The eternal battle to combat global warming: (thio)urea as a CO₂wet scrubbing agent

Abstract

CO2 binding by urea/thiourea compounds via the formation of carbamide–carboxylate (–CONH2–CO2) and carbamimidothiocarbonate (–NH–CS–CO2) sodium adducts.

In situ activation of green sorbents for CO2 capture upon end group backbiting

“…20 Other alternatives have been introduced in the literature, such as amine-based polymers. Our group 21,22 and others [23][24][25][26][27][28] have been exploiting urea-based motifs, which show the ability to absorb CO 2 . Interestingly, polyureas have not been intensively explored in this field.…”

Green Microwave‐Assisted Synthesis of Cyclic/Acyclic Ureas from Propylene Carbonate

“…Moreover, in organic synthesis, urea derivatives are used as solvents, [7] CAT, [8][9][10][11][12] catalysts in many chemical reactions, [13,14] and candidates for CO 2 capture. [15][16][17] Besides, It is used as fertilizers [18] and herbicides [19] in the agricultural sector. Several synthetic routes are found in the literature for the preparation of the urea-functionality urging the need toward greener approaches avoiding the use of the industriallyapplied, toxic and hazardous materials as phosgene or triphosgene [20,21] as well as carbon monoxide.…”

“…The presence of urea functional group in several compounds is known to have biological activity, [2] which make them important for medical and pharmaceutical applications [3] as being used as HIV‐1 Protease inhibitor, [4] anti‐microbial, [5] and anti‐tumor [6] agents. Moreover, in organic synthesis, urea derivatives are used as solvents, [7] CAT , [8–12] catalysts in many chemical reactions, [13,14] and candidates for CO 2 capture [15–17] . Besides, It is used as fertilizers [18] and herbicides [19] in the agricultural sector.…”

Formation of Dimethyl Carbonate from CO2 and Methanol Catalyzed by Me2SnO: A Density Functional Theory Approach

“…4 CO 2 has been used as a carbon source for production of important chemical intermediates such as ureas, carbamates, lactones, and carbonates. 2,7 From the various compounds that can be formed from CO 2 , organic carbonates are among those of highest interest. 8,9 Organic carbonates represent an important class of compounds in organic chemistry, recognized by their simple structure, low viscosity and toxicity, and easy degradability.…”

“…CCS may allow us to capture up to 90% of the CO 2 emitted in industrial processes based on fossil fuel burning. , Thus, the captured CO 2 can be used as a feedstock for chemical syntheses, as part of the cycle for carbon capture and utilization (CCU) . CO 2 has been used as a carbon source for production of important chemical intermediates such as ureas, carbamates, lactones, and carbonates. , From the various compounds that can be formed from CO 2 , organic carbonates are among those of highest interest. , …”