The Experts below are selected from a list of 5910 Experts worldwide ranked by ideXlab platform
Yuhan Sun - One of the best experts on this subject based on the ideXlab platform.
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design and control of Dimethyl Carbonate methanol separation via pressure swing distillation
Industrial & Engineering Chemistry Research, 2013Co-Authors: Hongmei Wei, Fukui Xiao, Feng Wang, Junliang Zhang, Bo Liao, Ning Zhao, Wei Wei, Yuhan SunAbstract:Separation of Dimethyl Carbonate/methanol azeotropic mixture by using distillation process has been a hot-point in the study of the synthesis process of Dimethyl Carbonate by urea methanolysis method. Most studies focus on the steady-state design, and only few papers have dealt with the dynamic performance and control of this binary azeotropic system. This paper explores the design and control of pressure-swing distillation systems for separation of Dimethyl Carbonate/methanol. The steady-state and dynamic simulations are carried out with Aspen Plus and Aspen Dynamics. Then, on the basis of the global economical analysis, an optimized separation configuration is proposed. The vital operating parameters and geometric parameters are determined according to the simulation and optimization results. Furthermore, two control strategies, CS1 and CS2, are proposed. With disturbance, the proposed basic control structure (CS1) can only maintains the quality specification of products from the bottom of the first col...
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Design and Control of Dimethyl Carbonate–Methanol Separation via Pressure-Swing Distillation
Industrial & Engineering Chemistry Research, 2013Co-Authors: Hongmei Wei, Fukui Xiao, Feng Wang, Junliang Zhang, Bo Liao, Ning Zhao, Wei Wei, Yuhan SunAbstract:Separation of Dimethyl Carbonate/methanol azeotropic mixture by using distillation process has been a hot-point in the study of the synthesis process of Dimethyl Carbonate by urea methanolysis method. Most studies focus on the steady-state design, and only few papers have dealt with the dynamic performance and control of this binary azeotropic system. This paper explores the design and control of pressure-swing distillation systems for separation of Dimethyl Carbonate/methanol. The steady-state and dynamic simulations are carried out with Aspen Plus and Aspen Dynamics. Then, on the basis of the global economical analysis, an optimized separation configuration is proposed. The vital operating parameters and geometric parameters are determined according to the simulation and optimization results. Furthermore, two control strategies, CS1 and CS2, are proposed. With disturbance, the proposed basic control structure (CS1) can only maintains the quality specification of products from the bottom of the first col...
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design and control of Dimethyl Carbonate methanol separation via pressure swing distillation
Industrial & Engineering Chemistry Research, 2013Co-Authors: Hongmei Wei, Fukui Xiao, Feng Wang, Junliang Zhang, Bo Liao, Ning Zhao, Wei Wei, Yuhan SunAbstract:Separation of Dimethyl Carbonate/methanol azeotropic mixture by using distillation process has been a hot-point in the study of the synthesis process of Dimethyl Carbonate by urea methanolysis meth...
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synthesis of Dimethyl Carbonate from methyl carbamate and methanol over lanthanum compounds
Fuel Processing Technology, 2010Co-Authors: Dengfeng Wang, Fukui Xiao, Wei Wei, Xuelan Zhang, Yangyan Gao, Yuhan SunAbstract:Abstract Various lanthanum compounds were used as the catalyst for the synthesis of Dimethyl Carbonate (DMC) from methyl carbamate and methanol. Among them, La(NO 3 ) 3 presented the best catalytic performance with the DMC yield of 53.7% under suitable reaction conditions. Based on the results of X-ray diffraction, Fourier transform infrared spectroscopy and element analysis, a possible reaction mechanism over lanthanum nitrate was proposed for this reaction.
