Advanced Membranes and Learning Scale Required for Cost-Effective Post-combustion Carbon Capture

Zhai, Haibo

doi:10.1016/j.isci.2019.03.006

Cited by 35 publications

(23 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At a total pressure of 772 mm Hg, the selectivity was found to be 53, which is considered above the threshold of a costefficient capture/separation process. 59 This selectivity is within the range of reported values for similar materials (25− 250). 50−52 However, a direct comparison of the selectivity with reported values is not viable, as different calculation methods were used and different partial pressure ratios of the components were assumed.…”

Section: Resultssupporting

confidence: 87%

Graphene-Based Monolithic Nanostructures for CO₂ Capture

Politakos

Barbarin

Cantador

et al. 2020

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Monolithic nanocarbon-based CO2 solid sorbents offer fast mass transport, easy handling, minor pressure drop, and cycle operation stability because of the interconnected three-dimensional network of pores that provides a unique porous structure. In this work, following a one-step water-based method, graphene-based monoliths were produced by a spontaneous reduction-induced self-assembly of graphene oxide nanoplatelets under mild conditions (45–90 °C). By varying the reaction temperature and amount of reducing agent (ascorbic acid, AsA), the engineering of the porous structure of the monoliths was performed and resulted in a portfolio of different monoliths with different capacities for CO2 adsorption. It was found that the monolith produced at the highest temperature and with the lowest AsA amount possessed the highest specific surface area and porosity as well as a high level of functionalization. As a result, this monolith presented an excellent CO2 capture performance of 2.1 mmol/g at T = 25 °C and P = 1 atm. This value is between the highest achieved in CO2 sorption in comparison to that of similar and nontreated materials. The selectivity of this monolith for CO2 capture over that for N2 at 25 °C and atmospheric pressure is 53, presenting a high viability for practical applications. The monolith was shown to lose capacity in cycle operations, probably because of the collapse of the smallest pores, which was solved by the addition of a small amount of polymer particles during the one-step synthesis of the monolithic structures. This modification provides for an excellent stability over five adsorption/desorption cycles.

show abstract

Section: Resultssupporting

confidence: 87%

Graphene-Based Monolithic Nanostructures for CO₂ Capture

Politakos

Barbarin

Cantador

et al. 2020

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

“…While state-of-the-art TFC membranes have performed well under mild, controlled conditions in laboratories, little focus has been given to their stability and efficiency within real process streams. The plasticization and competitive sorption effects caused by the dissolution of these additional gases in the membrane will drastically degrade the membrane permeation properties and separation efficiency. , Therefore, in order to produce industrially feasible TFC materials, future exploration of TFC membranes should examine their operation under practical conditions in terms of feed pressure, temperature, and composition. , By addressing these challenges directly in future studies, TFC membrane technology has the potential to revolutionize postcombustion CO 2 capture.…”

Section: Postcombustion Carbon Capture Challenges and Membrane Perfor...mentioning

