共查询到19条相似文献,搜索用时 93 毫秒
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综述了催化精馏技术的原理和催化精馏塔的结构,介绍了国内催化精馏技术在催化精馏塔、催化剂和数学模型方面的研究进展及其工业应用情况。 相似文献
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引 言近年来 ,在传统催化精馏的基础上提出了一种悬浮床催化精馏的新技术[1,2 ] .悬浮床催化精馏不仅继承了传统催化精馏具有的节省投资、提高反应转化率和选择性、操作条件易控制等优点 ,而且克服了催化剂元件的预制、装卸、更换比较麻烦的缺点 .因此 ,悬浮床催化精馏被认为是一种具有研究价值和应用前景的新技术 ,将其应用于负载杂多酸催化的苯与十二烯的烷基化反应已经过小试验证[2 ] .目前 ,催化精馏的模拟研究大都采用非平衡级数学模型[3~ 5] .因为平衡级模型与工业实际精馏塔的运行结果常常不甚相符 ,已经不能准确模拟催化精馏因反… 相似文献
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浆料催化精馏合成碳酸二甲酯的模拟研究 总被引:2,自引:0,他引:2
以浆料催化精馏酯交换合成碳酸二甲酯实验为基础,应用Aspen Plus软件建立了浆料催化精馏合成过程的稳态模型并进行研究。研究结果表明,模型的计算值与实验值吻合良好。通过计算机模拟还得到了实验难以测定的塔内温度分布、塔内气液相流率及组成和碳酸二甲酯在各板的生成速率的变化规律。 相似文献
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The catalytic packing is the core component of the catalytic distillation, and how the catalyst exists in the packing has significant influence on the process. To investigate the effect of catalyst packings on the catalytic distillation process, the classical ethyl acetate reactive distillation system was utilized, and a supported catalytic packing(SCP) was prepared in comparison with the conventional tea-bag catalytic packing(TBP). Laboratory scale experiments showed that the ethyl acetate conv... 相似文献
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Cyclic distillation uses a periodic operation mode that leads to key benefits, such as increased column throughput, lower energy requirements and much higher separation performance. By integrating chemical reactions with cyclic distillation, a novel process intensification approach is possible – catalytic cyclic distillation – which outperforms classic reactive distillation.This paper is the first to describe the catalytic cyclic distillation process and to develop a rigorous mathematical model. By means of a case study involving a simple reaction system, the model is used to demonstrate the key benefits of this operation mode. In addition, the synthesis of dimethyl ether by catalytic cyclic distillation is considered, for which a design algorithm is suggested. Investigation of the column behavior reveals the coexistence of two periodic states, one of them being unstable. 相似文献