An overview on trace CO2 removal by advanced physisorbent materials

Khraisheh, Majeda; Mukherjee, Soumya; Kumar, Amrit; Momani, Fares Al; Walker, Gavin; Zaworotko, Michael J.

doi:10.1016/j.jenvman.2019.109874

Cited by 61 publications

(29 citation statements)

References 99 publications

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“…The TGA patterns were in agreement with reported TGAs [43,67,68]. The initial evaporation of water and other volatiles is the most likely reason for the observed initial loss of mass, however, the larger drop in weight of the sample at higher temperature can be attributed to the decomposition of the material and the loss of wall and structural integrity [44,69,70]. Figure S5 shows the N2 adsorption-desorption isotherm.…”

Section: Resultssupporting

confidence: 87%

“…Compared to traditional activated carbon or zeolites, MOFs attracted a vast research focus for many gas separations due to their superior flexibility, tenability and functionality [20,24,25,33,[35][36][37][38][39][40][41][42]. Metal-organic frameworks used for olefin separation can be mainly divided into two categories: open metal site MOFs that results in propylene higher equilibrium selectivity and MOFs with size sieving optimal pore aperture (elevated kinetic selectivity to C 3 H 6 [43,44]. The ability to control their synthesis, functional surface groups, pore size offers the MOFs a great advantage in targeting specific difficult gas separations.…”

Section: Of 19mentioning

confidence: 99%

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High Purity/Recovery Separation of Propylene from Propyne Using Anion Pillared Metal-Organic Framework: Application of Vacuum Swing Adsorption (VSA)

2021

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Propylene is one of the world’s most important basic olefin raw material used in the production of a vast array of polymers and other chemicals. The need for high purity grade of propylene is essential and traditionally achieved by the very energy-intensive cryogenic separation. In this study, a pillared inorganic anion SIF62− was used as a highly selective C3H4 due to the square grid pyrazine-based structure. Single gas adsorption revealed a very high C3H4 uptake value (3.32, 3.12, 2.97 and 2.43 mmol·g−1 at 300, 320, 340 and 360 K, respectively). The values for propylene for the same temperatures were 2.73, 2.64, 2.31 and 1.84 mmol·g−1, respectively. Experimental results were obtained for the two gases fitted using Langmuir and Toth models. The former had a varied degree of representation of the system with a better presentation of the adsorption of the propylene compared to the propyne system. The Toth model regression offered a better fit of the experimental data over the entire range of pressures. The representation and fitting of the models are important to estimate the energy in the form of the isosteric heats of adsorption (Qst), which were found to be 45 and 30 kJ·Kmol−1 for propyne and propylene, respectively. A Higher Qst value reveals strong interactions between the solid and the gas. The dynamic breakthrough for binary mixtures of C3H4/C3H6 (30:70 v/v)) were established. Heavier propylene molecules were eluted first from the column compared to the lighter propyne. Vacuum swing adsorption was best suited for the application of strongly bound materials in adsorbents. A six-step cycle was used for the recovery of high purity C3H4 and C3H6. The VSA system was tested with respect to changing blowdown time and purge time as well as energy requirements. It was found that the increase in purge time had an appositive effect on C3H6 recovery but reduced productivity and recovery. Accordingly, under the experimental conditions used in this study for VSA, the purge time of 600 s was considered a suitable trade-off time for purging. Recovery up to 99%, purity of 98.5% were achieved at a purge time of 600 s. Maximum achieved purity and recovery were 97.4% and 98.5% at 100 s blowdown time. Energy and power consumption varied between 63–70 kWh/ton at the range of purge and blowdown time used. The VSA offers a trade-off and cost-effective technology for the recovery and separation of olefins and paraffin at low pressure and high purity.

