By Zhen-Zhen Yang
In this quantity, Professor He and his coworkers summarize polyethylene glycol (PEG)-promoted CO2 chemistry at the foundation of realizing approximately part habit of PEG/CO2 process and response mechanism at molecular point. As PEG will be applied as a eco-friendly substitute for natural solvents, phase-transfer catalyst, surfactant, aid in a variety of response platforms, considerably selling catalytic job and convalescing dear steel catalysts, really considered as a CO2-philic fabric, the authors specialize in unique functions of PEG in CO2 catch and usage, together with PEG-functionalized catalysts for effective transformation of CO2 and PEG-functionalized absorbents for effective CO2 seize.
Furthermore, they describe carbon seize and usage method as a substitute method of tackle the strength penalty challenge in carbon catch and garage.
Interestingly, the authors additionally talk about PEG radical chemistry in dense CO2 as quite inventive and strange use of PEG, most likely serves as a response medium and a thorough initiator for radical chemistry.
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Extra resources for Capture and Utilization of Carbon Dioxide with Polyethylene Glycol
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Z. 1007/978-3-642-31268-7_4, Ó The Author(s) 2012 41 42 4 CO2 Capture with PEG However, the energy penalty problem using traditional aqueous monoethanolamine (MEA) for this purpose has been estimated as 25–40 % [13, 14]. (2) Natural gas reserves (mainly CH4) are typically contaminated with over 40 % CO2 and N2, and CO2 separation occurs under high-pressure conditions and at high temperatures (250–450 °C) in this process [1, 15]. A number of excellent reviews have summarized advances in the field of CO2 capture and storage adopting different absorbents including liquid absorbents such as conventional aqueous amine solutions, chilled ammonia, and TSILs; solid absorbents such as zeolites, activated carbons, metal-based adsorbents, hydrotalcite-like compounds, organic and organic– inorganic hybrid adsorbents; membranes such as polymers, solubility-controlled membranes, carbon-based membranes, mixed-matrix membranes, and zeolite membranes [1, 11, 15–27].
Attaining high selectivity toward the desired product makes this methodology more practical in organic synthesis. These scrutinous 36 3 PEG/scCO2 Biphasic Solvent System findings inspired with a serendipity in the course of continuing effort devoted to developing efficient sustainable process for the oxidation of organic substrates such as alcohols and olefins in PEG/dense CO2 biphasic system lead to creating a novel concept of utilizable free-radical chemistry of PEG, and would thereby offer an environmentally friendly, metal-free, cost-efficient, and viable access to a diverse set of synthetic useful transformations without any additional free-radical initiator or a catalyst.