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synthesis of Dimethyl Carbonate from urea and methanol over zno
Industrial & Engineering Chemistry Research, 2005Co-Authors: Mouhua Wang, Ning Zhao, Wei Wei, Yuhan SunAbstract:The synthesis of Dimethyl Carbonate (DMC) from urea and methanol was investigated, to explore the catalysts and reaction conditions. Among the catalysts, ZnO showed the highest catalytic activity toward DMC synthesis. Based on the experimental investigation, the reaction conditions over ZnO for a batch process were optimized, and the highest DMC yield attained (based on urea) was ∼30%, because of the presence of side reactions. In addition, the reusability test indicated that ZnO had high stability.
Wei Wei - One of the best experts on this subject based on the ideXlab platform.
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design and control of Dimethyl Carbonate methanol separation via pressure swing distillation
Industrial & Engineering Chemistry Research, 2013Co-Authors: Hongmei Wei, Fukui Xiao, Feng Wang, Junliang Zhang, Bo Liao, Ning Zhao, Wei Wei, Yuhan SunAbstract:Separation of Dimethyl Carbonate/methanol azeotropic mixture by using distillation process has been a hot-point in the study of the synthesis process of Dimethyl Carbonate by urea methanolysis method. Most studies focus on the steady-state design, and only few papers have dealt with the dynamic performance and control of this binary azeotropic system. This paper explores the design and control of pressure-swing distillation systems for separation of Dimethyl Carbonate/methanol. The steady-state and dynamic simulations are carried out with Aspen Plus and Aspen Dynamics. Then, on the basis of the global economical analysis, an optimized separation configuration is proposed. The vital operating parameters and geometric parameters are determined according to the simulation and optimization results. Furthermore, two control strategies, CS1 and CS2, are proposed. With disturbance, the proposed basic control structure (CS1) can only maintains the quality specification of products from the bottom of the first col...
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Design and Control of Dimethyl Carbonate–Methanol Separation via Pressure-Swing Distillation
Industrial & Engineering Chemistry Research, 2013Co-Authors: Hongmei Wei, Fukui Xiao, Feng Wang, Junliang Zhang, Bo Liao, Ning Zhao, Wei Wei, Yuhan SunAbstract:Separation of Dimethyl Carbonate/methanol azeotropic mixture by using distillation process has been a hot-point in the study of the synthesis process of Dimethyl Carbonate by urea methanolysis method. Most studies focus on the steady-state design, and only few papers have dealt with the dynamic performance and control of this binary azeotropic system. This paper explores the design and control of pressure-swing distillation systems for separation of Dimethyl Carbonate/methanol. The steady-state and dynamic simulations are carried out with Aspen Plus and Aspen Dynamics. Then, on the basis of the global economical analysis, an optimized separation configuration is proposed. The vital operating parameters and geometric parameters are determined according to the simulation and optimization results. Furthermore, two control strategies, CS1 and CS2, are proposed. With disturbance, the proposed basic control structure (CS1) can only maintains the quality specification of products from the bottom of the first col...
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design and control of Dimethyl Carbonate methanol separation via pressure swing distillation
Industrial & Engineering Chemistry Research, 2013Co-Authors: Hongmei Wei, Fukui Xiao, Feng Wang, Junliang Zhang, Bo Liao, Ning Zhao, Wei Wei, Yuhan SunAbstract:Separation of Dimethyl Carbonate/methanol azeotropic mixture by using distillation process has been a hot-point in the study of the synthesis process of Dimethyl Carbonate by urea methanolysis meth...
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synthesis of Dimethyl Carbonate from methyl carbamate and methanol over lanthanum compounds
Fuel Processing Technology, 2010Co-Authors: Dengfeng Wang, Fukui Xiao, Wei Wei, Xuelan Zhang, Yangyan Gao, Yuhan SunAbstract:Abstract Various lanthanum compounds were used as the catalyst for the synthesis of Dimethyl Carbonate (DMC) from methyl carbamate and methanol. Among them, La(NO 3 ) 3 presented the best catalytic performance with the DMC yield of 53.7% under suitable reaction conditions. Based on the results of X-ray diffraction, Fourier transform infrared spectroscopy and element analysis, a possible reaction mechanism over lanthanum nitrate was proposed for this reaction.