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Section: Resultssupporting

confidence: 87%

Section: Of 19mentioning

confidence: 99%

High Purity/Recovery Separation of Propylene from Propyne Using Anion Pillared Metal-Organic Framework: Application of Vacuum Swing Adsorption (VSA)

2021

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“…Then CO 2 diffuses into the gas-liquid interface and is subsequently transferred across the liquid film out into the bulk of liquid. Hence, the CO 2 mass transfer flux (N CO 2 ) can be calculated via Equations (1) and (2).…”

Section: Mass Transfer Coefficient Calculationmentioning

confidence: 99%

“…For instance, high CO 2 content in biogas degrades the fuel quality such as the calorific value and anti-knock properties of engine [1]. Over the past decades, many CO 2 separation methods have been proposed such as absorption, adsorption, and membrane separation [2]. Among these methods, CO 2 absorption is the most widely used due to the relatively lower operating cost and higher efficiency [3].…”

Section: Introductionmentioning

confidence: 99%

Mass Transfer Correlation and Optimization of Carbon Dioxide Capture in a Microchannel Contactor: A Case of CO2-Rich Gas

et al. 2020

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This work focused on the application of a microchannel contactor for CO2 capture using water as absorbent, especially for the application of CO2-rich gas. The influence of operating conditions (temperature, volumetric flow rate of gas and liquid, and CO2 concentration) on the absorption efficiency and the overall liquid-side volumetric mass transfer coefficient was presented in terms of the main effects and interactions based on the factorial design of experiments. It was found that 70.9% of CO2 capture was achieved under the operating conditions as follows; temperature of 50 °C, CO2 inlet fraction of 53.7%, total gas volumetric flow rate of 150 mL min−1, and adsorbent volumetric flow rate of 1 mL min−1. Outstanding performance of CO2 capture was demonstrated with the overall liquid-side volumetric mass transfer coefficient of 0.26 s−1. Further enhancing the system by using 2.2 M of monoethanolamine in water (1:1 molar ratio of MEA-to-CO2) boosted the absorption efficiency up to 88%.

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“…In terms of maximising low temperature adsorption, porous solid sorbents, such as zeolites, activated carbons, and metalorganic frameworks (MOFs), have certain advantages. 29 Unlike chemisorbents, they form weaker non-covalent interactions with the adsorbate, and have lower isosteric heats of adsorption (Q st ) from 25 to around 50 kJ/mol, while the Q st for chemisorption can be over 90 kJ/mol. 2,30 Adsorption is exothermic, therefore inversely proportional to temperature, however, where low adsorption temperatures may hinder CO 2 uptake for amine-based chemisorbents due to poor diffusion, high surface area physisorbents may excel.…”

Section: Introductionmentioning

confidence: 99%

Overcoming mass transfer limitations in cross-linked polyethyleneimine-based adsorbents to enable selective CO₂ capture at ambient temperature

et al. 2022

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An overview on trace CO2 removal by advanced physisorbent materials

Cited by 61 publications

References 99 publications

High Purity/Recovery Separation of Propylene from Propyne Using Anion Pillared Metal-Organic Framework: Application of Vacuum Swing Adsorption (VSA)

High Purity/Recovery Separation of Propylene from Propyne Using Anion Pillared Metal-Organic Framework: Application of Vacuum Swing Adsorption (VSA)

Mass Transfer Correlation and Optimization of Carbon Dioxide Capture in a Microchannel Contactor: A Case of CO2-Rich Gas

Overcoming mass transfer limitations in cross-linked polyethyleneimine-based adsorbents to enable selective CO₂ capture at ambient temperature

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An overview on trace CO2 removal by advanced physisorbent materials

Cited by 61 publications

References 99 publications

High Purity/Recovery Separation of Propylene from Propyne Using Anion Pillared Metal-Organic Framework: Application of Vacuum Swing Adsorption (VSA)

High Purity/Recovery Separation of Propylene from Propyne Using Anion Pillared Metal-Organic Framework: Application of Vacuum Swing Adsorption (VSA)

Mass Transfer Correlation and Optimization of Carbon Dioxide Capture in a Microchannel Contactor: A Case of CO2-Rich Gas

Overcoming mass transfer limitations in cross-linked polyethyleneimine-based adsorbents to enable selective CO2 capture at ambient temperature

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Product

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Overcoming mass transfer limitations in cross-linked polyethyleneimine-based adsorbents to enable selective CO₂ capture at ambient temperature