Experimental Evaluation of Mass Transfer Coefficients from Sour Gas

Chavez, Rosa-Hilda; Guadarrama, Javier de J.

doi:10.1002/ceat.201100431

Cited by 4 publications

(4 citation statements)

References 12 publications

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“…This is often reported in terms of the volumetric mass transfer coefficient, k L a . As previously stated, CO 2 absorption/desorption has been studied using a myriad of reactor types, including but not limited to mechanically agitated tanks, bubble columns, packed‐bed absorption columns, and hollow fibre membranes . The mass transfer performance of most of these reactors/contactors is summarized in a previous work, which in turn highlighted major obstacles when comparing these studies against each other.…”

Section: Methodsmentioning

confidence: 99%

Absorption and desorption of carbon dioxide in several water types

Al‐Hindi

Azizi

2017

Can J Chem Eng

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This study investigated the effect of water type on the rate of CO 2 transfer from/to an aqueous phase with varying degree of water salinity. The absorption and desorption experiments were conducted on reverse osmosis product, brackish well, and brackish water reverse osmosis reject waters as well as seawater in a mechanically agitated tank. Results show that the direction of mass transfer has a major impact on the value of the volumetric mass transfer coefficient, k L a, with the absorption experiments always rendering higher values. Furthermore, k L a values always decreased with salinity in both absorption and desorption experiments until a certain critical salinity value was reached, beyond which mass transfer increased again. However, k L a values were found to decrease continuously with an increase in the water alkalinity in absorption experiments, while no clear conclusion could be drawn for the alkalinity effect in the case of desorption experiments. These observations suggest that the effect of alkalinity should be further investigated to elucidate its impact along with the salinity on the volumetric mass transfer rate.

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Section: Methodsmentioning

confidence: 99%

Absorption and desorption of carbon dioxide in several water types

Al‐Hindi

Azizi

2017

Can J Chem Eng

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“…These contactors include bubble columns, packed‐beds (fixed or rotating), and hollow fibre membranes, among others. [ 11,13,14,20 ] The design of such units, however, remains very difficult due to their complex hydrodynamics. [ 21 ]…”

Section: Introductionmentioning

confidence: 99%

“…These contactors include bubble columns, packed-beds (fixed or rotating), and hollow fibre membranes, among others. [11,13,14,20] The design of such units, however, remains very difficult due to their complex hydrodynamics. [21] Lately, there is a growing interest in tubular reactors equipped with static mixers to process multiphase operations as they present attractive alternatives to conventional units.…”

Section: Introductionmentioning

confidence: 99%

Chemical absorption of CO₂ in alkaline solutions using an intensified reactor

2022

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Capturing carbon dioxide (CO 2 ) emissions from point sources is critical for a sustainable chemical industry. Several techniques have already been developed and the race is ongoing to meet more stringent limitations at lower operating costs. This study presents the capability of a novel, flexible reactor to achieve high absorption rates at very low power consumption. CO 2 absorption in an aqueous sodium hydroxide (NaOH) solution was used as a benchmark. An air-CO 2 stream made of 30% v/v CO 2 was injected co-currently with the aqueous alkaline solution in a tubular reactor equipped with woven mesh mixers. The removal efficiencies were measured along the length of the reactor, which operated at total mean flow velocities ranging between 1-2 m/s and gas phase holdups between 10%-30%. Four different mixer geometries were also tested, and the results were analyzed based on the operating conditions and reactor design configurations. While these studies can be further optimized and potentially applied in carbon capture operations, it was found that more than 96.5% of the CO 2 could be removed using different combinations of mixer geometry and operating conditions. This high removal efficiency was reached within a residence time of 400 ms at a low cost of 23.65 kWh=t CO 2 .

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“…Various separation techniques are applicable for the removal of CO 2 , including adsorption, absorption, and membrane separation [1][2][3]. The removal of CO 2 from NG has been investigated by numerous researchers in terms of adsorbent development, economical separation processes with high performance, and low energy.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Adsorption of CO₂ from Methane: Studies on Mass and Heat Transfer

et al. 2013

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Three-dimensional computational fluid dynamics studies related to dynamics adsorption of CO 2 from natural gas is found to be limited. 3D analyses for dynamics adsorption are substantially crucial to give a better prediction on the adsorption process by considering the actual fluid flow behavior within the packed-bed porous media. A kinetic adsorption model has been integrated in a commercial fluid dynamics simulator to simulate the 3D hydrodynamics and adsorption phenomenon in a zeolite-filled packed column for a CO 2 -methane separation system. The effects of various parameters such as Reynolds number, CO 2 feed concentration, feed temperature, and column dimension on CO 2 adsorption efficiency have been investigated. A correlation for adsorption efficiency based on the CO 2 concentration profiles has been developed and validated. Figure 5. CO 2 concentration factor (C) contours along the bed at different times and feed concentratios; v = 0.35 m s -1 , e = 0.4, l = 8 m, T w = 300 K, T f = 300 K. 282 K. K. Lau et al.

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Experimental Evaluation of Mass Transfer Coefficients from Sour Gas

Cited by 4 publications

References 12 publications

Absorption and desorption of carbon dioxide in several water types

Absorption and desorption of carbon dioxide in several water types

Chemical absorption of CO₂ in alkaline solutions using an intensified reactor

Dynamic Adsorption of CO₂ from Methane: Studies on Mass and Heat Transfer

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Experimental Evaluation of Mass Transfer Coefficients from Sour Gas

Cited by 4 publications

References 12 publications

Absorption and desorption of carbon dioxide in several water types

Absorption and desorption of carbon dioxide in several water types

Chemical absorption of CO2 in alkaline solutions using an intensified reactor

Dynamic Adsorption of CO2 from Methane: Studies on Mass and Heat Transfer

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Product

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Chemical absorption of CO₂ in alkaline solutions using an intensified reactor

Dynamic Adsorption of CO₂ from Methane: Studies on Mass and Heat Transfer