Post-combustion CO2 capture with membrane process: Practical membrane performance and appropriate pressure

Xu, Jiayou; Wang, Zhi; Qiao, Zhihua; Wu, Hongyu; Dong, Songlin; Zhao, Song; Wang, Jixiao

doi:10.1016/j.memsci.2019.03.052

Cited by 106 publications

(37 citation statements)

References 72 publications

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“…Recent years had seen great advances in membrane technology (Mubashir et al 2018). A membrane unit specifically developed by MTR for this application (called Polaris™), with puregas CO2 permeance values =1000 ~ 2000 GPU (50 psig, 23°C) and CO2/N2 selectivity=50 ~ 60 (White et al, 2015;Xu et al, 2019). In this paper, plate and frame modules of membrane unit with 1500 GPU and 30 CO2/N2 selectivity was applied.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

CO2 Capture by Using a Membrane-absorption Hybrid Process in the Nature Gas Combined Cycle Power Plants

Dong

Wang

Liu

et al. 2021

Aerosol Air Qual. Res.

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The main research objective of this paper was to optimize the design parameters of the hybrid membrane-absorption CO2 capture process in Natural Gas-steam Cycle (NGCC) power plants. To predict the CO2 concentration in permeate gas and required membrane area, a mass transfer calculation model of CO2/N2/H2O separation membrane was established in Aspen plus. Effect of CO2 recovery rate of membrane unit, operating pressure proportion of feed gas pressure over permeate gas pressure and flue gas flow ratio on membrane area, compressor power and solution regeneration duty were studied based on membrane calculation model. The optimal parameter of feed/permeate side pressure ratio and flow ratio are 10:1 and 50% respectively. The solution regeneration duty of hybrid process reduced at over 20.7% than traditional chemical absorption process.

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Section: Accepted Manuscriptmentioning

confidence: 99%

CO2 Capture by Using a Membrane-absorption Hybrid Process in the Nature Gas Combined Cycle Power Plants

Dong

Wang

Liu

et al. 2021

Aerosol Air Qual. Res.

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“…The MKP‐PVAm/mPSf membrane also shows good potential for CO 2 capture from flue gas because of its high permeance and selectivity. In order to explore the economic advantages of MKP‐PVAm/mPSf membrane for CO 2 capture, a typical two‐stage membrane process was simulated based on the assumptions in our previous work, [ 16 ] and which is also given in the Supporting Information.…”

Section: Figurementioning

confidence: 99%

“…Figure S21c (Supporting Information) shows that the optimum feed gas pressure of 0.5 MPa provides the minimum energy consumption, which was explained in our previous study. [ 16 ] With a combined increase in feed gas pressure and a decrease in membrane area requirements, the increase in energy consumption generated the minimum CO 2 capture cost. Figure S21d (Supporting Information) shows that a minimum CO 2 capture cost of $26.2 per tonne CO 2 could be achieved when the feed pressure is about 0.75 MPa.…”

Section: Figurementioning

confidence: 99%

Unobstructed Ultrathin Gas Transport Channels in Composite Membranes by Interfacial Self‐Assembly

Wang

Qiao

et al. 2020

Advanced Materials

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effective approach to greatly improve gas separation performance of MMMs.Recently, rigid microporous polymer membranes with high FFV and good interface compatibility, acting as highspeed gas transport channels, have been under intense research interest for gas separation, [3] but it is difficult to realize large-area fabrication and large-scale applications with some of these complex polymer structures. Similarly, very few MMMs have been fabricated having gas transport channels through the gas selective skin layer of the membrane. Wang and co-workers [4] fabricated high-speed vertically aligned montmorillonite gas transport channels as the selective skin layer of MMMs for CO 2 separations. However, the structural adjustability of the gas-selective porous materials is limited, and multistep MMM fabrication procedures are somewhat complicated.Many porous materials are investigated as dispersed phases, such as zeolites, metal-organic frameworks (MOFs), [5] and covalent organic frameworks (COFs). [6] Among these, MOFs have several advantages such as uniform and highly porous structures, large surface areas, tunable pore channels and controllable properties. Using MOFs as fillers, the interfacial compatibility and morphology between filler particles and polymer matrix can be controlled more easily due to the presence of organic ligands with a broad variety of functionalities on the MOF structures. This superior affinity and compatibility of MOFs with polymer chains make them outstanding fillers to increase gas separation performance of MMMs.To the best of our knowledge, using MOFs as unobstructed and direct gas transport channels through MMMs has rarely Ultrathin unobstructed gas transport channels through the membrane selective layer are constructed in mixed matrix membranes (MMMs) by using gravity-induced interface self-assembly of poly(vinylamine) and polymermodified MIL-101(Cr). For CO 2 /N 2 (15/85 by volume) mixed gas, the MMMs achieve a high CO 2 permeance of 823 gas permeation units and CO 2 /N 2 selectivity of 242 at 0.5 MPa. Based on economic analyses, a two-stage membrane process can achieve gas separation and economic targets.Membrane technology has many advantages, such as operational simplicity, lower energy requirements and environmental friendliness, which have enabled significant commercial advances in the field of gas separation. [1] Mixed matrix membranes (MMMs) are of interest in gas separation applications because they combine the advantages of polymeric dense membranes, such as inexpensive large-scale fabrication, with filler materials of defined pore sizes, allowing high gas permeance and permselectivity to be achieved simultaneously. In many MMMs, porous filler materials are deployed as the dispersed phase within a continuous polymer phase. [2] Currently, most porous materials used in MMMs are encapsulated by polymer matrix, and the filler acts to disrupt regular polymer chain packing, leading to an increase in fractional free volume (FFV) and a decrease in crystallinity. Thus, gas separatio...

