Solution‐reprocessable microporous polymeric adsorbents for carbon dioxide capture

Hu, Zhigang; Wang, Yuxiang; Wang, Xuerui; Zhai, Ling; Zhao, Dan

doi:10.1002/aic.16181

Cited by 18 publications

(18 citation statements)

References 71 publications

(103 reference statements)

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“…Both MOF-808(Zr) and MOF-808(Hf) exhibited moderate methane uptake capacities of 0.39 and 0.29 mmol g –1 (Figure b, Table S3), respectively, at 1 bar and 298 K, which are comparable to those of Zr-based MOFs with similar surface areas (0.3–0.6 mmol g –1 ). ,, Because of having a higher surface area, MOF-808(Zr) has a higher CO 2 uptake capacity (1.61 mmol g –1 ) than that of MOF-808(Hf) (1.45 mmol g –1 , Figure c, Table S3). The CO 2 uptake capacity is much higher than polymeric ionic liquid PAPIL-2 (0.15 mmol g –1 ) and PIM-1 (1.66 mmol g –1 ) but fairly lower than NDPC-700 (3.8 mmol g –1 ), SIFSIX-2-Cu-i (∼2.39 mmol g –1 ), Mg 2 (dobdc)-(N 2 H 4 ) 2 (∼5.18 mmol g –1 ), and Mg 2 (dobdc) (∼5.91 mmol g –1 ) . However, MOF-808(Zr) shows a comparable CO 2 uptake capacity to that of UiO-66(Zr) (1.79 mmol g –1 ) despite its higher BET surface area, indicating its weaker interactions due to the enlarged pore size unfavorable for low-pressure gas storage applications. ,, …”

Section: Results and Discussionmentioning

confidence: 88%

“…The CO 2 uptake capacity is much higher than polymeric ionic liquid PAPIL-2 (0.15 mmol g –1 ) and PIM-1 (1.66 mmol g –1 ) but fairly lower than NDPC-700 (3.8 mmol g –1 ), SIFSIX-2-Cu-i (∼2.39 mmol g –1 ), Mg 2 (dobdc)-(N 2 H 4 ) 2 (∼5.18 mmol g –1 ), and Mg 2 (dobdc) (∼5.91 mmol g –1 ) . However, MOF-808(Zr) shows a comparable CO 2 uptake capacity to that of UiO-66(Zr) (1.79 mmol g –1 ) despite its higher BET surface area, indicating its weaker interactions due to the enlarged pore size unfavorable for low-pressure gas storage applications. ,, …”

Section: Results and Discussionmentioning

confidence: 88%

“…72 However, MOF-808(Zr) shows a comparable CO 2 uptake capacity to that of UiO-66(Zr) (1.79 mmol g −1 ) despite its higher BET surface area, 73 indicating its weaker interactions due to the enlarged pore size unfavorable for low-pressure gas storage applications. 67,68,70 The interactions between MOF-808 and gas molecules were gauged by the isosteric heat of adsorption (Q st ) (Figures 6d−f, S6−S8, Table S3) calculated from the Clausius−Clapeyron equation (details in the Supporting Information). 74 MOF-808(Hf) displayed a higher zero-coverage Q st (8.2 kJ mol −1 ) of H 2 than that of MOF-808(Zr) (6.6 kJ mol −1 ) and was also higher than that of SNU-25 (∼6.6 kJ mol −1 ) 75 but lower than the current benchmark Mg-MOF (15.1 kJ mol −1 ) 75 and the optimal adsorption heat range (18.5−22 kJ mol −1 ) for hydrogen storage.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Modulated Hydrothermal Synthesis of Highly Stable MOF-808(Hf) for Methane Storage

Kundu

Wang

et al. 2020

ACS Sustainable Chem. Eng.

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The scaling-up issue, mechanical instability, and possible packing capacity loss during pelletization remain as the major obstacles for the application of metal−organic frameworks (MOFs) in practical methane storage. Herein, we present the modulated hydrothermal (MHT) synthesis of high-quality MOF-808(Hf) in a green and sustainable way at a high production rate of 1.8 g h −1 and space time yield of 86.8 kg m −3 day −1 . The MHT approach endows MOF-808(Hf) with a Brunauer−Emmett− Teller surface area of 1210 m 2 g −1 , which is comparable to those synthesized from the solvothermal approach. MOF-808(Hf) demonstrates a higher elastic modulus (37.5 ± 3.4 GPa) than that of MOF-808(Zr) (26.9 ± 5.2 GPa). In addition, MOF-808(Hf) shows a volumetric methane deliverable capacity of 110 v STP v −1 , which is among the highest-performing Zr/Hf-based MOFs for methane storage. It is worth noting that MOF-808(Hf) exhibits a higher pelletizing resistance than that of MOF-808(Zr) because of its higher structural integrity (mechanical strength), which makes this material promising for high-pressure natural gas storage.

