IRI - A reduced-order model for real-time NMPC of ethanol steam reformers

Publication

A reduced-order model for real-time NMPC of ethanol steam reformers

Conference Article

Conference

IFAC International Symposium on Advanced Control of Chemical Processes (ADCHEM)

Edition

2021

Pages

103-108

Doc link

http://dx.doi.org/10.1016/j.ifacol.2021.08.226

File

Download the digital copy of the doc pdf document

Authors

Abstract

One of the approaches to green energy of interest in recent years is through the use of hydrogen technologies in which the waste product of combustion is water rather than carbon dioxide, nitrous oxides, and other pollutants generated by the burning of hydrocarbon fuels. Ethanol steam reformers is one of the primary technologies with the potential to generate hydrogen efficiently and reliably. This article investigates the design of nonlinear optimal feedback control systems for ethanol steam reformers based on mechanistic models described by a system of nonlinear partial differential-algebraic equations, aka singular/descriptor systems. The mechanistic models are too complicated to simulate in real-time using the standard numerical discretization methods, much less to directly incorporate such models as nonlinear constraints into mechanistic model-based nonlinear model predictive control formulations. This article employs a rather sophisticated multivariate form of the method of characteristics to reformulate the nonlinear constraints into a much simpler form amenable to real-time control implementations.

Author keywords

Modeling for control optimization, Descriptor systems, Model reduction of distributed parameter systems, Energy systems, Nonlinear model reduction, Model reduction

Scientific reference

P. Reyero, X. Yu, C. Ocampo-Martínez and R. Braatz. A reduced-order model for real-time NMPC of ethanol steam reformers, 2021 IFAC International Symposium on Advanced Control of Chemical Processes, 2021, Venice, Italy, pp. 103-108.