| 尿素醇解法合成碳酸二甲酯催化精馏工艺的模拟 |
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| 引用本文： | 王峰,赵宁,李军平,吴都督,魏伟,孙予罕. 尿素醇解法合成碳酸二甲酯催化精馏工艺的模拟[J]. 石油化工, 2008, 37(4): 359 |
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| 作者姓名： | 王峰 赵宁 李军平 吴都督 魏伟 孙予罕 |
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| 作者单位： | 1. 中国科学院,山西煤炭化学研究所煤转化国家重点实验室,山西,太原,030001;中国科学院,研究生院,北京,100039
2. 中国科学院,山西煤炭化学研究所煤转化国家重点实验室,山西,太原,030001 |
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| 基金项目： | 国家科技支撑计划重大项目(2006BAC02A08) |
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| 摘 要： | 采用非平衡级模型对尿素醇解法合成碳酸二甲酯(DMC)催化精馏工艺的塔内组分、流量及温度分布进行模拟,以Max-well-Stefan方程计算汽液组分的传质速率和各组分的Murphree级效率。计算结果表明,不同组分的Murphree级效率差别较大。催化精馏塔的反应段、精馏段和提馏段温度分别为180.2,136.1,150.0℃,模型预测结果与实测值吻合较好。模拟与实验结果均表明,在1.0MPa压力下,升高反应温度,DMC收率增加,而反应段汽液流量减小。对于不同的反应温度,精馏段温度受组分沸点限制,保持为136.0℃。在1.0MPa压力下,最佳反应段温度应控制在180.0～185.0℃之间,DMC收率为49.29%～57.91%。
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| 关 键 词： | 尿素醇解法 催化精馏 非平衡级模型 碳酸二甲酯 氨基甲酸甲酯 |
Non-Equilibrium Stage Model for Dimethyl Carbonate Synthesis by Urea Methanolysis in Catalytic Distillation Tower |
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| Wang Feng,,Zhao Ning,Li Junping,Wu Dudu,Wei Wei,Sun Yuhan. Non-Equilibrium Stage Model for Dimethyl Carbonate Synthesis by Urea Methanolysis in Catalytic Distillation Tower[J]. Petrochemical Technology, 2008, 37(4): 359 |
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| Authors: | Wang Feng Zhao Ning Li Junping Wu Dudu Wei Wei Sun Yuhan |
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| Affiliation: | Wang Feng1,2,Zhao Ning1,Li Junping1,Wu Dudu1,Wei Wei1,Sun Yuhan1(1.State Key Laboratory of Coal Conversion,Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan Shanxi 030001,China,2.Graduate University of Chinese Academy of Sciences,Beijing 100039,China) |
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| Abstract: | Non-equilibrium stage model was developed to simulate catalytic distillation for synthesis of dimethyl carbonate by urea methanolysis.Mass transfer rate of vapor-liquid and Murphree stage efficiency were calculated by Maxwell-Stefan equations.Murphree stage efficiencies show large difference for different components.The predicted and experimental temperatures for rectifying section,reaction zone and stripping section accord satisfactorily,which are 180.2,136.1 and 150.0 ℃ respectively.Under pressure of 1.0 MPa,yield to DMC increase with rise of reaction temperature,whereas vapor and liquid flow rates of components decrease.Under this pressure,for different reaction temperatures,temperature in rectifying section keeps at about 136.0 ℃ due to restraint posed by boiling points of the components.The best reaction temperature should be controlled in range of 180.0-185.0 ℃ and yield to DMC is 49.29%-57.91%. |
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| Keywords: | urea methanolysis catalytic distillation non-equilibrium stage model dimethyl carbonate methyl carbamate |
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