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“…where, x H 2 O (%) is gas water vapor content, P sat (bar) is water vapor saturated pressure, P (bar) is the gas pressure. P sat depends on the gas temperature (T,°C), 19 Buck equation 51 is adopted here to calculated P sat as it has…”

Section: The System Operates At Isothermal Condition;mentioning

confidence: 99%

“…Amooghin et al 18 developed a two-dimensional model for AFTMs that could account for the effect of partial pressure on gas permeation, modeling results were in a good agreement with experimental data. Xu et al 19 developed a mathematical model for AFTMs to study the impact of feed gas CO 2 concentration, feed pressure, and selectivity on the separation performance. Generally, the previous modeling studies on AFTMs focused on analyzing the performance of membrane materials, thus mainly modeling the effect of operating pressure and membrane properties, while ignoring the effect of other gas compositions such as water vapor.…”

mentioning

confidence: 99%

Water vapor effects on CO₂ separation of amine‐containing facilitated transport membranes (AFTMs) module: mathematical modeling using tanks‐in‐series approach

et al. 2020

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Amine-containing facilitated transport membranes (AFTMs) are emerging membranes and have great potential for CO 2 capture. AFTMs are particularly suitable for humid flue gases, as water vapor enhances the facilitated transportation of CO 2. However, there is a lack of mathematical models available to evaluate the impact of water vapor on CO 2 separation performance for large-scale membrane modules. Therefore, developing a mathematical model considering the water vapor effects is of great importance to guide the large-scale applications of AFTMs for CO 2 capture. In this study, a mathematical model using tanks-in-series approach for CO 2 capture through AFTMs is proposed. In this model, the tanks-in-series approach can reflect the variable (water vapor-dependent) gas permeance along the membrane module. Modeling results showed the necessity of considering the effect of water vapor content decline along the module. In addition, both increasing temperature and pressure primarily lead to a faster decline of relative humidity (RH) along the membrane module, resulting in an increase of CO 2 recovery but a decrease of CO 2 product purity. For a gas stream with relatively low water vapor content (<2% in this study), different H 2 O permeance has a minor effect on separation performance. Moreover, permeate gas with higher water vapor content as well as higher RH is considered more suitable for further treatment of second stage membrane separation. In conclusion,

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Post-combustion CO2 capture with membrane process: Practical membrane performance and appropriate pressure

Cited by 106 publications

References 72 publications

CO2 Capture by Using a Membrane-absorption Hybrid Process in the Nature Gas Combined Cycle Power Plants

CO2 Capture by Using a Membrane-absorption Hybrid Process in the Nature Gas Combined Cycle Power Plants

Unobstructed Ultrathin Gas Transport Channels in Composite Membranes by Interfacial Self‐Assembly

Water vapor effects on CO₂ separation of amine‐containing facilitated transport membranes (AFTMs) module: mathematical modeling using tanks‐in‐series approach

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Post-combustion CO2 capture with membrane process: Practical membrane performance and appropriate pressure

Cited by 106 publications

References 72 publications

CO2 Capture by Using a Membrane-absorption Hybrid Process in the Nature Gas Combined Cycle Power Plants

CO2 Capture by Using a Membrane-absorption Hybrid Process in the Nature Gas Combined Cycle Power Plants

Unobstructed Ultrathin Gas Transport Channels in Composite Membranes by Interfacial Self‐Assembly

Water vapor effects on CO2 separation of amine‐containing facilitated transport membranes (AFTMs) module: mathematical modeling using tanks‐in‐series approach

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Water vapor effects on CO₂ separation of amine‐containing facilitated transport membranes (AFTMs) module: mathematical modeling using tanks‐in‐series approach