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Liaoyang, China

An W.,Ocean University of China | Jiang J.,Ocean University of China | Lin Z.,Ocean University of China | Bie H.,Ocean University of China | Zhu J.,Liaoning Oxiranchem Group
Huaxue Fanying Gongcheng Yu Gongyi/Chemical Reaction Engineering and Technology | Year: 2016

In order to develop the new model and experimental research of ethoxylation process, a pilot-scale three-section tubular reactors was proposed and built for the synthesis of ethylene glycol monoethyl ether (EGMEE) from ethylene oxide (EO) and ethanol. Aspen Plus software platform was used to carry out the simulation of the process. The key operation parameters including EO feed location, feed flow rate, molar feed ratio of ethanol to EO and ways of heat exchange were examined to investigate their effects on EO conversion, the selectivity of EGMEE and hot point temperature so as to obtain the optimum operation mode and operation parameters. The simulation results showed that there exists a complex trade-off between reaction and heat transfer in tubular reactors. The profile of EO concentration along the tube was the key factor to EO conversion, selectivity of EGMEE, reaction heat removal and process safety. Using multistage charge of EO and multistage cooling were important means to improve the stability and safety of the addressed reactor process. © 2016, Editorial Board of Journal of Chemical Reaction Engineering and Technology. All right reserved. Source

Lin Z.,Ocean University of China | An W.,Ocean University of China | Yuan L.,Ocean University of China | Cai H.,Ocean University of China | Zhu J.,Liaoning Oxiranchem Group
Huagong Xuebao/CIESC Journal | Year: 2015

To obtain the optimum distribution of liquid holdup or catalyst volume in the reactive zone for the design of a reactive distillation (RD) column considering selectivity targets, a design and optimization framework based on the combination of exergy loss analysis and process simulation were proposed. An exergy calculation model was established, including both physical and chemical exergy values, according to which the causes of exergy loss could be revealed with insights that provided the evolutionary direction of optimization. By linking the reaction volume distribution with exergy loss, the design of a reactive distillation column with the minimum reboiler heat duty could be accomplished by using the proposed optimization methodology. The proposed methodology was validated by the application to a reactive distillation column for producing ethylene glycol (EG) by hydration of ethylene oxide (EO). The optimized reaction volume distribution could reduce total energy consumption by 18%, compared with the commonly used even reaction volume design. In addition, the effect of energy saving obtained in this work was better than that reported in literature. © All Rights Reserved. Source

An W.,Ocean University of China | Lin Z.,Ocean University of China | Chen J.,Ocean University of China | Zhu J.,Liaoning Oxiranchem Group
Industrial and Engineering Chemistry Research | Year: 2014

A novel approach to removing water from near-azeotropic ethanol-water mixtures is proposed based on the hydration of ethylene oxide (EO) to produce ethylene glycol (EG) in a reactive distillation (RD) column. Steady-state simulations using the Aspen Plus software package were carried out to investigate the feasibility of the suggested approach, and a sensitivity analysis was carried out to obtain the optimal design parameters. The results showed that, using the optimal operating conditions, a reactive distillation column is capable of circumventing the azeotropic limitation to obtain anhydrous ethanol. Compared with traditional approaches, the proposed approach is promising because of its great potential for reducing energy consumption and capital costs. © 2014 American Chemical Society. Source

Lin Z.,Ocean University of China | An W.,Ocean University of China | Xu Y.,Ocean University of China | Zhu J.,Liaoning Oxiranchem Group
Computer Aided Chemical Engineering | Year: 2015

This work introduces an efficient approach to the conceptual design of an internally heat-integrated reactive distillation column (HIRDiC) synthesizing ethylene glycol (EG) through the hydration of ethylene oxide (EO). A systematic method is proposed to obtain a feasible physical configuration with maximum possible extent of heat integration, in which the column diameter, the number of panels and the panel size on each plate are iteratively examined and determined according to thermodynamic and hydraulic analysis. Evaluated by the total annualized capital cost (TAC), the comparison results showed that neither of the two commonly used heat distribution schemes, i.e. uniform heat transfer area and uniform heat duty distribution, was as good as the design acquired from the proposed methodology. © 2015 Elsevier B.V. Source

An W.Z.,Ocean University of China | Meng X.,Ocean University of China | Bi D.W.,Liaoning Oxiranchem Group | Zhu J.M.,Liaoning Oxiranchem Group
Computer Aided Chemical Engineering | Year: 2012

The production of ethylene glycol monobutyl ether (EGMBE) from ethylene oxide (EO) and n-butanol was studied in a catalytic distillation (CD) column using a base catalyst immobilized in a structured packing. A pilot plant CD packed column been built up for experimental investigations and a steady-state mathematical model was developed to investigate the basic laws of the CD column. The results revealed that the CD process offers potential advantages for EGMBE production, and a 99% conversion of EO and 91% selectivity of EGMBE could be achieved simultaneously that was otherwise not possible with the traditional reactors. © 2012 Elsevier B.V. Source

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