反应精馏技术的研究现状及应用

对反应精馏技术的研究现状及其应用进行了综述,介绍了反应精馏塔及催化剂,对催化剂床中传质及流体力学特征,数学模型和反应精馏塔设计方程进行了总结;同时介绍了反应精馏技术的应用现状及其可能的应用领域。     

反应精馏技术的研究现状及应用进展

反应精馏是化学反应和精馏过程耦合为一体的单元操作,已成为当今的重要研究领域。本文对反应精馏技术的研究现状及其应用进行了综述,介绍了反应精馏塔及催化剂,对催化剂床中传质及流体力学特征,数学模型和反应精馏塔设计方程进行了总结;同时介绍了反应精馏技术的应用现状及其可能的应用领域．     

反应精馏技术的研究现状及其应用

对反应精馏技术的的研究进展以及使用现状进行综述,对反应精馏塔及催化剂进行了一个详细的介绍,对反应塔中常见的几种处理模式和方法进行阐述,总结了所运用到的数学模型和反应;反应精馏技术的研究进展以及使用的现状进行综述,并对未来发展的可能方向进行了预测。     

催化精馏技术及其应用进展

叙述了催化精馏技术的原理和催化精馏塔的结构,重点介绍了板式塔装填、填充式装填、悬浮式装填和催化剂散装四种催化剂填料方式,阐述了催化精馏技术在酯化反应、水解反应、烷基化反应和其他反应中的应用,对催化精馏技术的发展进行了总结.     

我国催化精馏技术研究及应用进展

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。     

反应分离一体化技术研究现状及应用进展

近年来快速发展起来的反应分离一体化技术以其能在生产中极大地降低投资和生产操作成本的优势引起了人们的广泛关注。本文综述了反应与分离一体化技术研究的现状及应用进展,介绍了反应精馏技术中的精馏塔结构及催化剂填料、数学模型和工业应用,同时介绍了膜化学反应器技术的研究现状和应用。     

国内催化精馏技术研究进展及应用

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。     

反应精馏技术及其应用

反应精馏技术是伴有化学反应的精馏技术，它具在可提高反应的选择性和转化率，降低能耗，节省投资等特点，本文简单介绍了的反应精馏的优点，反应精馏塔的结构及其应用。     

催化精馏技术的进展概况

对催化精馏过程的进展进行了综述。介绍了催化精馏塔、催化剂的装填方式、催化精馏塔数学模型的研究现状。     

浅谈催化精馏技术及其研究进展

叙述了催化精馏技术的概念、优点及其作用原理,简单介绍了催化精馏技术中催化精馏塔的类型、催化剂的种类及其装填方式以及催化精馏技术在酯化、醚化、异构化、烷基化等方面的应用,以及近年来研发的一些新技术。     

Synthesis and Analysis of Reactive Dividing-Wall Distillation for Methylal Production

By means of water as an extractant, the two-feed and three-feed reactive distillation production processes of methylal are synthesized and analyzed. The effects of water on the methylal reactive distillation (RD) production is investigated. Thermally coupled two-feed and three-feed reactive dividing-wall columns are proposed and analyzed. The two-feed and three-feed RD processes are compared. The three-feed thermally coupled reactive dividing-wall column (DWC) exhibits an outstanding ability of energy and cost savings. Results from this work could be helpful for further development and application of RD or reactive DWC in methylal production.     

反应/分离集成系统塔板组成线设计法研究

反应/分离系统的集成是对现有工业过程进行强化的主要途径之一。文中在精馏塔板组成线的基础上,推导出了反应精馏塔板组成线基本方程及设计可行性判据,提出了给定进料和一个目标产品组成的塔板组成线反应精馏设计的新策略,并对非理想性较强的MTBE反应体系进行了实例设计计算。结果表明,提出的设计策略能同时获得多组可行设计方案,可有效地对单一和集成型反应精馏塔进行设计,结果与Aspen P lus的模拟结果吻合较好。     

Nonlinear model based control of two-product reactive distillation column

Nonlinear feedback control scheme for reactive distillation column has been proposed. The proposed control scheme is derived in the framework of Nonlinear Internal Model Control. The product compositions and liquid and vapor flow rates in sections of the reactive distillation column are estimated from selected tray temperature measurements by an observer. The control scheme is applied to an example reactive distillation column in which two products are produced in a single column and the reversible reaction A+B=C+D occurs. The relative volatilities are favorable for reactive distillation so that the reactants are intermediate boilers between the light product C and the heavy product D. Ideal physical properties, kinetics, and vapor-liquid equilibrium are also assumed. It is shown that the proposed control scheme keeps tight product composition control.     