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synthesis of Dimethyl Carbonate from urea and methanol over zno
Industrial & Engineering Chemistry Research, 2005Co-Authors: Mouhua Wang, Ning Zhao, Wei Wei, Yuhan SunAbstract:The synthesis of Dimethyl Carbonate (DMC) from urea and methanol was investigated, to explore the catalysts and reaction conditions. Among the catalysts, ZnO showed the highest catalytic activity toward DMC synthesis. Based on the experimental investigation, the reaction conditions over ZnO for a batch process were optimized, and the highest DMC yield attained (based on urea) was ∼30%, because of the presence of side reactions. In addition, the reusability test indicated that ZnO had high stability.
Shiro Saka - One of the best experts on this subject based on the ideXlab platform.
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Esterification of glycerol from biodiesel production to glycerol Carbonate in non-catalytic supercritical Dimethyl Carbonate
SpringerPlus, 2016Co-Authors: Zul Ilham, Shiro SakaAbstract:Conversion of glycerol from biodiesel production to glycerol Carbonate was studied by esterification with Dimethyl Carbonate in a non-catalytic supercritical condition. It was found that in a non-catalytic supercritical condition, glycerol at higher purity gave higher yield of glycerol Carbonate at 98 wt% after reaction at 300 °C/20–40 MPa/15 min. The yield of glycerol Carbonate was observed to increase with molar ratio, temperature, pressure and time until a certain equilibrium limit. The existence of impurities such as water and remnants of alkaline catalyst in crude glycerol will direct the reaction to produce glycidol. Although impurities might not be desirable, the non-catalytic supercritical Dimethyl Carbonate could be an alternative method for conversion of glycerol from biodiesel production to value-added glycerol Carbonate.
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two step supercritical Dimethyl Carbonate method for biodiesel production from jatropha curcas oil
Bioresource Technology, 2010Co-Authors: Zul Ilham, Shiro SakaAbstract:This study reports on a novel two-step process for biodiesel production consisting of hydrolysis of oils in sub-critical water and subsequent supercritical Dimethyl Carbonate esterification. This process found to occur optimally at the sub-critical water treatment (270 °C/27 MPa) for 25 min followed by a subsequent supercritical Dimethyl Carbonate treatment (300 °C/9 MPa) for 15 min to achieve a comparably high yield of fatty acid methyl esters, at more than 97 wt%. In addition, the fatty acid methyl esters being produced satisfied the international standard specifications for use as biodiesel fuel. This new process for biodiesel production offers milder reaction condition (lower temperature and lower pressure), non-acidic, non-catalytic and applicable to feedstock with high amount of free fatty acids such as crude Jatropha curcas oil.
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Dimethyl Carbonate as potential reactant in non catalytic biodiesel production by supercritical method
Bioresource Technology, 2009Co-Authors: Zul Ilham, Shiro SakaAbstract:Abstract In this study, the non-catalytic supercritical method has been studied in utilizing Dimethyl Carbonate. It was demonstrated that, the supercritical Dimethyl Carbonate process without any catalysts applied, converted triglycerides to fatty acid methyl esters with glycerol Carbonate and citramalic acid as by-products, while free fatty acids were converted to fatty acid methyl esters with glyoxal. After 12 min of reaction at 350 °C/20 MPa, rapeseed oil treated with supercritical Dimethyl Carbonate reached 94% (w/w) yield of fatty acid methyl ester. The by-products from this process which are glycerol Carbonate and citramalic acid are much higher in value than glycerol produced by the conventional process. In addition, the yield of the fatty acid methyl esters as biodiesel was almost at par with supercritical methanol method. Therefore, supercritical Dimethyl Carbonate process can be a good candidate as an alternative biodiesel production process.
Fukui Xiao - One of the best experts on this subject based on the ideXlab platform.
