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Real‐time multirate state estimation in a pilot‐scale polymerization reactor
Author(s) -
Zambare Neeraj,
Soroush Masoud,
Grady Michael C.
Publication year - 2002
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.690480512
Subject(s) - monomer , gel permeation chromatography , estimator , molar mass distribution , polymer , polymerization , chemistry , gravimetry , chromatography , mathematics , statistics , engineering , organic chemistry , geotechnical engineering , reservoir modeling
Real‐time implementation of a robust multirate state estimator on a continuous stirred‐tank, free‐radical, styrene polymerization reactor is presented. The estimator is designed based on a first‐principles model of the process. It has integral action that allows for robust estimation of the process states. The estimator calculates frequent robust estimates of polymer weight‐average and number‐average molecular weights and monomer concentration. These are estimated from frequent online measurements of the reactor temperature, and infrequent offline and delayed measurements of polymer weight‐average and number‐average molecular weights and monomer concentration. In‐frequent measurements of monomer concentration are obtained by gas chromatography and gravimetry, and those of weight‐average and number‐average molecular weights by gel permeation chromatography.