Design and control of reactive distillation for hydrolysis of methyl lactate

Esterification of raw lactic acid from fermentation broth and then hydrolysis of lactate ester in reactive distillation column is an effective process for purification of lactic acid. Reactive distillation for hydrolysis of methyl lactate is studied. First, the thermodynamic properties and reaction kinetics are analyzed; then the reactive distillation column is designed based on the objective function total annual cost. The effects of tray number of rectifying section, tray number of reactive section, and feed location on the total annual cost are investigated. And a dual-temperature control structure is proposed for the optimal reactive distillation column, and the results show that it works quite well for this hydrolysis system.     

Simulation studies on reactive distillation for synthesis oftert-amyl ethyl ether

In this work, a reactive distillation column in which chemical reactions and separations occur simultaneously is applied for the synthesis of tert-amyl ethyl ether (TAEE) from ethanol (EtOH) and tert-amyl alcohol (TAA). A rate-based kinetic model for liquid-phase etherification and an equilibrium stage model for separation are employed to study the reactive distillation. The calculation is carried out using the commercial software package, Aspen Plus. Simulations are performed to examine the effects of design variables, i.e., a number of rectifying, reaction and stripping stages on the performance of reactive distillation column. It has been found that an optimal column configuration for the TAEE production under the study is designed with no rectifying, 4 reaction and 8 stripping stages. With such an appropriate specification of the reactive distillation column, the effects of various operating variables on the TAA conversion and TAEE selectivity are further investigated and the results have shown that the reflux ratio and operating pressure are the most important factors to the operation of the reactive distillation.     

反应精馏隔壁塔的模拟研究

以乙酸甲酯酯转换体系为例提出了一种反应精馏隔壁塔的设计和优化方法,应用该方法可将常规双塔反应精馏序列转化为反应精馏隔壁塔并保证各操作参数的最优值.首先通过在反应精馏塔与甲醇塔之间交换汽液相物流来实现反应精馏隔壁塔的简捷设计;然后利用Aspen Plus模拟软件,对常规反应精馏序列和反应精馏隔壁塔进行了模拟分析;最终以2...     

乙酰丙酸乙酯的反应精馏模型及隔壁塔节能优化设计

乙酰丙酸乙酯是一种潜在的生物质基平台化合物,在工业上具有很高的应用价值。乙酰丙酸乙酯传统的生产方法主要为间歇反应法,效率较低,产物分离困难且工艺流程较长。因此,本文提出了反应精馏工艺生产乙酰丙酸乙酯,在以中试实验结果为依据的基础上,使用Aspen Plus模拟软件建立了工艺流程,并考察了回流比、进料位置、进料摩尔比以及理论塔板数等关键参数,得到了常规单塔反应精馏工艺生产乙酰丙酸乙酯的最优配置。而后,为了得到纯度大于99.9%的乙酰丙酸乙酯,本文进一步提出了反应精馏双塔精制流程以及反应精馏隔壁塔流程,并通过对两种流程所得到的产品纯度以及能耗的对比,验证了反应精馏隔壁塔工艺生产乙酰丙酸乙酯的有效性以及在节能方面较大的优势。     

Impact of mass transfer coefficient correlations on prediction of reactive distillation column behaviour

A significant part of the safety analysis of a reactive distillation column is the identification of multiple steady states and their stability. A reliable prediction of multiple steady states in a reactive distillation column is influenced by the selection of an adequate mathematical model.For modelling reactive distillation columns, equilibrium (EQ) and nonequilibrium (NEQ) models are available in the literature. The accuracy of the nonequilibrium stage model seems to be limited mainly by the accuracy of the correlations used to estimate the mass transfer coefficient and interfacial area.The binary mass transfer coefficients obtained from empirical correlations are functions of the tray design and layout, or of the packing type and size, as well as of the operational conditions and physical properties of the vapour and liquid mixtures.In this contribution, the nonequilibrium model was used for the simulation of a reactive distillation column. For prediction of the binary mass transfer coefficient for a sieve tray, four correlations were chosen to show their impact on the prediction of the reactive distillation column behaviour. As a model reactive distillation system, the synthesis of methyl tertiary-butyl ether (MTBE) was chosen. The steady-state analysis and the dynamic simulation of the model system were done. Qualitative differences between the steady states were predicted using the chosen correlations.