Batch-to-batch optimization of cobalt oxalate synthesis process using modifier-adaptation strategy with latent variable model

R Jia, Z Mao, F Wang, D He - Chemometrics and Intelligent Laboratory …, 2015 - Elsevier
A batch-to-batch optimization strategy is proposed to cope with the presence of data-driven
model uncertainty, and applied to a cobalt oxalate synthesis process. In order to overcome …

Optimization of simple batch crystallization systems considering crystal shape and nucleation

HJ Pan, JD Ward - Industrial & Engineering Chemistry Research, 2020 - ACS Publications
Optimal control theory (OCT) is applied to derive nearly analytical solution to single-and
multiobjective dynamic optimization problems for a two-dimensional batch crystallization …

Pareto-optimal fronts for simple crystallization systems using Pontryagin's minimum principle

YT Tseng, HJ Pan, JD Ward - Industrial & Engineering Chemistry …, 2019 - ACS Publications
Pontryagin's minimum principle is applied to determine Pareto-optimal fronts for
multiobjective optimization of seeded batch crystallization processes. For cases with two …

Self‐correcting modifier‐adaptation strategy for batch‐to‐batch optimization based on batch‐wise unfolded PLS model

R Jia, Z Mao, F Wang - The Canadian Journal of Chemical …, 2016 - Wiley Online Library
The problem of optimizing a batch process under model uncertainty using a batch‐wise
unfolded PLS (BW‐PLS) model‐based modifier‐adaptation (MA) strategy is described. The …

Experimental study by online measurement of the precipitation of nickel hydroxide: Effects of operating conditions

E Weiwei, J Cheng, C Yang, Z Mao - Chinese Journal of Chemical …, 2015 - Elsevier
The objective of this work is using the online measurement method to study the process of
precipitation of nickel hydroxide in a single-feed semi-batch stirred reactor with an internal …

Sequential and orthogonalized partial least-squares model based real-time final quality control strategy for batch processes

R Jia, Z Mao, F Wang, D He - Industrial & Engineering Chemistry …, 2016 - ACS Publications
In this work, the problem of driving a batch process to a desired final product quality using
data-driven model based midcourse correction (MCC) is described. Specifically, we adapt a …

Neural network based modeling and control for a batch heating/cooling evaporative crystallization process

W Daosud, J Thampasato, P Kittisupakorn - Engineering Journal, 2017 - engj.org
Crystallization processes have been widely used for separation in many fields to provide a
high purity product. In this work, dynamic optimization and neural network (NN) have been …

Hierarchical batch-to-batch optimization of cobalt oxalate synthesis process based on data-driven model

R Jia, Z Mao, D He, F Chu - Chemical Engineering Research and Design, 2019 - Elsevier
The synthesis process has been widely used in cobalt hydrometallurgical industry. To better
operate the cobalt oxalate synthesis process, a data-driven model based hierarchical batch …

Input trajectory adjustment within batch runs based on latent variable models

Z Zhao, P Wang, Q Li, F Liu - Industrial & Engineering Chemistry …, 2019 - ACS Publications
In a batch process, the input trajectory is usually predefined before the beginning of a batch
run through the product design according to the desired output. However, within a batch run …

Combining just‐in‐time modelling and batch‐wise unfolded PLS model for the derivative‐free batch‐to‐batch optimization

R Jia, Z Mao, F Wang - The Canadian Journal of Chemical …, 2018 - Wiley Online Library
In this work, a derivative‐free batch‐to‐batch optimization method is proposed. In order to
conquer the difficulties in building a first principal model, a local batch‐wise unfolded PLS …