3 years ago

Development and Validation of a Reduced-Index Dynamic Model of an Industrial High-Purity Column

Development and Validation of a Reduced-Index Dynamic
Model of an Industrial High-Purity Column
Galo A. C. Le Roux, Jose O. A. Matias, Misagh Ebrahimpour
A depropanizer column is a high purity distillation unit, whose modeling is challenging due to its high nonlinear behavior and intricate dynamics. Also, depending on the assumptions, a differential algebraic equation (DAE) system of high index can arise in the modeling of the column. Such systems create significant difficulties to numerical simulation. Phenomenological hydraulic relationships can be used to avoid the index problems. However, these relationships may rely on unknown and arbitrarily assumed parameters and project details. This paper presents an alternative modeling approach called dynamic design using proportional action (DDPA), which is used to simplify the hydraulic and pressure drop relation for a distillation unit. The DDPA approach generates a reduced index dynamic model by adding equations similar to a proportional controller with arbitrarily large gain. A depropanizer column was modeled using DDPA, and the model was validated with real process data obtained in an industrial-scale depropenizer column located at Refinaria de Paulínia, Paulínia, São Paulo, Brazil, and owned by Petrobras S.A. The results show that the model with DDPA is able to predict the actual column dynamic behavior properly.

Publisher URL: http://dx.doi.org/10.1021/acs.iecr.7b02789

DOI: 10.1021/acs.iecr.7b02789

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.