Analysis of an industrial adsorption process based on ammonia chemisorption: Modeling and simulation

Cardenas, Cristian; Latifi, Abderrazak M.; Vallières, Cécile; Marsteau, Stéphanie; Sigot, Léa

doi:10.1016/j.compchemeng.2021.107474

Cited by 25 publications

(4 citation statements)

References 21 publications

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“…Langmuir isotherm mostly applies to chemisorption on a monolayer. Activated carbon is highly porous and is a well-known adsorbent used in industry as a filter [ 77 ]. The dependence of the isotherm model on the structure of the adsorbent can also be supported by the study of Ma et al [ 45 ], who used potato starch modified with high temperature to increase its porosity.…”

Section: Discussionmentioning

confidence: 99%

interactions of model cationic drug with newly synthesized starch derivatives

Kobryń,

Zięba,

Rzepczyńska

et al. 2023

ADMET DMPK

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Background and purpose: The aim of the work was to compare the interactions of three newly synthesized non-toxic starch derivatives, with varied anionic and non-ionic functional groups with methylene blue (MB) as a model cationic drug, and selection of starch derivative with highest affinity to the MB. Experimental approach: The native potato starch (SN), modified via acetylation (SM1), esterification and crosslinking (SM2) and crosslinking (SM3), was evaluated in MB adsorption studies and assessed by FTIR, PXRD, and DSC. Key results: The adsorption of MB on SM2 and SM3 matched the BET isotherm model, which confirmed physisorption on the low-porous surface. In the case of SM1, adsorption took place via electrostatic attraction between the heterogeneous adsorbent surface and the adsorbate, as demonstrated by the Freundlich plot. The FTIR confirmed vibrations assigned to N=C stretching bonds at 1600 cm-1 in the case of MB adsorbed on the SN and SM2. The most intense PXRD peaks belonged to SN and the least to SM2. In the DSC study, the thermal stability via ΔT was assessed, with SM2 of lowest ΔT value (179.8 °C). Conclusion: SM2 presented the best adsorption capacity, followed by SM3 and the weakest SM1. The interactions were confirmed in the adsorption studies and may reflect applications of the modified starches as drug carriers. In the FTIR study, a probable interaction between the OH- groups of SM2 and N+ of MB was revealed. The most amorphous structure was shown for SM2, which was correlated with the lowest thermal stability provided by the DSC study.

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Section: Discussionmentioning

confidence: 99%

interactions of model cationic drug with newly synthesized starch derivatives

Kobryń,

Zięba,

Rzepczyńska

et al. 2023

ADMET DMPK

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“…The optimization algorithm employed in this study utilizes the moving asymptote (MMA) method, which is available within the COMSOL Multiphysics software. The identified parameters’ accuracy is assessed through the use of confidence intervals (CIs), as follows: p * 1 − α t = p * prefix± t normals ( n m − n p , α t / 2 ) diag ( COV false( p * false) ) with: COV ( p * ) ≈ J mse n normalm − n normalp false( J false( p * false) normalT J ( p * ) false) − 1 …”

Section: Model Developmentmentioning

confidence: 99%

Section: Model Developmentmentioning

confidence: 99%

Modeling of Water Vapor Adsorption and Desorption in an Industrial Medical Air Dryer

Cardenas

Farrusseng

Daniel

2023

Ind. Eng. Chem. Res.

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This study presents the development of a dynamic multiscale model to simulate the adsorption and desorption processes in a fixed bed for medical air drying. The model includes equations of mass balance, thermodynamics, hydrodynamics, and adsorption/desorption kinetics. The temperature-dependent Toth–Aranovich–Donohue equation is used to approximate the equilibrium relationship between water vapor and activated alumina (hopcalite). Measurements of the breakthrough curve at different water vapor concentrations and gas flow rates can be used to determine kinetic resistances such as axial dispersion, external film mass transfer, pore diffusion, and internal mass transfer and thus to determine the limiting resistance of the process. The model predictions agree well with the experimental results, which are supported by performance indices and confirmed by additional breakthrough curves for validation. The validated model proves effective in predicting water vapor adsorption and desorption breakthrough curves on adsorbents considering concentration, flow rate, and temperature and serves as a valuable tool for the development and optimization of commercial PSA columns with multiple adsorption layers.

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“…The model allows evaluating the performance of the system in various scenarios with the aim of improving working conditions and provides support in the validation and verification of a proposal when required [29]. On the other hand, the application of a model allows predicting the performance of the design of experimental or under construction systems, since the manipulation of the variables and properties of the model is cheaper than creating a complete system, allowing possible improvements of the real system.…”

Section: A2 Benefits Of Implementing a Modelmentioning

confidence: 99%

BPM and cycle counting in the design of a model to increase the perfect order: a case study in a company in the commercial sector

Lopez¹,

Barahona²,

Altamirano-Flores³

2022

Proceedings of the 2nd LACCEI International Multiconference on Entrepreneurship, Innovation and Regional Development (LEIRD 202

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This paper aims to evaluate the level of delivery compliance in an industrial tools trading company in Metropolitan Lima, based on the decrease in sales observed in the year 2020. For this reason, a quantitative and qualitative diagnosis of the company was carried out, where a low level of delivery compliance was observed, which is generating an economic impact of about 15% of the company's annual income. Furthermore, this problem is measured through the technical gap of the percentage of perfect deliveries, which is currently 64.5%, below the current market. In this sense, a model was proposed to increase the percentage of perfect orders through the implementation of Cyclic Counting, 5S, AHP and BPM in order to increase the Inventory Record Accuracy (IRA), avoid confusion in the selection of products, make an adequate selection and evaluation of suppliers and identify those activities that do not add value. In this way, the simulation of the model will be carried out and a decrease in late and incomplete deliveries will be observed, obtaining a value of 74.3% of perfect orders and a 25% increase in sales.

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Analysis of an industrial adsorption process based on ammonia chemisorption: Modeling and simulation

Cited by 25 publications

References 21 publications

interactions of model cationic drug with newly synthesized starch derivatives

interactions of model cationic drug with newly synthesized starch derivatives

Modeling of Water Vapor Adsorption and Desorption in an Industrial Medical Air Dryer

BPM and cycle counting in the design of a model to increase the perfect order: a case study in a company in the commercial sector

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