Exploring the limits of adsorption-based CO2 capture using MOFs with PVSA – from molecular design to process economics

Danaci, David; Bui, Mai; Dowell, Niall Mac; Petit, Camille

doi:10.1039/c9me00102f

Cited by 110 publications

(135 citation statements)

References 82 publications

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“…Danaci et al have developed an adsorbent screening tool to evaluate adsorbents for CO 2 capture by considering process economics and other industrially relevant factors. [96] Specifically, 25 adsorbents (1 activated carbon, 2 zeolites, 22 MOFs) were evaluated with regard to performance limitations -i. e. CO 2 purity and recovery as well as costs. It was concluded that low nitrogen adsorption and adequate adsorption enthalpies are key to achieving good process performance and reducing costs.…”

Section: Resultsmentioning

confidence: 99%

“…Considering both CO 2 adsorption energetics and uptakes, the NbOFFIVE-1-Ni (which has not been assessed in ref. 96) shows the best uptake capacity for carbon dioxide at 400 ppm together with optimal regeneration energy ( Figure 6). [48] NbOF-FIVE-1-Ni is an ideal material for carbon capture at very low CO 2 concentrations due to its peculiar structure with contracted square-channels that are functionalized with proximal fluorine moieties.…”

Section: Resultsmentioning

confidence: 99%

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Strategies to Enhance Carbon Dioxide Capture in Metal‐Organic Frameworks

Piscopo

Loebbecke

2020

ChemPlusChem

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The dramatic increase of atmospheric CO2 concentration is responsible for a fast and potentially unpredictable global climate change. Therefore, the implementation of negative carbon technologies such as direct air capture (DAC) is needed. Metal–organic frameworks (MOFs) have the potential to perform CO2 DAC and achieve unprecedented performances. Herein strategies to improve the CO2 capture efficiency of MOFs and their potential implementation in real applications are discussed. Three main categories of targeted modifications to the frameworks are usually performed to enhance the CO2 uptake capacity and adsorption selectivity: 1) modifications to the metal unit; 2) modifications to the linker unit; 3) confinement of solvents within MOFs. The synthesis of MOF composites using other porous materials as support is also a useful method to improve the CO2 capture performances. Another approach involves the synthesis of amine‐functionalized MOFs that can chemically bind carbon dioxide.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Strategies to Enhance Carbon Dioxide Capture in Metal‐Organic Frameworks

Piscopo

Loebbecke

2020

ChemPlusChem

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“…Using a reported procedure, (64) we estimated the costs of capturing CO2 from a CO2/N2 feed at 1.05 bar and 313 K with CO2 concentrations of 4.38 % (relevant to a natural gas combined cycle flue gas), 12.5 % (relevant to coal flue gas), 21 % (relevant to a cement plant) and 25.5 % (relevant to an integrated steel mill).…”

Section: Calculation Of Co2 Capture Costsmentioning

confidence: 99%

“…Summary of purity, recovery and cost calculations for MUF-16 compared to two previously reported high-performance porous materials (64). …”

mentioning

confidence: 99%

A Universal Porous Adsorbent for the Selective Capture of Carbon Dioxide

Qazvini¹,

Telfer²

2020

Preprint

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Efficient and sustainable methods for carbon dioxide (CO2) capture are essential. Its atmospheric concentration must be reduced to meet climate change targets, and its removal from sources such as chemical feedstocks is vital. While mature technologies involving chemical reactions that absorb CO2 exist, they have many drawbacks. Porous materials with void spaces that are complementary in size and electrostatic potential to CO2 offer an alternative. In these materials, the molecular CO2 guests are trapped by noncovalent interactions, hence they can be recycled by releasing the CO2 with a low energy penalty. Capacity and selectivity are the twin challenges for such porous adsorbents. Here, we show how a metal-organic framework, termed MUF-16 (MUF = Massey University Framework), is a universal adsorbent for CO2 that sequesters large quantities of CO2 from a broad palette of gas streams with record selectivities over competing gases. The crystallographically-determined position of the CO2 molecules captured in the framework pores illustrate how complementary noncovalent interactions envelop CO2 while repelling other guest molecules. The low affinity of the pore environment for other gases underpins the strikingly high selectivity of MUF-16 for CO2 over methane, nitrogen, hydrogen, acetylene, ethylene, ethane, propylene and propane. Breakthrough gas separations under dynamic conditions benefit from short time lags in the elution of the weakly-adsorbed component to deliver a repertoire of high-purity products. MUF-16 is an inexpensive, robust, recyclable adsorbent that is universally applicable to the removal of CO2 from sources such as natural gas, syngas, flue gas and chemical feedstocks.

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“…7,[9][10][11][12][13][14][15][16] This interest has led to the development of different screening strategies, adoption of various modelling techniques, and suggestion of a number of performance metrics for materials ranking. 7,12,14,[16][17][18][19][20] One important outcome of the recent developments in this area is the realization that adsorbent metrics (usually obtained from molecular simulations) do not directly correlate with process performance properties such as productivity and energy consumption of a particular separation process, hence should not be used as standalone criteria for materials screening. 21 A group of recent studies has proposed that to realistically predict performance of porous materials in pressure or vacuum swing adsorption (PSA/VSA) processes, one need to adopt a multiscale screening strategy where a series of molecular simulation techniques are combined with process modelling and optimization.…”

Section: Introductionmentioning

confidence: 99%