Uncertainty quantification via bayesian inference using sequential monte carlo methods for CO2 adsorption process |
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Authors: | Jayashree Kalyanaraman Yoshiaki Kawajiri Ryan P Lively Matthew J Realff |
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Affiliation: | School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA |
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Abstract: | This work presents the uncertainty quantification, which includes parametric inference along with uncertainty propagation, for CO2 adsorption in a hollow fiber sorbent, a complex dynamic chemical process. Parametric inference via Bayesian approach is performed using Sequential Monte Carlo, a completely parallel algorithm, and the predictions are obtained by propagating the posterior distribution through the model. The presence of residual variability in the observed data and model inadequacy often present a significant challenge in performing the parametric inference. In this work, residual variability in the observed data is handled by three different approaches: (a) by performing inference with isolated data sets, (b) by increasing the uncertainty in model parameters, and finally, (c) by using a model discrepancy term to account for the uncertainty. The pros and cons of each of the three approaches are illustrated along with the predicted distributions of CO2 breakthrough capacity for a scaled‐up process. © 2016 American Institute of Chemical Engineers AIChE J, 62: 3352–3368, 2016 |
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Keywords: | CO2 capture uncertainty quantification Sequential Monte Carlo parallel computing Bayesian inference hollow fiber sorbent |
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