The Experts below are selected from a list of 16221 Experts worldwide ranked by ideXlab platform
Manbae Han - One of the best experts on this subject based on the ideXlab platform.
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the effects of synthetically designed diesel fuel properties cetane number aromatic content Distillation Temperature on low Temperature diesel combustion
Fuel, 2013Co-Authors: Manbae HanAbstract:Abstract This study investigated the effects of synthetically designed diesel fuel properties i.e. cetane number (CN), aromatic content, and 90% Distillation Temperature (T90) on the combustion characteristics and exhaust emissions in low-Temperature diesel combustion (LTC). LTC was achieved by a similar approach to previous work via alteration of injection strategy, a cooled heavy EGR rate at low speed and low load, and at 1500 rpm and 2.6 bar BMEP in a 1.9 L common rail direct injection diesel engine. The test fuels were synthetically designed, whose properties constitute CNs of 30 and 55, aromatic contents of 20% and 45%, and T90 Temperatures of 270 and 340 °C. In LTC operating conditions, the CN is found to be the most dominant factor in the ignition delay time, followed by the T90 Temperature for the lower CN fuels, and the aromatic content for the higher CN fuels. Given a CN, the location of mass fraction burned (MFB) 5% and MFB50% showed a linear relationship, and thus the aromatic content and T90 Temperature effects can be diminished by adjusting the start of injection timing. PM was strongly dependent on the ignition delay time regardless of fuel types: no PM was observed as long as the ignition delay time was longer than 18 °CA. For CN55 fuels, the NO x emission showed strong dependence on the location of MFB50% regardless of fuel types, i.e. NO x decreases as the MFB50% location retards. For CN30 fuels, the aromatic content acts as a crucial factor in the increase of NO x as similar to the studies of conventional diesel combustion.
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The effects of synthetically designed diesel fuel properties – cetane number, aromatic content, Distillation Temperature, on low-Temperature diesel combustion
Fuel, 2013Co-Authors: Manbae HanAbstract:Abstract This study investigated the effects of synthetically designed diesel fuel properties i.e. cetane number (CN), aromatic content, and 90% Distillation Temperature (T90) on the combustion characteristics and exhaust emissions in low-Temperature diesel combustion (LTC). LTC was achieved by a similar approach to previous work via alteration of injection strategy, a cooled heavy EGR rate at low speed and low load, and at 1500 rpm and 2.6 bar BMEP in a 1.9 L common rail direct injection diesel engine. The test fuels were synthetically designed, whose properties constitute CNs of 30 and 55, aromatic contents of 20% and 45%, and T90 Temperatures of 270 and 340 °C. In LTC operating conditions, the CN is found to be the most dominant factor in the ignition delay time, followed by the T90 Temperature for the lower CN fuels, and the aromatic content for the higher CN fuels. Given a CN, the location of mass fraction burned (MFB) 5% and MFB50% showed a linear relationship, and thus the aromatic content and T90 Temperature effects can be diminished by adjusting the start of injection timing. PM was strongly dependent on the ignition delay time regardless of fuel types: no PM was observed as long as the ignition delay time was longer than 18 °CA. For CN55 fuels, the NO x emission showed strong dependence on the location of MFB50% regardless of fuel types, i.e. NO x decreases as the MFB50% location retards. For CN30 fuels, the aromatic content acts as a crucial factor in the increase of NO x as similar to the studies of conventional diesel combustion.
Dachun Liu - One of the best experts on this subject based on the ideXlab platform.
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Energy Technology 2015: Carbon Dioxide Management and Other Technologies - Investigation on Recycling of Ag from Pb-Cu-Ag Alloy by Vacuum Distillation 1
Energy Technology 2015, 2015Co-Authors: Bingyi Song, Bin Yang, Wenlong Jiang, Qitong Yang, Dachun LiuAbstract:The feasibility of recycling of Ag from Pb-Cu-Ag alloy by vacuum Distillation was analyzed at six different Temperatures (973, 1023, 1073, 1123, 1173, and 1223K) under the vacuum of 1–20Pa. The saturated vapor pressure, separation coefficient and gas-liquid phase equilibrium were calculated. The results show that this method is feasible. The influence of Distillation Temperature and time on the result of experiment was also investigated. The results show that Ag content in the residue and Pb and Cu content in the volatile increase with the increasing Distillation Temperature and time. The enriching times of Ag and the removal rate of Pb are larger than 32 and 99.9%, respectively at 1223K corresponding to 30–120min. The optimum Distillation condition is the Temperature of 1223K and time 60 min, and the high purity of Ag (93.3 wt. %) is reached.