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Design and Control of Dimethyl Carbonate–Methanol Separation via Pressure-Swing Distillation
Industrial & Engineering Chemistry Research, 2013Co-Authors: Hongmei Wei, Fukui Xiao, Feng Wang, Junliang Zhang, Bo Liao, Ning Zhao, Wei Wei, Yuhan SunAbstract:Separation of Dimethyl Carbonate/methanol azeotropic mixture by using distillation process has been a hot-point in the study of the synthesis process of Dimethyl Carbonate by urea methanolysis method. Most studies focus on the steady-state design, and only few papers have dealt with the dynamic performance and control of this binary azeotropic system. This paper explores the design and control of pressure-swing distillation systems for separation of Dimethyl Carbonate/methanol. The steady-state and dynamic simulations are carried out with Aspen Plus and Aspen Dynamics. Then, on the basis of the global economical analysis, an optimized separation configuration is proposed. The vital operating parameters and geometric parameters are determined according to the simulation and optimization results. Furthermore, two control strategies, CS1 and CS2, are proposed. With disturbance, the proposed basic control structure (CS1) can only maintains the quality specification of products from the bottom of the first col...
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design and control of Dimethyl Carbonate methanol separation via pressure swing distillation
Industrial & Engineering Chemistry Research, 2013Co-Authors: Hongmei Wei, Fukui Xiao, Feng Wang, Junliang Zhang, Bo Liao, Ning Zhao, Wei Wei, Yuhan SunAbstract:Separation of Dimethyl Carbonate/methanol azeotropic mixture by using distillation process has been a hot-point in the study of the synthesis process of Dimethyl Carbonate by urea methanolysis method. Most studies focus on the steady-state design, and only few papers have dealt with the dynamic performance and control of this binary azeotropic system. This paper explores the design and control of pressure-swing distillation systems for separation of Dimethyl Carbonate/methanol. The steady-state and dynamic simulations are carried out with Aspen Plus and Aspen Dynamics. Then, on the basis of the global economical analysis, an optimized separation configuration is proposed. The vital operating parameters and geometric parameters are determined according to the simulation and optimization results. Furthermore, two control strategies, CS1 and CS2, are proposed. With disturbance, the proposed basic control structure (CS1) can only maintains the quality specification of products from the bottom of the first col...
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design and control of Dimethyl Carbonate methanol separation via pressure swing distillation
Industrial & Engineering Chemistry Research, 2013Co-Authors: Hongmei Wei, Fukui Xiao, Feng Wang, Junliang Zhang, Bo Liao, Ning Zhao, Wei Wei, Yuhan SunAbstract:Separation of Dimethyl Carbonate/methanol azeotropic mixture by using distillation process has been a hot-point in the study of the synthesis process of Dimethyl Carbonate by urea methanolysis meth...
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synthesis of Dimethyl Carbonate from methyl carbamate and methanol over lanthanum compounds
Fuel Processing Technology, 2010Co-Authors: Dengfeng Wang, Fukui Xiao, Wei Wei, Xuelan Zhang, Yangyan Gao, Yuhan SunAbstract:Abstract Various lanthanum compounds were used as the catalyst for the synthesis of Dimethyl Carbonate (DMC) from methyl carbamate and methanol. Among them, La(NO 3 ) 3 presented the best catalytic performance with the DMC yield of 53.7% under suitable reaction conditions. Based on the results of X-ray diffraction, Fourier transform infrared spectroscopy and element analysis, a possible reaction mechanism over lanthanum nitrate was proposed for this reaction.
