Highly efficient CO2 fixation into cyclic carbonate by hydroxyl-functionalized protic ionic liquids at atmospheric pressure

Cheng, Li; Liu, Fei; Zhao, Tianxiang; Gu, Jiarui; Chen, Peng; Chen, Teng

doi:10.1016/j.mcat.2021.111756

Cited by 26 publications

(16 citation statements)

References 45 publications

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“…To date, a plethora of catalysts have been developed for this transformation. In earlier research, homogeneous organocatalysts, such as Schiff bases and organic bases [7], organic salts [8,9], metal Salen complexes [10,11] and metalloporphyrin complexes [12,13] have been used as effective catalysts for this reaction. However, difficult recycle of homogeneous catalysts limits their practical application.…”

Section: Introductionmentioning

confidence: 99%

Covalent Organic Frameworks for Simultaneous CO2 Capture and Selective Catalytic Transformation

Zhang

Zuo

et al. 2021

Catalysts

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Combination of capture and simultaneous conversion of CO2 into valuable chemicals is a fascinating strategy for reducing CO2 emissions. Therefore, searching for heterogeneous catalysts for efficient catalytic conversion of CO2 is of great importance for carbon capture and utilization. Herein, we report a metalloporphyrin-based covalent organic framework (Co(II)@TA-TF COF) that can capture CO2 and simultaneously convert it into cyclic carbonates under mild conditions. The COF was designed to possess micropores for the adsorption of CO2 and integrated with cobalt(II) porphyrin (Co(II)@TAPP) units as catalytic sites into the vertices of the layered tetragonal networks. The structure of the Co(II)@TA-TF COF is unique where Co(II)@TAPP units are alternately stacked along the z direction with a slipped distance of 1.7 Å, which gives an accessible space to accommodate small molecules, making it possible to expose catalytic sites to substrates within the adjacent stacked layers. As a result, this COF is found to be highly effective for the addition of CO2 and epoxides. Importantly, the Co(II)@TA-TF COF exhibited a dramatic size selectivity for substrates. In conjunction with its reusability, our results highlight the development of a new function of COFs for targeting simultaneous CO2 absorption and utilization upon complementary exploration of the structural features of skeletons and pores. Such promising catalytic performance of the COF makes it possible for its potential practical application.

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Section: Introductionmentioning

confidence: 99%

Covalent Organic Frameworks for Simultaneous CO2 Capture and Selective Catalytic Transformation

Zhang

Zuo

et al. 2021

Catalysts

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“… 2 , 3 However, the burning flue gas produces a CO 2 yield of less than 15%, while the high temperature of the flue gas and the low partial pressure of CO 2 result in a low thermodynamic driving force, which poses a great challenge for the development of efficient and low-cost CO 2 capture technologies. 4 − 6 …”

Section: Introductionmentioning

confidence: 99%

Highly Efficient Absorption of CO₂ by Protic Ionic Liquids-Amine Blends at High Temperatures

Zhao

Yang

et al. 2021

ACS Omega

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In view of the increasingly serious harm of CO 2 to the environment, it is highly desirable to develop effective CO 2 absorbents. In this work, we demonstrated an efficient absorption of CO 2 by blends of protic ionic liquids (PILs) plus amines. The density and viscosity of investigative four PILs-amine mixtures were measured. By systematically studying the effects of the solution ratio, temperature, CO 2 partial pressure, and water content on the absorption of CO 2 , it is found that the 3-dimethylamino-1-propylamine acetate ([DMAPAH][OAc]) plus ethanediamine (EDA) mixture shows the highest CO 2 uptake of 0.295 g CO 2 per g absorbent at 50 °C and 1 bar and a further increase in the absorption of CO 2 to 0.299 g/g by adding water with a mass fraction of 20%. Furthermore, the absorption mechanism of CO 2 in the presence and absence of water has also been investigated by FTIR and NMR spectra.

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“… 2 , 3 Many options for reducing CO 2 emissions had been investigated and liquid amine adsorption was generally considered to be one of the most effective methods of CO 2 capture. 4 , 5 However, this method has some disadvantages such as high cost, high energy consumption, amine losses, and high corrosiveness. These issues limit the potential of liquid amines for CO 2 capture applications.…”

Section: Introductionmentioning

confidence: 99%

Polyethyleneimine-Modified Amorphous Silica for the Selective Adsorption of CO₂/N₂ at High Temperatures

Wang

Yang

et al. 2021

ACS Omega

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Mechanochemistry is very attractive as an efficient, solvent-free, and simplified technique for the preparation of composite adsorbents. Here, a series of polyethyleneimine (PEI)-modified SiO 2 adsorbents were prepared via mechanical ball milling for selective adsorption of CO 2 at high temperatures. The structural properties of these adsorbents were characterized by XRD, SEM, TGA, FTIR, and N 2 adsorption–desorption. This method can better disperse the PEI evenly in the SiO 2 as well as maintain the porous structure of the adsorbents by comparing with the impregnated adsorbents. These adsorbents presented appreciable performance in separating CO 2 at high temperatures, and the CO 2 adsorption capacity of PEI(70%)/SiO 2 is up to 2.47 mmol/g at 70 °C and 1.5 bar, which is significantly higher than that of the same type of CO 2 adsorbent reported in the literature. Furthermore, the adsorbent of PEI(70%)/SiO 2 provided an ideally infinite selectivity for CO 2 /N 2 (15:85) at 70 °C. These results showed that mechanical grinding methods are a simple and effective approach to producing amine-modified silica composite adsorbents.

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Highly efficient CO2 fixation into cyclic carbonate by hydroxyl-functionalized protic ionic liquids at atmospheric pressure

Cited by 26 publications

References 45 publications

Covalent Organic Frameworks for Simultaneous CO2 Capture and Selective Catalytic Transformation

Covalent Organic Frameworks for Simultaneous CO2 Capture and Selective Catalytic Transformation

Highly Efficient Absorption of CO₂ by Protic Ionic Liquids-Amine Blends at High Temperatures

Polyethyleneimine-Modified Amorphous Silica for the Selective Adsorption of CO₂/N₂ at High Temperatures

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Highly efficient CO2 fixation into cyclic carbonate by hydroxyl-functionalized protic ionic liquids at atmospheric pressure

Cited by 26 publications

References 45 publications

Covalent Organic Frameworks for Simultaneous CO2 Capture and Selective Catalytic Transformation

Covalent Organic Frameworks for Simultaneous CO2 Capture and Selective Catalytic Transformation

Highly Efficient Absorption of CO2 by Protic Ionic Liquids-Amine Blends at High Temperatures

Polyethyleneimine-Modified Amorphous Silica for the Selective Adsorption of CO2/N2 at High Temperatures

Contact Info

Product

Resources

About

Highly Efficient Absorption of CO₂ by Protic Ionic Liquids-Amine Blends at High Temperatures

Polyethyleneimine-Modified Amorphous Silica for the Selective Adsorption of CO₂/N₂ at High Temperatures