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Process optimization for vacuum Distillation of Sn–Sb alloy by response surface methodology
Vacuum, 2014Co-Authors: Anxiang Wang, Bin Yang, Kong Lingxin, Dachun LiuAbstract:Abstract Based on the molecular interaction volume model (MIVM), the vapor–liquid phase equilibrium of Sn–Sb alloy was calculated, which was used to predict the element distribution of Sn–Sb alloy between vapor and liquid phase during vacuum Distillation. A central composite design (CCD) was used to optimize the process parameters influencing the content of Sn in liquid phase and the direct yield of Sn. The studied parameters were Distillation Temperature, feeding materials and soaking time. Two quadratic mathematical model equations were derived for predicting the content of Sn in liquid phase and the direct yield of Sn. The analysis of variance (ANOVA) shown that Distillation Temperature was the most significant factor affecting the separation of Sn–Sb alloy. In the process optimization, while the direct yield of Sn equal to 92%, the maximum content of Sn in liquid phase should be 99.66 wt.% under the conditions of 1531 K, 137 g and 46 min. The confirmation test values of 91.22% and 99.43 wt.% were fair agreement with the predicted data, which demonstrated that these models were very good and can be used for parameter optimization in vacuum Distillation.
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Pretreatment of lead anode slime with low silver by vacuum Distillation for concentrating silver
Journal of Central South University, 2013Co-Authors: Tian Yang, Dachun Liu, Hou-jun Zhou, Yongnian Dai, Bin YangAbstract:The feasibility of separation of lead anode slime with low silver by vacuum Distillation was analyzed theoretically. The volatilization rates and mass fractions of elements, influenced by Distillation Temperature, heat preservation time and material thickness, were investigated under laboratory conditions. The experimental results indicate that almost all of lead and bismuth can be separated from silver-contained multicomponent alloy at 1 223 K for 45 min when the chamber pressure maintains at 10–25 Pa. Silver can be easily enriched in the residue and its mass fraction increases from 3.6% to 27.8% when the Distillation Temperature is between 1 133 K and 1 373 K. Due to the forming of intermetallic compounds Cu2Sb, Cu10Sb3 and Ag3Sb, the antimony could not be evaporated completely during the vacuum Distillation. EDS analysis indicates that the condensate has a columnar crystal structure.
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Application of molecular interaction volume model in separation of Pb–Sn–Sb ternary alloy by vacuum Distillation
Transactions of Nonferrous Metals Society of China, 2013Co-Authors: Kong Lingxin, Bin Yang, Dachun Liu, Yongnian DaiAbstract:Abstract Based on the molecular interaction volume model (MIVM), the activities of components of Pb–Sn–Sb ternary alloy were predicted. The vapor–liquid phase equilibrium of Pb–Sn–Sb alloy system was calculated using the activity coefficients of Pb–Sn–Sb alloy system in the process of vacuum Distillation. The calculated results show that the content of Sn in vapor phase increases with the increasing Distillation Temperature and content of Sn in liquid phase. However, the content of Sn in vapor phase is only 0.45% (mass fraction) while 97% in liquid phase at 1100 °C, which shows that the separating effect is very well. Experimental investigations on the separation of Pb–Sn–Sb ternary alloy were carried out in the Distillation Temperature range of 1100-1300 °C under vacuum condition. It is found that the Sn content in vapor phase is 0.54% while 97% in liquid phase at 1100 °C. Finally, the predicted data were compared with the experimental results showing good agreement with each other.
Bin Yang - One of the best experts on this subject based on the ideXlab platform.
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Optimization of Zn-Al-Fe Alloy Vacuum Distillation Experiments by Response Surface Methodology
10th International Symposium on High-Temperature Metallurgical Processing, 2019Co-Authors: Pu Zhenghao, Bin Yang, Zhang HuanAbstract:Vacuum Distillation of Zn-Al-Fe alloy was discussed based on the experimental investigations of the Distillation Temperature, the holding time and the pressure of pressing block by response surface methodology. The experimental results showed that zinc can be satisfactorily obtained from Zn-Al-Fe alloy with suitable Distillation Temperature, holding time and the pressure of pressing block. The zinc in Zn-Al-Fe alloy was effectively recovered at 1073–1123 K for 60–75 min, and pressure of pressing block was below 50 MPa. When the Temperature was 1073 K, the holding time was 75 min and the pressure of pressing block was 40 MPa, the zinc content in the volatiles was about 98.35% and the aluminium content in the residue was about 92.22%.
