R－X图解法计算多级串联理想混合反应器

论述Ｒ－Ｘ图解法计算多级串联理想混合反应器的基本原理，并结合实例，对Ｒ－Ｘ法的计算步骤予以详细介绍，为多级串联反应器的设计与计算，提供一种新颖适用的图解计算方法。     

多级串联理想混合反应器变型设计方程

多级串联理想混合反应器变型设计方程刘金廷，刘雪雁（吉林工学院化学工程系，长春１３００１２）在用多级串联理想混合反应的操作方程式及求解时，常常为了简化问题令其各级反应器为等容、等温的状况下进行反应。尤其是用公式法计算多级串联理想混合反应器时，又多以一级...     

求多级串联理想混合流反应器的出口浓度——二级可逆反应

在多级串联理想混合流反应器中进行二级可逆反应时,可用图解法和代数法求各级反应器的出口浓度.但图解法不够精确,代数法又费时费力,而且,当反应器个数趋于无穷大时,以上两种方法则无法计算.针对上述两种方法的不足,开发了一种新的方法,即利用C++语言,依据递推关系式编制程序,该程序能够迅速求解,并与计算结果完全一致.该法具有精...     

多级串联釜式反应器的优化设计

对于多级串联釜式反应器,以反应器的总体体积最小为目标函数,利用图解法,确定各釜最佳的出口转化率,从而计算各釜体积。     

混合多级串联反应器在草甘膦生产中的设计和应用

简要介绍了混合多级串联反应器的设计方法。并结合草甘膦的生产特性进行了应用研究，以达到提高生产效率、降低产品成本、增加市场竞争力的目的。     

混合多级串联反应器在草甘膦生产中的设计和应用

简要介绍了混合多级串联反应器的设计方法,结合草甘膦的生产特性进行了水解反应实际应用研究,结果表明采用混合多级串联反应器生产草甘膦减少了设备投资,降低了产品成本,生产状况良好,产品增强了市场竞争力。     

草甘膦水解中混合多级串联反应器的设计和应用

1概述草甘膦是有机磷类丙吸传导性广谱灭生性除草剂,化学名称为N-(膦酸甲基)甘氨酸。草甘膦的使用范围广泛,是目前农药使用量中吨位最大的一个品种,有着较好的市场前景。但随着国内生产厂家的增多,其竞争将越来越激烈,因此提高产品的生产效率,降低成本成为各生产企业竞相研究的重点。     

草甘膦水解中混合多级串联反应器的设计和应用

介绍了草甘膦水解中混合多级串联反应器的设计和应用情况,达到了提高生产效率,降低产品成本,增加市场竞争力的目的.     

串联CSTR的图解求法

介绍了如何根据（－rA）－xA关系进行串联CSTR的图解法计算，该法简单、应用面广。     

Modeling and control of continuous stirred tank reactor for thermal copolymerization

A mathematical model is developed for solution copolymerization in a continuous stirred tank reactor. For the thermal copolymerization of styrene and acrylonitrile (SAN), the kinetic rate expression for thermal initiation is derived by applying the pseudo-steady-state hypothesis to the intermediates, and the kinetic parameters are estimated by experimental investigation. The moment equations of living and dead polymer concentrations are derived by applying the pseudokinetic rate constantmethod. The model is used to calculate the conversion, the copolymer composition, the weight-average molecular weight, and the polydispersity. It is demonstrated that this model can predict the industrial data very well under various operating conditions. The dynamic analysis of the reaction system enables us to determine the polymer properties against the changes in the operation parameters. It is noticed that the monomer conversion is controlled to some extent by the reaction temperature and the feed monomer fraction. The monomer conversion control of a solution copolymerization reactor is treated with different control algorithms. The fuzzy/proportional–integral–derivative controller shows satisfactory performances for both setpoint tracking and disturbance rejection and can be easily applied to continuous polymerization processes. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 67:921–931, 1998     

基于MLD模型的CSTR建模和控制

A novel control strategy for a continuous stirred tank reactor （CSTR） system, which has the typical characteristic of strongly pronounced nonlinearity, multiple operating points, and a wide operating range, is initiated from the point of hybrid systems. The proposed scheme makes full use of the modeling power of mixed logical dynamical （MLD） systems to describe the highly nonlinear dynamics and multiple operating points in a unified framework as a hybrid system, and takes advantage of the good control quality of model predictive control （MPC） to design a controller. Thus, this approach avoids oscillation during switching between sub-systems, helps to relieve shaking in transition, and augments the stability robustness of the whole system, and finally achieves optimal （i.e. fast and smooth） transition between operating points. The simulation results demonstrate that the presented approach has a satisfactory performance.     

Continuous emulsion polymerization of vinyl acetate. I. Operation in a single continuous stirred tank reactor using sodium lauryl sulfate as emulsifier

Continuous emulsion polymerizations of vinyl acetate were carried out at 50 °C in a single continuous stirred‐tank reactor using sodium lauryl sulfate as emulsifier and potassium persulfate as initiator. It was found that (1) the so‐called limit cycles could take place in monomer conversion, the number of polymer particles and the molecular weight of polymers produced under certain operating conditions, (2) the time‐average steady‐state monomer conversion was proportional to the 0.31 power of the emulsifier concentration in the feed, to the 0.50 power of the initiator concentration, to the ?1.0 power of the monomer concentration, and to the 0.90 power of the mean residence time, and (3) the time‐average steady‐state number of polymer particles produced was proportional to the 2.1 power of the emulsifier concentration in the feed, to the ?0.80 power of the initiator concentration, to the 0 power of the monomer concentration, and to the ?0.92 power of mean residence time. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 86: 2748–2754, 2002     

Modeling the continuous melt transesterification of bisphenol-A and diphenyl carbonate in a continuous stirred tank reactor

A model of continuous melt transesterification of bisphenol-A and diphenyl carbonate in a continuous stirred tank reactor is developed using phase equilibria assumption and the method of molecular weight moments. The model equations can be simplified into a polynomial system that has 17 equations and 17 unknowns. Solution of the polynomial system gives out almost every aspects of the continuous transesterification process. Molecular weight and polydispersity index, end group ratio of hydroxyl to phenyl carbonate, contents of molecular species, and lost diphenyl carbonate fractions are studied in different operation parameters.     

搅拌床中甲基氯化铝法甲基三氯硅烷转化反应

针对“直接法”合成二甲基二氯硅烷过程中产生的副产物甲基三氯硅烷（M₁）,在搅拌床反应器中,对甲基氯化铝法甲基三氯硅烷气固相转化反应进行了系统研究.结果表明,该反应经历了约100 min的诱导期后,产物组成趋于稳定.机械搅拌促进了铝粉表面氧化膜的去除和表面更新,使得转化反应无须外加催化剂.提高搅拌速度和反应温度有利于转化反应程度的提高,但存在一个最佳值.原料组成MeCl/M₁摩尔比（m）对转化反应的进行程度和产物组成影响较大,当m＜2.0时,M₁转化率较低,转化产物主要为二甲基二氯硅烷（M₂）和三甲基氯硅烷（M₃）;当m＝2.0时,产物主要为M₃;当m＞2.0时,M₁转化率较高,主要产物为四甲基硅烷（M₄）.采用SEM对反应前后Al粉粒子表面形态进行了表征,探讨了该气固相转化反应的机理和历程.     

多级串联等体积全混流反应器与平推流反应器等效性研究——以二级可逆反应为例

在多级串联全混流反应器中,在等温等容条件下给出了二级可逆反应第Ⅳ级反应器的出口浓度表达式.讨论了在相同操作条件下,达到平推流反应器的转化率所需要的等体积串联全混流反应器的级数Ⅳ;主要考察了正反应速率常数k1、平衡常数K、反应物初始浓度之比M、停留时间τ等因素对N的影响,得出了N与正反应速率常数k1、相平衡常数K以及停留...     

Experimental and theoretical investigation of parametric sensitivity and dynamics of a continuous stirred tank reactor for acid catalyzed hydrolysis of acetic anhydride

The continuous stirred tank reactor is a dynamic system exhibiting nonlinear behavior such as multiplicity and oscillations and, in certain range of operating conditions, may exhibit a parametric sensitivity where small changes in one or more of the input parameters lead to large changes in the output variable. In the present work, hydrolysis of acetic anhydride reaction system was used to demonstrate the existence of parametric sensitivity with respect to the input parameter, the cooling water flow rate. The applications of parametric sensitivity analysis were used for detection of parametric sensitivity in a continuous stirred tank reactor using catalyses hydrolysis of acetic anhydride reaction system. Also, theoretical investigation revealed that the effect of wall capacitance has definite influence on the dynamics of continuous stirred tank reactor. The continuous stirred tank reactor showed parametric sensitivity both in the regions of uniqueness and multiplicity, and a mathematical model was developed for the reactor. The numerically simulated results are in satisfactory agreement with the experimental data.