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Esterification of Salicylic Acid with Dimethyl Carbonate over Mesoporous Aluminosilicate
Industrial & Engineering Chemistry Research, 2009Co-Authors: Xiaowei Su, Junping Li, Fukui XiaoAbstract:The synthesis of methyl salicylate (MS) from salicylic acid (SA) and Dimethyl Carbonate (DMC) was performed over a series of mesoporous aluminosilicates. The results showed that mesoporous aluminosilicate was an effective esterification catalyst for the reaction. It was also found that both SA conversion and MS selectivity were closely linked with the intermediate strong acidity and Lewis acidity of catalysts. As a result, the synergistic mechanism was proposed for the esterification of SA with DMC over a mesoporous aluminosilicate.
Ning Zhao - One of the best experts on this subject based on the ideXlab platform.
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design and control of Dimethyl Carbonate methanol separation via pressure swing distillation
Industrial & Engineering Chemistry Research, 2013Co-Authors: Hongmei Wei, Fukui Xiao, Feng Wang, Junliang Zhang, Bo Liao, Ning Zhao, Wei Wei, Yuhan SunAbstract:Separation of Dimethyl Carbonate/methanol azeotropic mixture by using distillation process has been a hot-point in the study of the synthesis process of Dimethyl Carbonate by urea methanolysis method. Most studies focus on the steady-state design, and only few papers have dealt with the dynamic performance and control of this binary azeotropic system. This paper explores the design and control of pressure-swing distillation systems for separation of Dimethyl Carbonate/methanol. The steady-state and dynamic simulations are carried out with Aspen Plus and Aspen Dynamics. Then, on the basis of the global economical analysis, an optimized separation configuration is proposed. The vital operating parameters and geometric parameters are determined according to the simulation and optimization results. Furthermore, two control strategies, CS1 and CS2, are proposed. With disturbance, the proposed basic control structure (CS1) can only maintains the quality specification of products from the bottom of the first col...
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Design and Control of Dimethyl Carbonate–Methanol Separation via Pressure-Swing Distillation
Industrial & Engineering Chemistry Research, 2013Co-Authors: Hongmei Wei, Fukui Xiao, Feng Wang, Junliang Zhang, Bo Liao, Ning Zhao, Wei Wei, Yuhan SunAbstract:Separation of Dimethyl Carbonate/methanol azeotropic mixture by using distillation process has been a hot-point in the study of the synthesis process of Dimethyl Carbonate by urea methanolysis method. Most studies focus on the steady-state design, and only few papers have dealt with the dynamic performance and control of this binary azeotropic system. This paper explores the design and control of pressure-swing distillation systems for separation of Dimethyl Carbonate/methanol. The steady-state and dynamic simulations are carried out with Aspen Plus and Aspen Dynamics. Then, on the basis of the global economical analysis, an optimized separation configuration is proposed. The vital operating parameters and geometric parameters are determined according to the simulation and optimization results. Furthermore, two control strategies, CS1 and CS2, are proposed. With disturbance, the proposed basic control structure (CS1) can only maintains the quality specification of products from the bottom of the first col...
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design and control of Dimethyl Carbonate methanol separation via pressure swing distillation
Industrial & Engineering Chemistry Research, 2013Co-Authors: Hongmei Wei, Fukui Xiao, Feng Wang, Junliang Zhang, Bo Liao, Ning Zhao, Wei Wei, Yuhan SunAbstract:Separation of Dimethyl Carbonate/methanol azeotropic mixture by using distillation process has been a hot-point in the study of the synthesis process of Dimethyl Carbonate by urea methanolysis meth...
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synthesis of Dimethyl Carbonate from urea and methanol over zno
Industrial & Engineering Chemistry Research, 2005Co-Authors: Mouhua Wang, Ning Zhao, Wei Wei, Yuhan SunAbstract:The synthesis of Dimethyl Carbonate (DMC) from urea and methanol was investigated, to explore the catalysts and reaction conditions. Among the catalysts, ZnO showed the highest catalytic activity toward DMC synthesis. Based on the experimental investigation, the reaction conditions over ZnO for a batch process were optimized, and the highest DMC yield attained (based on urea) was ∼30%, because of the presence of side reactions. In addition, the reusability test indicated that ZnO had high stability.