Iranian Journal of Chemical Engineering (IJChE)
Scientific Journal

Screening of important factors affecting the process of ammonia synthesis by Plackett-Burman method and process optimization with RSMScreening the Important Factors Affecting the Process of Ammonia Synthesized by the Plackett-Burman Method and the Process Optimization with RSM

Document Type : Regular Article

Authors

A. H. Oudi 1
A. Irankhah 2

1 Department of Chemical Engineering, Faculty of Engineering, University of Kashan, Kashan, Iran

2 Hydrogen and Fuel Cell Research Lab., Chemical Engineering Dep., Engineering Faculty, University of Kashan

https://doi.org/10.22034/ijche.2022.342066.1433
Abstract
The optimization of the ammonia synthesis plant to increase the production of ammonia is studied in this line of research. In this paper, the steady-state ammonia synthesis is simulated using the Aspen HysysV.11 software. By comparing the simulation results with the industrial information, a mean relative error of 7.71 % was obtained, which indicated the high accuracy of the simulation. Then, four effective variables were selected from among 11 independent variables by the Plackett-Burman method. The effects of the Hydrogen flow in the feed stream, Recycle stream pressure, Feed stream temperature, and input temperature of the third reactor were investigated, and the response surface design method of the central composite design was performed to plant optimize. It is obtained that the Hydrogen flow in the feed stream is equal to 6255 , the feed stream pressure is equal to 205 bar, the temperature of the excess stream inlet in the first reactor is equal to 663 K, and the temperature of the stream inlet of the second reactor is 677.5 K which increased the ammonia production by 7.5 %.

Keywords

Ammonia Synthesis
Optimization
Response Surface Design
Central Composite Design
Simulation

Subjects

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Iranian Journal of Chemical Engineering (IJChE)
Volume 19, Issue 2
Spring 2022
Pages 3-20

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