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Energy Technology 2015: Carbon Dioxide Management and Other Technologies - Investigation on Recycling of Ag from Pb-Cu-Ag Alloy by Vacuum Distillation 1
Energy Technology 2015, 2015Co-Authors: Bingyi Song, Bin Yang, Wenlong Jiang, Qitong Yang, Dachun LiuAbstract:The feasibility of recycling of Ag from Pb-Cu-Ag alloy by vacuum Distillation was analyzed at six different Temperatures (973, 1023, 1073, 1123, 1173, and 1223K) under the vacuum of 1–20Pa. The saturated vapor pressure, separation coefficient and gas-liquid phase equilibrium were calculated. The results show that this method is feasible. The influence of Distillation Temperature and time on the result of experiment was also investigated. The results show that Ag content in the residue and Pb and Cu content in the volatile increase with the increasing Distillation Temperature and time. The enriching times of Ag and the removal rate of Pb are larger than 32 and 99.9%, respectively at 1223K corresponding to 30–120min. The optimum Distillation condition is the Temperature of 1223K and time 60 min, and the high purity of Ag (93.3 wt. %) is reached.
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Process optimization for vacuum Distillation of Sn–Sb alloy by response surface methodology
Vacuum, 2014Co-Authors: Anxiang Wang, Bin Yang, Kong Lingxin, Dachun LiuAbstract:Abstract Based on the molecular interaction volume model (MIVM), the vapor–liquid phase equilibrium of Sn–Sb alloy was calculated, which was used to predict the element distribution of Sn–Sb alloy between vapor and liquid phase during vacuum Distillation. A central composite design (CCD) was used to optimize the process parameters influencing the content of Sn in liquid phase and the direct yield of Sn. The studied parameters were Distillation Temperature, feeding materials and soaking time. Two quadratic mathematical model equations were derived for predicting the content of Sn in liquid phase and the direct yield of Sn. The analysis of variance (ANOVA) shown that Distillation Temperature was the most significant factor affecting the separation of Sn–Sb alloy. In the process optimization, while the direct yield of Sn equal to 92%, the maximum content of Sn in liquid phase should be 99.66 wt.% under the conditions of 1531 K, 137 g and 46 min. The confirmation test values of 91.22% and 99.43 wt.% were fair agreement with the predicted data, which demonstrated that these models were very good and can be used for parameter optimization in vacuum Distillation.
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Pretreatment of lead anode slime with low silver by vacuum Distillation for concentrating silver
Journal of Central South University, 2013Co-Authors: Tian Yang, Dachun Liu, Hou-jun Zhou, Yongnian Dai, Bin YangAbstract:The feasibility of separation of lead anode slime with low silver by vacuum Distillation was analyzed theoretically. The volatilization rates and mass fractions of elements, influenced by Distillation Temperature, heat preservation time and material thickness, were investigated under laboratory conditions. The experimental results indicate that almost all of lead and bismuth can be separated from silver-contained multicomponent alloy at 1 223 K for 45 min when the chamber pressure maintains at 10–25 Pa. Silver can be easily enriched in the residue and its mass fraction increases from 3.6% to 27.8% when the Distillation Temperature is between 1 133 K and 1 373 K. Due to the forming of intermetallic compounds Cu2Sb, Cu10Sb3 and Ag3Sb, the antimony could not be evaporated completely during the vacuum Distillation. EDS analysis indicates that the condensate has a columnar crystal structure.
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Application of molecular interaction volume model in separation of Pb–Sn–Sb ternary alloy by vacuum Distillation
Transactions of Nonferrous Metals Society of China, 2013Co-Authors: Kong Lingxin, Bin Yang, Dachun Liu, Yongnian DaiAbstract:Abstract Based on the molecular interaction volume model (MIVM), the activities of components of Pb–Sn–Sb ternary alloy were predicted. The vapor–liquid phase equilibrium of Pb–Sn–Sb alloy system was calculated using the activity coefficients of Pb–Sn–Sb alloy system in the process of vacuum Distillation. The calculated results show that the content of Sn in vapor phase increases with the increasing Distillation Temperature and content of Sn in liquid phase. However, the content of Sn in vapor phase is only 0.45% (mass fraction) while 97% in liquid phase at 1100 °C, which shows that the separating effect is very well. Experimental investigations on the separation of Pb–Sn–Sb ternary alloy were carried out in the Distillation Temperature range of 1100-1300 °C under vacuum condition. It is found that the Sn content in vapor phase is 0.54% while 97% in liquid phase at 1100 °C. Finally, the predicted data were compared with the experimental results showing good agreement with each other.
Alejandro G. Marangoni - One of the best experts on this subject based on the ideXlab platform.
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Fractionation of milk fat by short-path Distillation.
