Design and Control of Acetaldehyde Production Process

Authors

  • K. Nagamalleswara Rao Bapatla Engineering College (Autonomous), Bapatla, Andhra Pradesh, India
  • M. Venkata Ratnam Bapatla Engineering College (Autonomous), Bapatla, Andhra Pradesh, India
  • P. Rajendra Prasad AU College of Engineering, Andhra University, Vizag, India
  • V. Sujatha AU College of Engineering, Andhra University, Vizag, India

Keywords:

Apen Plus, Aspen Dynamics, temperature control loop, U.S. Patent 6, 121, 498

Abstract

This paper discusses the steady state and dynamic simulations of acetaldehyde production process by using Aspen Plus and Aspen Dynamics. The model developed in the present study is the modification of the process developed by Eastman Chemical Company of U.S. Patent 6,121,498. The proposed design consists of a FEHE (feed effluent heat exchanger), reactor, absorption column, compressors and two distillation columns. Acetic acid reacts with hydrogen and gives acetaldehyde as main product and ethanol, ethyl acetate, acetone, and water as byproducts. The paper is divided into two stages. In the first stage, the entire process plant is developed for steady-state simulations and in the second stage, dynamic simulations are performed by providing decentralized controllers for the entire plant. Tray temperature control loop and composition control loop are designed to maintain final product purity. Results of dynamic simulation are analyzed for different process conditions. The proposed plant with control structure performs very well in rejecting various disturbances while maintaining the acetaldehyde product purity at 95.17 mol%, with a settling time of less than 9 h.

Author Biographies

  • K. Nagamalleswara Rao, Bapatla Engineering College (Autonomous), Bapatla, Andhra Pradesh, India
    Department of Chemical Engineering
  • M. Venkata Ratnam, Bapatla Engineering College (Autonomous), Bapatla, Andhra Pradesh, India
    Department of Chemical Engineering
  • P. Rajendra Prasad, AU College of Engineering, Andhra University, Vizag, India
    Department of Chemical Engineering
  • V. Sujatha, AU College of Engineering, Andhra University, Vizag, India
    Department of Chemical Engineering

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Published

2019-06-06

Issue

Vol. 1 No. 1 (2014)

Section

Articles

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