Physical solvents that are alternatives for PEGDME in CO2 absorption was written by Miller, Matthew B.;Luebke, David R.;Enick, Robert M.. And the article was included in Preprints of Symposia – American Chemical Society, Division of Fuel Chemistry in 2011.Recommanded Product: (2R,3R,4S,5R,6R)-2-(Acetoxymethyl)-6-(((2S,3S,4R,5R)-3,4-diacetoxy-2,5-bis(acetoxymethyl)tetrahydrofuran-2-yl)oxy)tetrahydro-2H-pyran-3,4,5-triyl triacetate This article mentions the following:
Advanced gasification power plants will employ the water-gas shift reaction producing a high pressure gas-phase mixture containing CO2, H2 and water. This gas mixture at elevated pressures provides ample driving force to use a phys. solvent that will selectively absorb, not chem. bind, to the CO2. Potential phys. absorbers include (a) liquid mixtures of CO2-philic polydisperse oligomers, (b) small, volatile, liquid CO2-philic solvents, and (c) CO2-philic solids capable of melting in the presence of CO2. This study identified alternative phys. solvents that would selectively dissolve only CO2 from this mixture The first phase of research compared the CO2 solvent strength of poly(propylene glycol) di-Me ether (PEGDME) with that of other low volatility oligomers known to be “CO2-philic”. These oligomeric solvent candidates include PPGDME, poly(propylene glycol) di-acetate (PPGDAc), poly(butylene glycol) di-acetate (PBGDAc) with linear or branched C4 monomers, poly(di-Me siloxane) (PDMS), perfluoropolyether (PFPE), and glycerol tri-acetate (GTA). Pressure-composition phase diagrams are presented for the pseudo-binary systems of CO2 with PEGDME n = 6, PPGDME n = 6, PDMS n = 6, PBGDAc n = 3.2, PPGDAc n = 6.7, and GTA (which is analogous to a trimer of polyvinyl acetate), each at 25° and 40°. Although the performance of PPGDME, PEGDME and PDMS are comparable on a weight basis, PPGDME and PDMS appear to be the best CO2 solvents based on the ability to absorb CO2. Viscosity at 22° and 40°, a property of interest upon commercialization of these compounds, indicated PDMS is significantly less viscous than all others, including PEGDME. Further, PDMS and PFPE are essentially immiscible with water, and water is only slightly soluble in PPG- and PBG-based oligomers and GTA, whereas water and PPGDME are completely miscible. Small volatile CO2 solvents were examined in the second phase of this work. Phase behavior results in the form of pressure-composition diagrams are presented for the binary systems of CO2 and acetone, Me acetate, 1,4-dioxane, 2-methoxyethyl acetate, methanol, 2-nitropropane, n,n-dimethylacetamide, acetylacetone, 1-nitropropane, isooctane, 2-(2-butoxyethoxy)ethyl acetate, n-formylmorpholine, propylene carbonate, 2-butoxyethyl acetate, and n-tert-butylformamide. Acetone, Me acetate and 1,4-dioxane are the most CO2-philic compounds on a weight basis; however, their b.ps. are relatively low. Acetone, Me acetate and 1,4-dioxane are the most CO2-philic compounds on a weight basis, however, their b.ps. are relatively low. 2-Methoxyethyl acetate, the next best solvent, has a significantly higher b.p. The best performing solvents on a molar basis are 2-(2-butoxyethoxy)ethyl acetate, Me acetate, and 2-methoxyethyl acetate. Hydrocarbon solvents that are highly oxygenated tend to be CO2-philic so long as the oxygens are contained in carbonyl group, ether, or acetate groups. The hydroxyl group, however, is a CO2-phobic moiety. Last, solid CO2-philes have been investigated as a potential CO2 solvent. These solids are typically sugar acetates, or benzene rings having tert-Bu groups and acetate groups attached to the aromatic ring the benzene, or ether oxygens within the ring. The solid solvents that were investigated are β-D-ribofuranose 1,2,3,5-tetraacetate, 2,6-di-tert-butyl-4-methylphenol, 1,2,4-triacetoxybenzene, 2,4-di-tert-butylphenol, sucrose octaacetate, and 1,3,5-trioxane. The unique property of solid solvents is that the CO2 can be desorbed at an elevated pressure (the three-phase SLV pressure), as opposed to a typical pressure swing desorption pressure that is usually around or a little above 1 atm. The ability of these solvents to melt in the presence of substantial amounts of hydrogen in the gas mixture and selectively absorb CO2 will be presented. In the experiment, the researchers used many compounds, for example, (2R,3R,4S,5R,6R)-2-(Acetoxymethyl)-6-(((2S,3S,4R,5R)-3,4-diacetoxy-2,5-bis(acetoxymethyl)tetrahydrofuran-2-yl)oxy)tetrahydro-2H-pyran-3,4,5-triyl triacetate (cas: 126-14-7Recommanded Product: (2R,3R,4S,5R,6R)-2-(Acetoxymethyl)-6-(((2S,3S,4R,5R)-3,4-diacetoxy-2,5-bis(acetoxymethyl)tetrahydrofuran-2-yl)oxy)tetrahydro-2H-pyran-3,4,5-triyl triacetate).
(2R,3R,4S,5R,6R)-2-(Acetoxymethyl)-6-(((2S,3S,4R,5R)-3,4-diacetoxy-2,5-bis(acetoxymethyl)tetrahydrofuran-2-yl)oxy)tetrahydro-2H-pyran-3,4,5-triyl triacetate (cas: 126-14-7) belongs to tetrahydrofuran derivatives. Tetrahydrofuran (THF) is a Lewis base that bonds to a variety of Lewis acids such as I2, phenols, triethylaluminum and bis(hexafluoroacetylacetonato)copper(II). Oxidations have also proved to be valuable and efficient approaches to chiral tetrahydrofuran derivatives.Recommanded Product: (2R,3R,4S,5R,6R)-2-(Acetoxymethyl)-6-(((2S,3S,4R,5R)-3,4-diacetoxy-2,5-bis(acetoxymethyl)tetrahydrofuran-2-yl)oxy)tetrahydro-2H-pyran-3,4,5-triyl triacetate
Referemce:
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem