周兴贵
主要从事非定态反应过程模型化和优化,间歇反应过程控制。
个性化签名
- 姓名:周兴贵
- 目前身份:
- 担任导师情况:
- 学位:
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学术头衔:
博士生导师, 教育部“新世纪优秀人才支持计划”入选者
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学科领域:
化学工程基础学科
- 研究兴趣:主要从事非定态反应过程模型化和优化,间歇反应过程控制。
周兴贵,男。华东理工大学教授,博士生导师。1966年出生,1996年毕业于华东理工大学,获博士学位。博士论文于1999年被评为全国优秀博士论文。1995年在美国弗吉尼亚大学化学工程系学习和工作,2002年作为高级访问学者在法国里昂过程工程与自动化研究所开展合作研究。1999年被评为上海市优秀青年教师,2001年被评为上海市教育委员会“曙光“学者。现工作于化学工程联合国家重点实验室,并任实验室副主任。主要从事非定态反应过程模型化和优化,间歇反应过程控制。在国内外期刊杂志上发表论文40余篇。
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主页访问
2639
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0
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成果阅读
507
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成果数
10
【期刊论文】Studies on paired packed-bed electrode reactor: Modeling and experiments
周兴贵, Xin-Sheng Zhang, Guo-Bin Wu, Ping Ding, Xing-Gui Zhou, Wei-Kang Yuan*
Chemical Engineering Science 54(1999)2969-2977,-0001,():
-1年11月30日
Experiments are carried out in a paired packed-bed electrode reactor with the cathodic reduction of potassium ferricyanide coupled with the anodic oxidation of potassium ferrocyanide as the working system. Eight probes are used to determine the potential distribution. A two-dimensional model is developed and solved by the finite element method. Good agreement is observed between the experimental data and the model predictions for reactors of different sizes and operating conditions. The effect of the operating variables (cell voltage, electrolyte velocity, reactant inlet concentration and electrolyte conductivity) and the sizes of the electrodes on the potential and concentration distributions are investigated by simulation.
Paired packed-bed electrode reactor, Electrode reactor model, Potassium ferricyanide, Potassium ferrocyanide, Electrochemical reaction
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200下载
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【期刊论文】Simulation and optimization of a coupled reactor/column system for trioxane synthesis
周兴贵, Ming Hu, Xing-Gui Zhou and Wei-Kang Yuan*
Chemical Engineering Science 54(1999)1353-1358,-0001,():
-1年11月30日
A model for trioxane synthesis in a coupled reactor/column system is developed. The performance of the coupled system, in terms of conversion, time/space yield and energy utilizing efficiency is investigated by simulation. Results show that if the heat input is given, there exists an optimal reflux ratio at which the time/space yield and the energy utilizing efficiency reach their maxima. As for design case, when the heat input and the reflux ratio are fixed, there exists an optimal number of trays: more trays give no improvement on the time/space yield and the energy efficiency, while less trays decrease the time/space yield and the energy efficiency significantly. Experiments are carried out to show the validity of the simplified model.
coupled reactor/, column system,, trioxane synthesis,, time/, space yield,, energy efficiency,, trioxane,, formaldehyd
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61浏览
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243下载
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【期刊论文】Optimizing control of a wall-cooled fixed-bed reactor
周兴贵, Xing-Gui Zhou, Liang-Hong Liu, Wei-Kang Yuan*
Chemical Engineering Science 54(1999)2739-2744,-0001,():
-1年11月30日
A novel on-line optimizing control strategy for wall-cooled fixed-bed reactors is presented. It is essentially a nonlinear model predictive algorithm in which the profit is uniquely expressed as the objective function, instead of a square sum of the deviations between model predicted outputs and a desired output variable trajectory. Excessive bed temperature is avoided by setting a constraint on the maximum reactor temperature. Excellent performance including fast tracking to the optimum operating condition and small overshooting of the reactor temperature has been demonstrated by taking advantage of a dynamic KL-NN reactor model.
Optimizing control, On-line optimization, Fixed-bed reactor, Predictive control, K-L expansion, Neural networks
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126下载
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【期刊论文】Optimal control of batch electrochemical reactor using K-L expansion
周兴贵, X. G. Zhou, X. S. Zhang, X. Wang, Y. C. Dai, W.-K. Yuan*
Chemical Engineering Science 56(2001)1485-1490,-0001,():
-1年11月30日
A control vector parameterization approach using the Karhunen-Loeve (K-L) expansion for optimal control is presented. Optimal control profiles at different initial conditions are represented bya truncated K-L expansion and the optimal control is thus transformed into a parametric optimization with the K-L coefficient(s) as the optimization variable(s). Closed-loop optimal control therefore becomes feasible because the number of optimization variables is minimized. The presented approach is demonstrated on a batch electrochemical reactor in which reduction of oxalic acid glyoxalic acid is carried out under conditions with known or unknown disturbance, or electrode deactivation. The closed-loop control with the K-L expansion outperforms the open-loop optimal control with verylittle computational efiort.
Optimal control, Batch process, Discontinuous process, K-L expansion, Electrochemical reactor
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49浏览
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120下载
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【期刊论文】Modeling silver catalyst sintering and epoxidation selectivity evolution in ethylene oxidation
周兴贵, X.G. Zhou, W.K. Yuan*
Chemical Engineering Science 59(2004)1723-1731,-0001,():
-1年11月30日
Catalyst sintering is a slow complex process which may last for years but is contributed by physical processes of atomic femtosecond scale. In this article, sintering caused silver particle growth is considered to be the result of random migration and coalescence, on the basis of which a random walk model is proposed. Simulation results show that the particle size evolution can be well fitted by generalized power law expression, indicating that the random walk model is valid for sintering processes with di8erent sintering rates and time scales. With the assumption of identical grain sizes, changes in the specific surface intergrain boundary length during particle sintering are predicted by the random walk model and the epoxidation rate is related to the specific surface intergrain boundary length in terms of a selectivity factor. The results elucidate quite well the phenomenon of nonmonotonic change of the selectivity during silver catalyst sintering.
Ethylene epoxidation, Silver catalysts, Sintering, Intergrain boundary, Random walk
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59浏览
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774下载
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【期刊论文】MODELING OF A FIXED-BED REACTOR USING THE K-L EXPANSION AND NEURAL NETWORKS
周兴贵, XING-GUI ZHOU, LIANG-HONG LIU, YIN-CHUN DAI AND WEI-KANG YUAN*, J. U HUDSON
Chemical Engineering Science, Vol. 51, No.10, pp. 2179-2188, 1996,-0001,():
-1年11月30日
Karhunen-Loeve expansion and feedforward neural networks are combined together in modeling a wall cooled fixed-bed reactor for its on-line performance prediction. The K-L expansion is employed as a preprocessor of neural networks while the latter is used to geaserate the coefficients of the K-L expansion, The performance of the KL-NN model is investigated by both experimentation and simulation with benzene oxidation as a working system. It is shown that the method is effective for on-line prediction of the bed temperatures. Our conclusions are more important than just that one term can be used. Sometimes it might be two or three, but the method desctribed in the paper is still powerful.
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44浏览
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73下载
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周兴贵, Gang Qian, Xing-Gui Zhou*, Ling-Bo Zhu and Wei-Kang Yuan
Condensation Process for Production of High Molecular Weight PLLA Vol. 23, No.6, 2003,-0001,():
-1年11月30日
In this paper a direct condensation process is presented for the production of high molecular weight poly (L-lactic acid) (PLLA). It constitutes two steps: pre-polymerization in melt state and post-polymerization in solid state. The distinct feature of this new process lies in the second step, where water, the byproduct of polycondensation, is removed by a dehydrant. Continuous vacuum supply or purging by inert gases is avoided. Through this process, we obtain a PLLA product with molecular weight higher than 300,000, characterized by low monomer content, high crystallinity and small distribution index.
PLLA, solid-state polycondensation, closed system
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46浏览
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95下载
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【期刊论文】Control Vector Parametrization with Karhunen-Lo
周兴贵, Xing-Gui Zhou* and Wei-Kang Yuan
Ind. Eng. Chem. Res. 2004, 43, 127-135,-0001,():
-1年11月30日
Control vector parametrization is one of the most frequently used techniques for determining numerically the optimal control profile for batch process optimization. In this article, we suggest the Karhunen-Lo
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【期刊论文】A NEW ON-LINE PARAMETER ESTIMATION STRATEGY FOR FIXED-BED REACTORS
周兴贵, LIANG-HONG LIU, XING-GUI ZHOU AND WEI-KANG YUAN*
Chemical Engineering Science, Vol. 51. No.11, pp. 3071-3076, 1996,-0001,():
-1年11月30日
This paper develops a new on-line parameter estimation strategy, which takes advantage of BFGS formula to update the inverse Hessian matrix, and one-dimensional search to accelerate the tracking speed. The dynamic model for fixed-bed reactors is lumped to a proper form for identification by double collocation. The gradients of the quadratic objective function with respect to the estimated parameters are obtained in a more accurate way. The method needs low intensive computation, proved to be superior to the traditional method, i.e. the reursive least squares algorithm with forgetting factor, in terms of the speed of tracking, robustness in the presence of errors of the model parameters, and the ability to handle nonlinearity of the fixed-bed reator.
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76浏览
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83下载
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【期刊论文】A hybrid neural network-first principles model for fixed-bed reactor
周兴贵, Haiyu Qi, Xing-Gui Zhou, Liang-Hong Liu, Wei-Kang Yuan*
Chemical Engineering Science 54(1999)2521-2526,-0001,():
-1年11月30日
In the present work, we combine first principles, in the form of mass and energy balance equations, with artificial neural networks (ANNs) as estimators for some of the important process parameters in modeling a wallcooled fixed-bed reactor. Experiments were carried out in a pilot wall-cooled fixed-bed reactor with benzene oxidization to maleic anhydride as a working reaction to show the performance of the proposed hybrid models. Compared with the two-dimensional pseudo-homogeneous models, the hybrid models predict equally well, but are simpler in structure and therefore easier to meet the real-time requirements of control and on-line optimization.
Hybrid model, Fixed-bed reactor, Fixed-bed reactor model, Neural networks, Hybrid modeling approach, Benzene oxidation
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38浏览
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74下载
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