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Modeling and simulation of an industrial‐scale parex process
Author(s) -
Silva Marta S. P.,
Rodrigues Alírio E.,
Mota José P. B.
Publication year - 2015
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.14732
Subject(s) - upstream (networking) , scale (ratio) , process (computing) , unit (ring theory) , unit operation , process engineering , process simulation , engineering , chemical plant , simulation , computer science , environmental engineering , mathematics , chemical engineering , telecommunications , physics , mathematics education , quantum mechanics , operating system
The Parex unit for industrial‐scale purification of p‐xylene was studied through detailed simulation and the accuracy of the developed model tested against real industrial data. Starting from a comprehensive analysis of the construction and operation of the industrial unit, a simulation model was developed that incorporates the existing three major types of dead volumes: bed lines, which connect the beds to the rotary valve, circulation lines, which connect adjacent adsorbent chambers, and bed‐head dead volumes, which are located upstream of each bed due to the existence of internals. By gathering operation data and surveys in the pumparound line and in the extract stream, three case studies were defined and compared with simulation results. The model is capable of predicting the performance of the industrial unit. Further simulations were made and compared with plant data to assess the effect of adsorbent capacity loss on the long‐term performance of the unit. © 2015 American Institute of Chemical Engineers AIChE J , 61: 1345–1363, 2015