confidence: 99%

Postcombustion Carbon Capture Using Thin-Film Composite Membranes

et al. 2019

View full text Add to dashboard Cite

Conspectus Climate change due to anthropogenic carbon dioxide emissions (e.g., combustion of fossil fuels) represents one of the most profound environmental disasters of this century. Equipping power plants with carbon capture and storage (CCS) technology has the potential to reduce current worldwide CO2 emissions. However, existing CCS schemes (i.e., amine scrubbing) are highly energy-intensive. The urgent abatement of CO2 emissions relies on the development of new, efficient technologies to capture CO2 from existing power plants. Membrane-based CO2 separation is an attractive technology that meets many of the requirements for energy-efficient industrial carbon capture. Within this domain, thin-film composite (TFC) membranes are particularly attractive, providing high gas permeance in comparison with conventional thicker (∼50 μm) dense membranes. TFC membranes are usually composed of three layers: (1) a bottom porous support layer; (2) a highly permeable intermediate gutter layer; and (3) a thin (<1 μm) species-selective top layer. A key challenge in the development of TFC membranes has been to simultaneously maximize the transmembrane gas permeance of the assembled membrane (by minimizing the gas resistance of each layer) while maintaining high gas-specific selectivity. In this Account, we provide an overview of our recent development of high-performance TFC membrane materials as well as insights into the unique fabrication strategies employed for the selective layer and gutter layer. Optimization of each layer of the membrane assembly individually results in significant improvements in overall membrane performance. First, incorporating nanosized fillers into the selective layer (poly(ethylene glycol)-based polymers) and reducing its thickness (to ca. 50 nm) through continuous assembly of polymers technology yields major improvements in CO2 permeance without loss of selectivity. Second, we focus on optimization of the middle gutter layer of TFC membranes. The development of enhanced gutter layers employing two- and three-dimensional metal–organic framework materials leads to considerable improvements in both CO2 permeance and selectivity compared with traditional poly(dimethylsiloxane) materials. Third, incorporation of a porous, flexible support layer culminates in a mechanically robust high-performance TFC membrane design that exhibits unprecedented CO2 separation performance and holds significant potential for industrial CO2 capture. Alternative strategies are also emerging, whereby the selective layer and gutter layer may be combined for enhanced membrane efficiency. This Account highlights the CO2 capture performance, current challenges, and future research directions in designing high-performance TFC membranes.

show abstract

“…There are only several commercial membrane modules generally used for flue gas separation that have been tested under real conditions with flue gas at pilot scale with different results [6][7][8][9][10]. The most successful seem to be the Polaris™ membrane produced by MTR [10], which, with its CO2 permeance of 2000 GPU and CO2/N2 selectivity of 50, defined the new optimum of membrane transport properties for CO2 removal from flue gas, and is used as an example in optimization studies [11][12][13][14][15][16]. These studies indicate that a really large membrane area will be required if we want to avoid additional compression of the flue gas.…”

Section: Introductionmentioning

confidence: 99%

Flue gas purification with membranes based on the polymer of intrinsic microporosity PIM-TMN-Trip

Stanovský

Žitková

Kárászová

et al. 2020

Separation and Purification Technology

View full text Add to dashboard Cite

Flue gas purification experiments were performed with a membrane made from the ultrapermeable polymer of intrinsic microporosity (PIM) based on tetramethyltetrahydronaphthalene unit coupled with bicyclic triptycene (PIM-TMN-Trip). Permeation experiments with a CO2-N2-O2-SO2 mixture, simulating flue gas from power plants, were performed by means of an in-house developed permeation unit. The results showed very high permeability of the membrane for sulfur dioxide SO2 and high permeability of CO2, lying mainly between the Robeson upper bound form 2008 and the recently reported upper bound from 2019. Moderately high mixed gas selectivity of SO2 and CO2 with respect to N2 (21-29 and 11-18, respectively), in combination with very high permeability (28•10 3 and 30•10 3 Barrer, respetively), suggest potential use for industrial gas separation processes. The SO2/CO2 mixed gas selectivity was relatively low (around 1.8), but comparable with other novel membranes, and both are removed simultaneously in the process of CO2 separation.

show abstract

Advanced Membranes and Learning Scale Required for Cost-Effective Post-combustion Carbon Capture

Cited by 35 publications

References 49 publications

Graphene-Based Monolithic Nanostructures for CO₂ Capture

Graphene-Based Monolithic Nanostructures for CO₂ Capture

Postcombustion Carbon Capture Using Thin-Film Composite Membranes

Flue gas purification with membranes based on the polymer of intrinsic microporosity PIM-TMN-Trip

Contact Info

Product

Resources

About

Advanced Membranes and Learning Scale Required for Cost-Effective Post-combustion Carbon Capture

Cited by 35 publications

References 49 publications

Graphene-Based Monolithic Nanostructures for CO2 Capture

Graphene-Based Monolithic Nanostructures for CO2 Capture

Postcombustion Carbon Capture Using Thin-Film Composite Membranes

Flue gas purification with membranes based on the polymer of intrinsic microporosity PIM-TMN-Trip

Contact Info

Product

Resources

About

Graphene-Based Monolithic Nanostructures for CO₂ Capture

Graphene-Based Monolithic Nanostructures for CO₂ Capture