Recent developments in state-of-the-art silica-modified catalysts for the fixation of CO₂ in epoxides to form organic carbonates

Abstract

The discharge of CO2 into the atmosphere has become a crucial issue for mankind and a great threat to the environment due to escalating consequences of global warming. This grants...

Imidazolium-Functionalized Ionic Porous Aromatic Frameworks for CO2 Capture and In Situ Conversion

“…As illustrated in Table , both iPAF-167 and iPAF-168 exhibit a high conversion (>90%) and selectivity (>87%) on most substrates, whereas catalytic reactions cannot proceed if no catalysts are added in the system. These results proved the critical role of iPAF catalysts in this reaction, and their catalytic performances are comparable with many other catalysts, such as HBGX ionic liquid, COP-213, and Ti/Al-SBA-15. − The selectivity of iPAF-167 on cycloaddition of propylene oxide is relatively low (66%), which might be induced by the small size of substrate along with the high surface area of catalyst. Unsurprisingly, iPAF-168 with a higher concentration of imidazolium group presents a better catalytic ability compared to iPAF-167.…”

Recent Advancements in Metal‐catalysts Design for CO2/Epoxide Reactions

“…In such scenario, the reaction of CO 2 with epoxides represents one of the most studied reactions not only because of the possibility to react CO 2 with high reactive molecules but also because of the possibility, by regulating the reaction conditions and with a wise choice of the catalytic system, to obtain two useful products: cyclic organic carbonates (COCs) and aliphatic polycarbonates (APCs). [5][6][7][8][9][10][11][12][13][14] Notwithstanding the general trend to limit the use of metal centers in catalysis, [15][16][17] homogeneous catalytic systems based on metal complexes still offer the best option in terms of activity, selectivity, and mild reaction conditions. In this contribution we report the last advancements in the design of metal-catalyzed synthesis of cyclic carbonates and polycarbonates highlighting the new approaches conceived in the last three years of activity in these field.…”

“…In such scenario, the reaction of CO 2 with epoxides represents one of the most studied reactions not only because of the possibility to react CO 2 with high reactive molecules but also because of the possibility, by regulating the reaction conditions and with a wise choice of the catalytic system, to obtain two useful products: cyclic organic carbonates (COCs) and aliphatic polycarbonates (APCs) [5–14] …”

N/O-rich multilayered ultramicroporous carbon for highly efficient capture and conversion of CO2 under atmospheric conditions

“…The growth of carbon-based energy consumption has led to a steady increase in global atmospheric carbon dioxide (CO 2 ) concentrations, which are predicted to exceed 500 ppm by 2050, and ultimately imperil human existence. [1][2][3][4][5] To address this problem, efficient methods must be implemented to minimize CO 2 emissions from exhaust gases in industrial processes. Among them, carbon capture and utilization (CCU) has been recommended as the most operationally efficient strategy for reducing CO 2 emissions and mitigating climate change.…”