Dynamic operability analysis of an industrial membrane separation process

Yee, Kevin; Bao, Jie; Wiley, Dianne E.

doi:10.1016/j.ces.2011.11.046

Cited by 4 publications

(1 citation statement)

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“…For instance, (Nguyen et al, 2016) stated that the pilotscale membranes may have 30-45% lower water permeability than observed in laboratory membrane units. Thus, the mathematical modeling of diafiltration processes has focused, for example, on studying intermittent diluent addition scenarios in different levels of details (Wang et al, 2008;Tan and Franzreb, 2022), prediction of fouling dynamics (López-Murillo et al, 2021), or integrated process and control design (Hunter, 2000;Yee et al, 2012;Saltık et al, 2017). This study takes the first steps related to the integrated process and control design of a diafiltration plant processing hemicelluloses from lignocellulosic biomass.…”

Section: Introductionmentioning

confidence: 99%

Dynamic modeling of diafiltration system for a biorefinery application

Ohenoja¹,

Uusitalo²,

Valkama³

et al. 2022

Linköping Electronic Conference Proceedings

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Application of membrane technologies in biorefinery processes has been studied for some time. The heterogenous nature of biorefinery steams, however, results in unideal performance of membrane systems and considerable fouling of membranes, which is decreasing the efficiency of separation. As a part of BioSPRINT project, this study focuses on application of separating monomeric sugars from the hemicelluloses fraction of lignocellulosic biomass, where pressure-driven nanofiltration with several diafiltration stages has been proposed for the separation task. Diafiltration is required to overcome the decreased separation efficiency when the retentate concentrations and viscosity increases. A lumped parameter dynamical model of the diafiltration plant is applied. The key model parameters are identified from experimental data from a laboratory membrane unit to reflect the considered biorefinery process. The model is then simulated to study the sensitivity of the uncertain model parameters (related to membrane fouling, solute concentrations, viscosity, and mass transfer coefficients) to the diafiltration plant performance (product purity, operation time). The model is implemented in the MATLAB®/Simulink environment. The simulation results are expected to identify potential sources of scale-up challenges in biorefinery-related membrane applications. The developed dynamic model also allows to investigate different operational strategies of diafiltration plants in the future.

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Section: Introductionmentioning

confidence: 99%

Dynamic modeling of diafiltration system for a biorefinery application

Ohenoja¹,

Uusitalo²,

Valkama³

et al. 2022

Linköping Electronic Conference Proceedings

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Diafiltration

Kovács

Czermak

2013

Encyclopedia of Membrane Science and Technology

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Membrane filtration represents a unique separation technique as it can be employed for both concentrating and purifying a multicomponent process stream. To achieve these twin‐objectives, diafiltration is required. Diafiltration is an operation mode of a pressure‐driven membrane filtration process in which a diluant (i.e.,∼water or any other solvent or buffer) is added to the process liquor in order to enhance the degree of separation of membrane‐retained macrosolutes from membrane‐permeable microsolutes. Depending on the separation target, diafiltration may be performed with microfiltration, ultrafiltration, nanofiltration, or reverse osmosis membranes. The separation target can be reached by using either batch or continuous processing mode. Diafiltration is an indispensable tool in separating multicomponent process streams and widely used in the food and beverage, chemical, biotechnological, and pharmaceutical industries. This article introduces the reader to the fundamentals of diafiltration. It provides a brief survey on the most important applications and discusses the various configurations, general design equations, control strategies, and diluant utilization strategies used in batch and continuous diafiltration practice

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