Removal of MDEA foam creators using foam fractionation: Parametric study coupled with foam characterization

Alhseinat, Emad; Amr, Mahmoud; Jumah, Rami; Banat, Fawzi

doi:10.1016/j.jngse.2015.06.050

Cited by 13 publications

(5 citation statements)

References 10 publications

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“…The final surfactant concentration in the bubble surface can be given according to its adsorption isotherm, the rate of mass transfer in the gas-liquid interface and the process operating parameters. The timed variation of the surfactant concentration can be obtained by mass balance equations in the liquid column [10,[32][33][34][35][36][37][38].…”

Section: Introductionmentioning

confidence: 99%

Ascertainment of Surfactin Concentration in Bubbles and Foam Column Operated in Semi-Batch

Gonçalves

Santana

2019

Processes

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This paper describes a mathematical model for the convection, diffusion, and balance phenomena for predicting the depletion curves, i.e., variations in the timed surface-active molecule concentration for fractionation processes in bubbles and foam column, operated in semi-batch. The model was applied for the purification of the surfactin solution and the results were compared with experimental data. Gibbs adsorption curves were obtained for the biosurfactant at different temperatures, and then adjusted with estimated parameters, according to the Langmuir adsorption model. The gas bubble sizes were optically determined. The isotherm adsorption parameters and bubble average diameter are crucial for the attainment of the depletion curves, generated by the model described. The results demonstrate that the process is most effective when operating a column with reduced gas flow and low initial concentration. A top product with two or thirty times greater concentration than the initial one was achieved and the highest biosurfactant concentrations were attained for higher operating temperatures. It was also observed that bubble diameter increased with a higher gas flow. The adjustment obtained for the adsorption curves of Gibbs was satisfactory. Therefore, there was evidence that surfactin molecules adsorb in monolayers in the liquid–gas interface.

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Section: Introductionmentioning

confidence: 99%

Ascertainment of Surfactin Concentration in Bubbles and Foam Column Operated in Semi-Batch

Gonçalves

Santana

2019

Processes

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“…3b), while, 0.1 wt.% HCB in presence of fresh MDEA (50 wt.%) solution showed foaming only at higher nitrogen flow rates (Keewan et al, 2018a). The surface tension of the industrial real lean MDEA solution in the presence of 0.05 wt.% HCB corrosion inhibitor was found to be 42.83 mN/m and decreased to 40.23 mN/m at 0.1 wt.% HCB, respectively (Alhseinat et al, 2015a).…”

Section: In Presence Of Hcbmentioning

confidence: 93%

“…While, fatty acid based corrosion inhibitors having chemical name (Bis(2-Hydroxyethyl)Cocoalkylamine; BHCL) contains oxygen and nitrogen atoms which is adsorbed on the metal surface to block the active corrosion sites (El-Haddad, 2013). It has also presumed that corrosion inhibitors play main role in the foaming tendency of the alkanolamine gas sweetening unit (Alhseinat et al, 2015a). Foaming is mainly caused by contaminants that include corrosion inhibitors regularly used for pipelines, amine degradation products, suspended solids like iron (II) sulfide which increases the stability of the foam, contaminant chemicals from boiler feed water treatment, foreign matters, and antifoam agents if used in excess (Abry and Dupart, 1995;Al Dhafeeri, 2007;Alhseinat et al, 2015a,b;Kohl and Nielsen, 1997).…”

Section: Introductionmentioning

confidence: 99%

Foaming of industrial lean methyldiethanolamine solution in the presence of hydrocarbon and fatty acid based corrosion inhibitors

Keewan

Banat

Pal

et al. 2018

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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In natural gas sweetening alkanolamine processes one of the regularly used chemical is the corrosion inhibitor. For better operation of the plant it is essential to understand the effect of their presence on foaming of industrial lean Methyldiethanolamine (MDEA) used as solvents at different temperatures. This study aimed at investigating the effect of HydroCarbon Based (HCB) and fatty acid based corrosion inhibitor having chemical name Bis(2-Hydroxyethyl)Cocoalkylamine (BHCL) on the foaming tendency of industrial real lean MDEA solutions. Experiments were conducted with different operating parameters, including liquid volume of the solution, foaming time, flow rate of nitrogen gas, concentration of the corrosion inhibitors, temperature of the solution, and gas diffuser pore size using the Foam Scan instrument. With the increase in solution volume and foaming time foaming happens to be more. The foaming tendency of lean MDEA solutions decreased with increasing temperature in absence of corrosion inhibitors but showed different behavior in their presence. At small diffuser pore size and high gas flow rate, the final foam volume increased in the presence of HCB but decreased with the BHCL inhibitor. Optimizing the operating parameters to minimize foaming was verified to be a function of the type of inhibitor used.

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“…Considerable work has been carried out to study the effects of contaminants (e.g., liquid hydrocarbons, carboxylic acids, corrosion inhibitors, fine particulates, amine degradation products, and process parameters) on the foaming behavior and solution physical properties (e.g., viscosity, density, and surface tension) − as well as defoaming means. − However, in fact, more effort should be made to identify the sources of foam and reduce their impact or further eliminate them. Unfortunately, due to the complexity of the contaminants and the interference of the MDEA matrix, the isolation, identification, and quantification of the organic contaminants in amine solution remain a challenge.…”

Section: Introductionmentioning

confidence: 99%

Identification and Quantification of Organic Contaminants and Evaluation of Their Effects on Amine Foaming in the Natural Gas Sweetening Industry

et al. 2022

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Contamination is a leading cause of corrosion, foaming, and amine-absorption capacity limitation, predominantly foaming. There is currently an urgent need to identify the sources of amine foaming and eliminate them or reduce their impacts. Gas chromatography–mass spectrometry (GC-MS) and a sample pretreatment method were developed to identify and quantify the organic contaminants. Linear hydrocarbons (C12–C22), long-chain carboxylic acids and esters, alcohol ethoxylates, and benzene derivatives were detected, characterized, and quantified in amine solutions. Furthermore, the effects of the contaminant concentrations on foaming behavior were also investigated by adding those contaminants. The results reveal that the main issue of foaming is due to the presence of unsaturated fatty acids and alcohol ethoxylates, even with a small amount of 10 ppm, whereas benzene derivatives like methylpyridine, quinoline, methyl naphthalene, benzyl alcohol, octahydroacridine, and linear hydrocarbons have little effect on amine foaming, even with an amount up to 2000 ppm. Therefore, it is necessary to monitor the existence and content of these surface-active contaminants.

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Removal of MDEA foam creators using foam fractionation: Parametric study coupled with foam characterization

Cited by 13 publications

References 10 publications

Ascertainment of Surfactin Concentration in Bubbles and Foam Column Operated in Semi-Batch

Ascertainment of Surfactin Concentration in Bubbles and Foam Column Operated in Semi-Batch

Foaming of industrial lean methyldiethanolamine solution in the presence of hydrocarbon and fatty acid based corrosion inhibitors

Identification and Quantification of Organic Contaminants and Evaluation of Their Effects on Amine Foaming in the Natural Gas Sweetening Industry

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