Mathematical modeling of the simultaneous absorption of carbon dioxide and hydrogen sulfide in a hollow fiber membrane contactor

Keshavarz, Peyman; Fathikalajahi, J.; Ayatollahi, Shahab

doi:10.1016/j.seppur.2008.04.008

Cited by 64 publications

(33 citation statements)

References 46 publications

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“…The results showed that the increase in the gas/ liquid flow ratio caused an increase in gas velocity, which decreased the contact time between the gas and liquid phases, and thus limited the reactions of the acid gases with amine solution. This observation is also reported in references 9,13 . Therefore, it will reduce the removal performance of both CO 2 and H 2 S.…”

Section: Effect Of Gas and Liquid Flow Ratesupporting

confidence: 88%

Investigation of H2 S and CO2 Removal from Gas Streams Using Hollow Fiber Membrane Gas–liquid Contactors

Mirfendereski¹

2017

Chem.Biochem.Eng.Q.

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Chemical absorption of H 2 S and CO 2 from CH 4 was carried out in a polypropylene porous asymmetric hollow fiber membrane contactor (HFMC). A 0.5 mol L -1 aqueous solution of methyldiethanolamine (MDEA) was used as chemical absorbent solution. Effects of gas flow rate, liquid flow rate, H 2 S concentration and CO 2 concentration on the H 2 S outlet concentrations and CO 2 removal percentage were investigated.The results showed that the removal of H 2 S with aqueous solution of MDEA was very high and indicated almost total removal of H 2 S. Experimental results also indicated that the membrane contactor was very efficient in the removal of trace H 2 S at high gas/ liquid flow ratio. The removal of H 2 S was almost complete with a recovery of more than 96 %. Using feed gas mixtures containing 5000 ppm H 2 S with CO 2 concentrations in the range of 4-12 vol.%, the outlet H 2 S concentration of less than 1.0 ppm was attained with less than 4.0 vol.% of CO 2 permeated and absorbed.

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Section: Effect Of Gas and Liquid Flow Ratesupporting

confidence: 88%

Investigation of H2 S and CO2 Removal from Gas Streams Using Hollow Fiber Membrane Gas–liquid Contactors

Mirfendereski¹

2017

Chem.Biochem.Eng.Q.

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“…A method of equation-tearing procedure was applied to linearize the nonlinear equations and to reduce the running time of computers [15]. The detail of this linearization can be found in the previous studies [5,28] and is not repeated here. The Thomas algorithm [29] was applied to solve tridiagonal matrix of linearized algebraic equations in radial direction for each node in axial direction.…”

Section: Methods Of Solutionmentioning

confidence: 99%

Removal of carbon dioxide by aqueous amino acid salts using hollow fiber membrane contactors

Masoumi

Rahimpour

Mehdipour

2016

Journal of CO2 Utilization

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“…CO 2 removal from gas using monoethanolamine as the extractant in the membrane contactor has been studied by Bottino et al [6], while experimental study and numerical analysis of carbon dioxide removal from water in liquid-liquid extraction mode have been performed by Agrahari et al [7]. Keshavarz et al [8] have presented a mathematical model for membrane contactors used for the simultaneous absorption of CO 2 and H 2 S from gaseous feed to diethanolamine (DEA) solution. McDermott et al [9] studied the removal of volatile and semi-volatile organic components from water using membrane contactors in the vacuum sweep mode.…”

Section: Introductionmentioning

confidence: 99%

Mathematical Analysis of Removal of Dissolved Acidic Gases from Aqueous Stream Using Membrane Contactor

Rawat¹,

Agrahari²,

Pandey³

et al. 2013

IJCEA

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Abstract-A mathematical analysis was performed on an acid-gas removal process applied to an aqueous feed stream using a hollow fiber membrane contactor in liquid-liquid extraction mode. Furthermore, a comparison was made between the obtained simulation results and with the earlier published experimental results. The model development is based on a process setup wherein synthetic wastewater feed solution was considered to be passing through the lumen side and later recycled back to the feed tank. On the shell side of the membrane contactor, an extractant was circulated in the counter direction. The model is developed considering radial and axial diffusion mechanisms and convection on the lumen side. Mass transfer across the pore by diffusion from Knudsen and bulk flow has also been considered. The partial differential equations obtained, were solved by converting them into a number of ordinary differential equations by using the finite difference method. The model was solved and simulated using MATLAB. The effect of various membrane contactor parameters such as the number of fibers and their effective lengths on the removal of gases have also been studied in this analysis. The simulated results obtained were observed to be in excellent agreement with the experimental results obtained for the acidic gas, H 2 S.Index Terms-Waste water treatment, membrane separation, hollow fiber membrane contactor, degasification of water, modeling and simulation.

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Mathematical modeling of the simultaneous absorption of carbon dioxide and hydrogen sulfide in a hollow fiber membrane contactor

Cited by 64 publications

References 46 publications

Investigation of H2 S and CO2 Removal from Gas Streams Using Hollow Fiber Membrane Gas–liquid Contactors

Investigation of H2 S and CO2 Removal from Gas Streams Using Hollow Fiber Membrane Gas–liquid Contactors

Removal of carbon dioxide by aqueous amino acid salts using hollow fiber membrane contactors

Mathematical Analysis of Removal of Dissolved Acidic Gases from Aqueous Stream Using Membrane Contactor

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