Simulation and Optimization of Small Oxygen Pressure Swing Adsorption Units

Santos, João C.; Portugal, A.F.; Magalhaes, F. D.; Mendes, Adélio

doi:10.1021/ie049701l

Cited by 28 publications

(22 citation statements)

References 17 publications

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“…Most PSA studies use industrial scale systems with multiple adsorber columns, but a few study small scale PSA systems. Santos et al developed a model for small‐scale 2‐bed PSA MOC process with a storage tank. They use this model to optimize the PSA design, but they do not include any type of feedback control.…”

Section: Background Information and Existing Literaturementioning

confidence: 99%

Multivariable model predictive control of a novel rapid pressure swing adsorption system

2017

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A multivariable model predictive control (MPC) algorithm is developed for the control and operation of a rapid pressure swing adsorption (RPSA)‐based medical oxygen concentrator. The novelty of the approach is the use of all four step durations in the RPSA cycle as independent manipulated variables in a truly multivariable context. The RPSA has a complex, cyclic, nonlinear multivariable operation that requires feedback control, and MPC provides a suitable framework for controlling such a multivariable system. The multivariable MPC presented here uses a quadratic optimization program with integral action and a linear model identified using subspace system identification techniques. The controller was designed and tested in simulation using a complex, highly coupled, nonlinear RPSA process model. The model was developed with the least restrictive assumptions compared to those reported in the literature, thereby providing a more realistic representation of the underlying physical phenomena. The resulting MPC effectively tracks set points, rejects realistic process disturbances and is shown to outperform conventional PID control. © 2017 American Institute of Chemical Engineers AIChE J, 64: 1234–1245, 2018

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Section: Background Information and Existing Literaturementioning

confidence: 99%

Multivariable model predictive control of a novel rapid pressure swing adsorption system

2017

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“…On the other hand, dozens of scientific publications exist in the open access, which describe, in fact, the same mathematical model of pressure swing adsorption, built using the diffusion equation in a moving gas component [9,10,11,12].…”

Section: Introductionmentioning

confidence: 99%

Wave approach for modeling pressure swing adsorption

Кравченко

2018

RET

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A new approach to modeling of the pressure swing adsorption (PSA) based on a wave method for calculating nonstationary periodic mass transfer processes is proposed. The analysis of solutions for plants designed to produce oxygen from air is given. The conditions necessary for highly efficient operation of PSA plants are formulated. The results of calculations for various brands of zeolites are followed, allowing optimizing a choice of zeolite for the set working conditions. Хвильовий підхід до моделювання короткоциклової безнагрівної адсорбціїЗапропоновано новий підхід до моделювання короткоциклової безнагрівної адсорбції (КБА) на основі хвильового методу для обчислення нестаціонарних періодичних процесів масо-переносу. Наведений аналіз рішень для установок, які призначені для отримання кисню з повітря. Сформульовані умови високоефективної роботи установок КБА. Наведені результати розрахунків для різних марок цеолітів, які дозволяють оптимізувати вибір цеоліту для заданих умов роботи. Ключові слова: Короткоциклова безнагрівна адсорбція, Адсорбція, Цеоліт, Кисень, Азот. __________________________________________________________________

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“…Detailed description of zeolites structure is accessible in relevant sources [2,3]. There are a lot of studies which have been done on the separation of oxygen from air [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Modeling of Nitrogen Adsorption on Zeolite 13X Bed

Kakav¹,

Shokroo²,

Baghbani³

et al. 2017

FMRIJ

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Generally, the common adsorption processes of air separation are divided into two categories: The first category is consists of processes which make use of zeolites as nitrogen adsorbent under the equilibrium conditions and oxygen is a process product. The second one contains processes which utilize Carbon Molecular Sieves (CMSs) as oxygen adsorbent. Zeolite 13X is the most commonly adsorbent used in the air separation for oxygen production. In this work, nitrogen adsorption behavior on zeolite 13X bed is simulated. Desorption and adsorption dynamics of zeolite 13X was investigated in order to study the behavior of this zeolite. The simulation results showed that the high Roll-up Phenomena occurs for oxygen than nitrogen. There is a large mass transfer zone (MTZ) for zeolite 13X. Therefore, the adsorption rate of zeolite 13X is high. The main drop of nitrogen concentration in the outlet of zeolite 13X occurs at the time of about 125 seconds. Nitrogen concentration in the outlet of zeolite 13X approaches zero after about 180 seconds. Keywords:

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Simulation and Optimization of Small Oxygen Pressure Swing Adsorption Units

Cited by 28 publications

References 17 publications

Multivariable model predictive control of a novel rapid pressure swing adsorption system

Multivariable model predictive control of a novel rapid pressure swing adsorption system

Wave approach for modeling pressure swing adsorption

Dynamic Modeling of Nitrogen Adsorption on Zeolite 13X Bed

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