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Section: Results and Discussionmentioning

confidence: 88%

Section: Results and Discussionmentioning

confidence: 88%

Section: ■ Results and Discussionmentioning

confidence: 99%

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Modulated Hydrothermal Synthesis of Highly Stable MOF-808(Hf) for Methane Storage

Kundu

Wang

et al. 2020

ACS Sustainable Chem. Eng.

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“…As the adsorption progressed, Q st values decreased slowly and Q st values at the initial stage mainly reflected specific interactions. As shown in Figure S1b, FCTF-1 exhibited a relatively high Q st value, 28.5 kJ/mol, higher than that of PIM-1 (20.8 kJ/mol) and many other inorganic materials, signifying that incorporating FCTF-1 indeed improved affinity to CO 2 molecules. In addition, The CO 2 capacity also reflected the adsorption affinity to CO 2 and had a direct relation with the number of affinity sites.…”

Section: Resultsmentioning

confidence: 93%

Mixed-Matrix Membranes with Covalent Triazine Framework Fillers in Polymers of Intrinsic Microporosity for CO₂ Separations

Jiang

Zhang

Huang

et al. 2019

Ind. Eng. Chem. Res.

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Polymers of intrinsic microporosity (PIMs) exhibit high permeability but moderate selectivity, which limits their industrial application in membrane gas separations. Here, a novel CO 2 -philic perfluorinated covalent triazine framework (FCTF-1) filler in a PIM-1 matrix is utilized to enhance gas selectivity and permeability simultaneously. The predominately organic nature of FCTF-1 improves interfacial compatibility with the polymer matrix. The presence of polar functionality, i.e., triazine rings and fluorine atoms, leads to the preferential sorption of CO 2 over CH 4 , thus increasing solubility selectivity, while the microporosity of FCTF-1 increases diffusion selectivity.

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“…As compared with some other polymers in the literature, these MA-based polymers performed well in CO 2 uptakes (Table ). ,− …”

Section: Resultsmentioning

confidence: 99%

Bifunctional Porous Organic Polymers Based on Postfunctionalization of the Ketone-Based Polymers

Wang

Chen

Xiao

et al. 2020

Ind. Eng. Chem. Res.

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Multifunctional porous organic polymers (POPs) are excellent porous materials for CO2 capture and Hg2+ adsorption. Especially, plentiful ultramicropores (d < 0.7 nm) and a high nitrogen (N) content are beneficial for CO2 capture, and the micropores and the specific functional groups are helpful for Hg2+ adsorption, while the facile construction of the multifunctional POPs still remains a challenge. Herein, a series of bifunctional POPs was simply fabricated from the ketone-based polymers on the basis of the postfunctionalization. Because of their low Brunauer–Emmett–Teller (BET) surface area (S BET) and pore volume (V total), the polymers were further carried out the Schiff-based reaction using melamine (MA) as the postmodifier. As the rigid external cross-linker, MA embedded in the pores of the polymers and supported the skeleton of the polymers. The resulting polymers showed a sharp increase of the S BET (up to 703 m2/g) and V total (up to 0.657 cm3/g), high N content (up to 36.95 wt %), and three-dimensional hierarchical porosity. In particular, the high ultramicropore volume (up to 0.199 cm3/g) of the resulting polymers made them effective for CO2 capture (193 mg/g; 273 K and 1 bar). The high micropore volume (up to 0.272 cm3/g) and abundant N (up to 36.95 wt %) offered them high Hg2+ capacity (425 mg/g at 298 K). This facile postfunctionalization strategy is potentially useful for the fabrication of some other multifunctional POPs.

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Solution‐reprocessable microporous polymeric adsorbents for carbon dioxide capture

Cited by 18 publications

References 71 publications

Modulated Hydrothermal Synthesis of Highly Stable MOF-808(Hf) for Methane Storage

Modulated Hydrothermal Synthesis of Highly Stable MOF-808(Hf) for Methane Storage

Mixed-Matrix Membranes with Covalent Triazine Framework Fillers in Polymers of Intrinsic Microporosity for CO₂ Separations

Bifunctional Porous Organic Polymers Based on Postfunctionalization of the Ketone-Based Polymers

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Solution‐reprocessable microporous polymeric adsorbents for carbon dioxide capture

Cited by 18 publications

References 71 publications

Modulated Hydrothermal Synthesis of Highly Stable MOF-808(Hf) for Methane Storage

Modulated Hydrothermal Synthesis of Highly Stable MOF-808(Hf) for Methane Storage

Mixed-Matrix Membranes with Covalent Triazine Framework Fillers in Polymers of Intrinsic Microporosity for CO2 Separations

Bifunctional Porous Organic Polymers Based on Postfunctionalization of the Ketone-Based Polymers

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Mixed-Matrix Membranes with Covalent Triazine Framework Fillers in Polymers of Intrinsic Microporosity for CO₂ Separations