Advances in Liquid Absorbents for CO2 Capture: A Review

Rosli, Aishah; Ahmad, Abdul Latif; Kiang, Lim Jit; Low, Siew Chun

doi:10.21315/jps2017.28.s1.8

Cited by 27 publications

(16 citation statements)

References 53 publications

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“…Several researchers have reported the use of monoethanolamine (MEA) absorbent in carbon capture [34,39,40]. This requires high energy during regeneration [41] and reacts fast with CO 2 [42] compared to other solvents reported. Fast reactions are often mass transfer limited, even at molecular level, as molecules do not have enough time to diffuse before they react, leading to a micromixing controlled system [26].…”

Section: Absorbent Selectionmentioning

confidence: 99%

Process intensification technologies for CO2 capture and conversion – a review

2020

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With the concentration of CO 2 in the atmosphere increasing beyond sustainable limits, much research is currently focused on developing solutions to mitigate this problem. Possible strategies involve sequestering the emitted CO 2 for long-term storage deep underground, and conversion of CO 2 into value-added products. Conventional processes for each of these solutions often have high-capital costs associated and kinetic limitations in different process steps. Additionally, CO 2 is thermodynamically a very stable molecule and difficult to activate. Despite such challenges, a number of methods for CO 2 capture and conversion have been investigated including absorption, photocatalysis, electrochemical and thermochemical methods. Conventional technologies employed in these processes often suffer from low selectivity and conversion, and lack energy efficiency. Therefore, suitable process intensification techniques based on equipment, material and process development strategies can play a key role at enabling the deployment of these processes. In this review paper, the cutting-edge intensification technologies being applied in CO 2 capture and conversion are reported and discussed, with the main focus on the chemical conversion methods.

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Section: Absorbent Selectionmentioning

confidence: 99%

Process intensification technologies for CO2 capture and conversion – a review

2020

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“…Absorption in packed columns using amine is the current conventional technology for CO 2 separation, but membrane technology has emerged as an attractive alternative. Membrane gas absorption (MGA) merges membrane separation and absorption/desorption process by using a membrane as a barrier between the gas and liquid phases so that phase dispersion does not occur and gas–liquid interaction can be promoted . By utilizing MGA process, operational issues such as foaming and flooding can be avoided, and it has the potential of having lower capital and operating costs .…”

Section: Introductionmentioning

confidence: 99%

“…Membrane gas absorption (MGA) merges membrane separation and absorption/desorption process by using a membrane as a barrier between the gas and liquid phases so that phase dispersion does not occur and gas-liquid interaction can be promoted. 1 By utilizing MGA process, operational issues such as foaming and flooding can be avoided, and it has the potential of having lower capital and operating costs. 2 For example, Kaerner Oil & Gas Ltd. and WL Gore & Associates GmbH have initiated a joint project to develop MGA process to remove acid gases 3 with a pilot plant built in Kårstø, on the west coast of Norway.…”

Section: Introductionmentioning

confidence: 99%

Functionalization of silica nanoparticles to reduce membrane swelling in CO₂ absorption process

Rosli

Ahmad

Low

2019

J of Chemical Tech & Biotech

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BACKGROUND Membrane gas absorption (MGA) is an attractive alternative to conventional absorption for carbon dioxide (CO2) removal, but the performance can be severely retarded due to membrane wetting issues. In order to overcome this, silica nanoparticles functionalized with low‐density polyethylene (LDPE) were added into polyvinylidene fluoride (PVDF) membrane matrix to increase the membrane hydrophobicity and avoid changes in membrane morphology caused by membrane swelling. RESULTS The incorporation of LDPE‐functionalized silica inside the membrane enhanced the contact angle and LEPw values from 73.2° to 109.1° and 5.98 bar to 9.25 bar, respectively. These increments indicate an improvement in hydrophobicity for the LDPE‐silica/PVDF composite membrane, thus, enhanced membrane anti‐wetting ability. Furthermore, Fourier transform infrared (FTIR) analysis, field emission scanning electron microscope (FESEM) and swelling tests indicated that prolonged exposure to amine absorbent caused the serious degradation and swelling of the neat PVDF membrane with surface coated LDPE. By contrast, the wetting effects were insignificant for the LDPE‐silica/PVDF composite membrane, which led to a stable MGA performance using 2‐amino‐2‐methyl‐1‐propanol as the reactive absorbent. CONCLUSION The ability of the composite membrane to resist wetting, swelling and chemical degradation is attributed to the restriction PVDF chain movement by its intermolecular interactions with LDPE‐functionalized silica. These improvements led to the fabrication of a hydrophobic, chemically stable composite membrane that was able to show a consistent CO2 absorption flux of 8.7 × 10−4 mol m−2 s–1 over 120 h of MGA operation. © 2019 Society of Chemical Industry

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“…Even though various conventional processes have been utilised for the purpose of gas separation [1][2][3][4], membrane processes have emerged and remained as an attractive alternative [5][6][7][8][9][10][11]. In fact, membranes have managed to make its way into the industry in larger-scale applications [12][13][14][15][16], proving its capability to match the performances of the conventional processes while overcoming their myriad disadvantages.…”

Section: Introductionmentioning

confidence: 99%

Molecularly engineered switchable photo-responsive membrane in gas separation for environmental protection

Rosli

Low

2019

Environmental Engineering Research

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In recent years, stimuli-responsive materials have garnered interest due to their ability to change properties when exposed to external stimuli, making it useful for various applications including gas separation. Light is a very attractive trigger for responsive materials due to its speedy and non-invasive nature as well as the potential to reduce energy costs significantly. Even though light is deemed as an appealing stimulus for the development of stimuli-responsive materials, this avenue has yet to be extensively researched, as evidenced by the fewer works done on the photo-responsive membranes. Of these, there are even less research done on photo-responsive materials for the purpose of gas separation, thus, we have collected the examples that answer both these criteria in this review. This review covers the utilisation of photo-responsive materials specifically for gas separation purposes. Photo-chromic units, their integration into gas separation systems, mechanism and research that have been done on the topic so far are discussed.

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Advances in Liquid Absorbents for CO2 Capture: A Review

Cited by 27 publications

References 53 publications

Process intensification technologies for CO2 capture and conversion – a review

Process intensification technologies for CO2 capture and conversion – a review

Functionalization of silica nanoparticles to reduce membrane swelling in CO₂ absorption process

Molecularly engineered switchable photo-responsive membrane in gas separation for environmental protection

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Advances in Liquid Absorbents for CO2 Capture: A Review

Cited by 27 publications

References 53 publications

Process intensification technologies for CO2 capture and conversion – a review

Process intensification technologies for CO2 capture and conversion – a review

Functionalization of silica nanoparticles to reduce membrane swelling in CO2 absorption process

Molecularly engineered switchable photo-responsive membrane in gas separation for environmental protection

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Product

Resources

About

Functionalization of silica nanoparticles to reduce membrane swelling in CO₂ absorption process