Sorbents screening for post-combustion CO2 capture via combined temperature and pressure swing adsorption

Dhoke, Chaitanya; Cloete, Schalk; Krishnamurthy, Shreenath; Seo, Hwimin; Luz, Ignacio; Soukri, Mustapha; Park, Yong-ki; Blom, Richard; Amini, Shahriar; Zaabout, Abdelghafour

doi:10.1016/j.cej.2019.122201

Cited by 60 publications

(38 citation statements)

References 34 publications

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“…(Su et al, 2009). This behavior of a lower capacity at a lower temperature is widely observed for sorbents containing such nitrogen groups (Thakkar et al, 2017a;Dhoke et al, 2020). The adsorption isotherms were fitted to a dual site Langmuir model of the form given by equation…”

Section: Volumetric Experimentsmentioning

confidence: 88%

3D Printed PEI Containing Adsorbents Supported by Carbon Nanostructures for Post-combustion Carbon Capture From Biomass Fired Power Plants

et al. 2021

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Processes that utilize solid adsorbents to capture CO2 are promising alternatives to state-of-art Amine based technologies for capturing CO2 from large point sources. Although the energy needs of solid sorbent-based processes are low, the process footprint and consequently the capital cost connected to its implementation can be large due to the relatively long cycle times needed to get the required purity and recovery of the CO2 product. To overcome this challenge, processes having structured adsorbents like laminates, monoliths etc. are needed due to their low pressure drop and better mass transfer characteristics. The aim of this multiscale study is to evaluate the process-based performance of a 3D printed sorbent containing polyethyleneimine (PEI) and multiwalled carbon nanotubes (MWCNT) for capturing CO2 from a biomass fired power plant flue gas. A 6-step vacuum swing adsorption (VSA) cycle was simulated and optimized using equilibrium and kinetics data obtained from volumetry and breakthrough experiments. The optimization study showed that it was possible to achieve purity values >95% and recovery values >90% from dry CO2 feed streams containing 10 and 15% CO2 respectively. The minimum specific energy values were 0.94 and 0.6 MJ/kg and maximum productivity values were 0.8 and 2.2 mol/m3 ads s, respectively, for the two scenarios.

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Section: Volumetric Experimentsmentioning

confidence: 88%

3D Printed PEI Containing Adsorbents Supported by Carbon Nanostructures for Post-combustion Carbon Capture From Biomass Fired Power Plants

et al. 2021

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“…Therefore, choosing a suitable adsorption model to describe the adsorption isotherms could improve the accuracy of theoretical calculations 42 . In this study, two similar models, the Langmuir–Freundlich model and Toth model were selected to fit the experimental results 16,43 :

q = \frac{q_{m} b p^{c}}{1 + b p^{c}}

q = \frac{q_{m} b p}{{false[1 + {false(b p false)}^{c} false]}^{1 / c}}

where q is gas adsorption capacity (mmol g −1 ), q m is maximum adsorption capacity of the adsorbent (mmol g −1 ), p is equilibrium pressure (MPa), b is adsorption equilibrium constant (MPa –1 ), c is the heterogeneity factor an indicator of adsorption capacity.…”

Section: Methodsmentioning

confidence: 99%

Evaluation of separation effect for CH₄ enrichment from coalbed methane (CBM) under the synergistic action of temperature and pressure based on IAST theory

Zheng

Zhang

et al. 2021

Greenhouse Gases

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The synergistic pressure and temperature swing adsorption (SPTSA) technology is designed for purifying coalbed methane (CBM) are proposed in this work. Cyclic processes including four steps: cooling, pressurization, heating, and depressurization. Ideal adsorption solution theory (IAST) was used to evaluate the separation effect. Super activated carbons (SACs) with specific surface area exceeds 3000 m2 g−1 were prepared and used as adsorbents. From 273 to 373 K, the adsorption selectivity (S) changes more than 4, while the S changes less than 2 with the pressure changes from 0.1 to 9 MPa, indicating that temperature change is more conducive to improve the CH4 purity compared to the pressure change. However, more CH4 purification capacity can be obtained by pressure change. In cyclic SPTSA process, the CH4 purification capacity is generally increased by more than 30% compared with the pressure swing adsorption technology, which indicated that CH4 separation and purification under the synergistic action of temperature and pressure is theoretically feasible and has a broad prospect in the CBM purification. © 2021 Society of Chemical Industry and John Wiley & Sons, Ltd.

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“…In 2018, Yang et al [12] reported on the use of pillared hybrid ultra-microporous (HUM) SiF −2 6 and NboF 5 2 as a single molecular trap of C 3 H 4 at an ultralow concentration of C 3 H 4 in C 3 H 6 mixture and recorded a new benchmark for the uptake of C 3 H 4 under with a value of 2.0 mmol•g −1 . A suitable separation system is essential for utilization of any sorbent new materials for a specific separation as it will affect the cost, footprint and process efficiency [32][33][34]. 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].…”

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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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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Sorbents screening for post-combustion CO2 capture via combined temperature and pressure swing adsorption

Cited by 60 publications

References 34 publications

3D Printed PEI Containing Adsorbents Supported by Carbon Nanostructures for Post-combustion Carbon Capture From Biomass Fired Power Plants

3D Printed PEI Containing Adsorbents Supported by Carbon Nanostructures for Post-combustion Carbon Capture From Biomass Fired Power Plants

Evaluation of separation effect for CH₄ enrichment from coalbed methane (CBM) under the synergistic action of temperature and pressure based on IAST theory

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

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Sorbents screening for post-combustion CO2 capture via combined temperature and pressure swing adsorption

Cited by 60 publications

References 34 publications

3D Printed PEI Containing Adsorbents Supported by Carbon Nanostructures for Post-combustion Carbon Capture From Biomass Fired Power Plants

3D Printed PEI Containing Adsorbents Supported by Carbon Nanostructures for Post-combustion Carbon Capture From Biomass Fired Power Plants

Evaluation of separation effect for CH4 enrichment from coalbed methane (CBM) under the synergistic action of temperature and pressure based on IAST theory

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

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Evaluation of separation effect for CH₄ enrichment from coalbed methane (CBM) under the synergistic action of temperature and pressure based on IAST theory