Lewis acidic water as a new carrier for facilitating CO<sub>2</sub> transport

Park, Seul Chan; Chae, Il Seok; Moon, Gi Hyeon; Kim, Byung Su; Jang, Jaeyoung; Weßling, Matthias; Kang, Yong Soo

doi:10.1039/c8ta10871d

Cited by 6 publications

(1 citation statement)

References 32 publications

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“…Hence, it can be concluded that DMC can be synthesized from CO 2 following a two-step synthetic approach, mentioned in the reaction Scheme 1. Besides confirming the origin of carbonyl carbon in DMC, in the 13 C NMR spectra of the reaction mixture, the peak for molecular CO2 at 123.01 ppm was also observed (Figure 5c) [30]. Hence, as shown in the reaction Scheme 3, this control experiment further proved that CO2 was released in the reaction mixture through the decomposition of [CH3CO3] -anions upon DMC synthesis.…”

Section: Resultssupporting

confidence: 65%

One-Pot, Metal-Free Synthesis of Dimethyl Carbonate from CO2 at Room Temperature

Khokarale

Bui

Mikkola

2020

Sustainable Chemistry

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Herein, we report on the metal-free, one-pot synthesis of industrially important dimethyl carbonate (DMC) from molecular CO2 under ambient conditions. In this process, initially the CO2 was chemisorbed through the formation of a switchable ionic liquid (SIL), [DBUH] [CH3CO3], by the interaction of CO2 with an equivalent mixture of organic superbase 1,8-diazabicyclo-[5.4.0]-undec-7-ene (DBU) and methanol. The obtained SIL further reacted with methyl iodide (CH3I) to form DMC. The synthesis was carried out in both dimethyl sulfoxide (DMSO) and methanol. Methanol is preferred, as it not only served as a reagent and solvent in CO2 capture and DMC synthesis, but it also assisted in controlling the side reactions between chemical species such as CH3I and [DBUH]+ cation and increased the yield of DMC. Hence, the use of methanol avoided the loss of captured CO2 and favored the formation of DMC with high selectivity. Under the applied reaction conditions, 89% of the captured CO2 was converted to DMC. DBU was obtained, achieving 86% recovery of its salts formed during the synthesis. Most importantly, in this report we describe a simple and renewable solvent-based process for a metal-free approach to DMC synthesis under industrially feasible reaction conditions.

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Section: Resultssupporting

confidence: 65%