T.-S.,Kun Shan University | Hsieh L.-T.,National Pingtung University of Science and Technology | Lin S.-L.,National Cheng Kung University | Chang Y.-C.,National Taiwan University | And 2 more authors.
Aerosol and Air Quality Research | Year: 2010

In order to clamp down on the illegal use of fishing boat fuel A (FBFA) and to reduce exhaust emissions in Taiwan, the residue from a desulfurization unit (RDS) and pyrolysis fuel oil (PFO) were added into FBFA with the ratio of 0.5% to form two new blended fuels (RDS0.5 and PFO0.5). The appearances of fuels from dark to light are RDS0.5, PFO0.5, and FBFA. The two new fuels have higher viscosity than FBFA, which may damage engines and reduce the misuse. The exhaust emissions of CO, HC, NOx, polycyclic aromatic hydrocarbons (PAHs), and carcinogenic potencies (BaPeq) were analyzed by the heavy duty diesel engine (HDDE) transient cycle test. The results show that RDS0.5 has significantly lower particulate matter (PM) emissions, while the PM emissions of PFO0.5 are higher than those of FBFA. In addition, the total PAHs emissions concentration of all three of fishing boat fuels increase from premium (regular) diesel fuel. However, RDS0.5 has relatively lower BaPeq emissions, which are usually considered as carcinogens, than the other fishing boat fuel. Copyright © Taiwan Association for Aerosol Research.


Vapor - liquid equilibria at (333.15, 343.15, and 353.15) K for seven binary mixtures of benzene + nonane, methylbenzene + 1,2-dimethylbenzene, 1,3-dimethylbenzene + 2,3,4,5-tetrahydrothiophene-1,1-dioxide, 1,2-dimethylbenzene + 2,3,4,5-tetrahydrothiophene-1,1-dioxide, 1,2-dimethylbenzene + N-methylformamide (NMF), 1,3-dimethylbenzene + NMF, and 1,4-dimethylbenzene + NMF have been obtained at pressures ranging from (0.01 to 101.3) kPa. The Wilson, nonrandom two-liquid (NRTL), and universal quasichemical (UNIQUAC) activity coefficient models have been employed to correlate experimental data to find intermolecular parameters. The nonideal behavior of the vapor phase has been considered by using the Peng-Robinson equation of state in calculating the vapor mole fraction. Liquid and vapor densities were measured by using two vibrating tube densitometers to determine liquid excess molar volumes. Six systems of benzene + nonane, 1,3-dimethylbenzene + 2,3,4,5-tetrahydrothiophene-1,1-dioxide, 1,2-dimethylbenzene + 2,3,4,5-tetrahydrothiophene-1,1-dioxide, 1,2-dimethylbenzene + NMF, 1,3-dimethylbenzene + NMF, and 1,4-dimethylbenzene + NMF mixtures present large positive deviations from the ideal solution and belong to endothermic mixtures because their excess Gibbs energies are positive. Only one system of the methylbenzene + 1,2-dimethylbenzene mixture may present a slight exothermic mixing deviation from the ideal solution. Temperature-dependent intermolecular parameters in the three models were obtained in this study. © 2010 American Chemical Society.


Chen W.-K.,National Chung Hsing University | Shen Y.-C.,National Chung Hsing University | Ko J.-W.,Refining and Manufacturing Research Institute | Chang C.M.J.,National Chung Hsing University
Journal of the Taiwan Institute of Chemical Engineers | Year: 2011

Isothermal P-T-x phase equilibria at 333.15. K and 353.15. K for five binary mixtures of benzene + toluene, benzene + N-methylformamide (NMF), heptane + octane, toluene + m-xylene and toluene + NMF were obtained at pressures from 0. kPa to 101.3. kPa over the whole composition range and liquid densities of these solutions were measured by using vibrating tube densitometers. The excess molar volumes of the liquid phase were determined and the excess molar volumes behavior indicates that three mixtures of benzene + toluene, heptane + octane and toluene + m-xylene present positive deviation from ideal solution and two mixtures containing the NMF component display largely negative deviation from ideal solution. © 2010 Taiwan Institute of Chemical Engineers.

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