Journal of dairy science, 2003Co-Authors: R.j. Campos, J.w. Litwinenko, Alejandro G. MarangoniAbstract:Abstract Fractionation of milk fat by short-path Distillation changes the chemical composition and physical properties of the resulting fractions. Increases in Distillation Temperature from 125 to 250°C increased distillate yield from 0.3 to 42.7% (wt/wt). The distillate was enriched in short- and medium-chain fatty acids and low molecular weight acylglycerols, while the retentate was enriched in long-chain saturated and unsaturated fatty acids as well as high molecular weight acylglyerols. As Distillation Temperature increased, dropping points of the distillate increased. Relative to native milk fat, the solid fat content (SFC) vs. Temperature melting profile of the distillate was depressed and that of the retentate was augmented, which correlated with the saturated long-chain fatty acid content in the fractions. Retentate crystallization parameters obtained by fitting the Avrami model to SFC—time data, did not change as a function of Distillation Temperature, but varied as a function of the degree of undercooling. Changes in microstructure observed by polarized light microscopy also appeared to be solely a function of the degree of undercooling, with no observable differences between retentates obtained at the different Distillation Temperatures. In addition, no changes in the retentate's free energy of nucleation ( Δ G c ) as a function of Distillation Temperature were found. The compressive storage modulus of the crystallized retentate increased as a function of increasing Distillation Temperature.
Kong Lingxin - One of the best experts on this subject based on the ideXlab platform.
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7th International Symposium on High‐Temperature Metallurgical Processing - Thermodynamic Analysis and Experiments on Vacuum Separation of Sn‐Sb Alloy
7th International Symposium on High-Temperature Metallurgical Processing, 2016Co-Authors: Kong Lingxin, Yongnian Dai, Yang Bin, Anxiang WangAbstract:In this study, the saturated vapor pressures of tin (Sn) and antimony (Sb), the separation coefficient s and the vapor-liquid phase equilibrium of Sn-Sb alloy were theoretically analyzed, which demonstrate that it is possible to separate Sn and Sb by vacuum Distillation. The process parameters of vacuum Distillation, including the Distillation Temperature, Distillation time and alloy mass (thickness of raw materials) on the direct yield of Sn and the content of Sn in liquid phase were investigated by using single factor experiments. The preliminary results show that the direct yield and the content of Sn are 98.77 wt.% and 96.01% with the optimized Distillation conditions of a Distillation Temperature of 1473 K, a Distillation time for 45 min and a Sn-Sb alloy mass of 125 g (thickness of 8mm). The Distillation parameters in the study provide effective and convenient conditions on separation of Sn-Sb alloy.
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Process optimization for vacuum Distillation of Sn–Sb alloy by response surface methodology
Vacuum, 2014Co-Authors: Anxiang Wang, Bin Yang, Kong Lingxin, Dachun LiuAbstract:Abstract Based on the molecular interaction volume model (MIVM), the vapor–liquid phase equilibrium of Sn–Sb alloy was calculated, which was used to predict the element distribution of Sn–Sb alloy between vapor and liquid phase during vacuum Distillation. A central composite design (CCD) was used to optimize the process parameters influencing the content of Sn in liquid phase and the direct yield of Sn. The studied parameters were Distillation Temperature, feeding materials and soaking time. Two quadratic mathematical model equations were derived for predicting the content of Sn in liquid phase and the direct yield of Sn. The analysis of variance (ANOVA) shown that Distillation Temperature was the most significant factor affecting the separation of Sn–Sb alloy. In the process optimization, while the direct yield of Sn equal to 92%, the maximum content of Sn in liquid phase should be 99.66 wt.% under the conditions of 1531 K, 137 g and 46 min. The confirmation test values of 91.22% and 99.43 wt.% were fair agreement with the predicted data, which demonstrated that these models were very good and can be used for parameter optimization in vacuum Distillation.
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Application of molecular interaction volume model in separation of Pb–Sn–Sb ternary alloy by vacuum Distillation
Transactions of Nonferrous Metals Society of China, 2013Co-Authors: Kong Lingxin, Bin Yang, Dachun Liu, Yongnian DaiAbstract:Abstract Based on the molecular interaction volume model (MIVM), the activities of components of Pb–Sn–Sb ternary alloy were predicted. The vapor–liquid phase equilibrium of Pb–Sn–Sb alloy system was calculated using the activity coefficients of Pb–Sn–Sb alloy system in the process of vacuum Distillation. The calculated results show that the content of Sn in vapor phase increases with the increasing Distillation Temperature and content of Sn in liquid phase. However, the content of Sn in vapor phase is only 0.45% (mass fraction) while 97% in liquid phase at 1100 °C, which shows that the separating effect is very well. Experimental investigations on the separation of Pb–Sn–Sb ternary alloy were carried out in the Distillation Temperature range of 1100-1300 °C under vacuum condition. It is found that the Sn content in vapor phase is 0.54% while 97% in liquid phase at 1100 °C. Finally, the predicted data were compared with the experimental results showing good agreement with each other.