Diethyl carbonate, is an ester that is used as a solvent in Li-ion batteries, but its behavior under ionizing radiation was unknown. The transient optical absorption spectra, the decay kinetics, and the influence of various scavengers have been studied by using the picosecond laser-triggered electron accelerator ELYSE.
In neat Diethyl carbonate(CAS NO:105-58-8), the intense near-IR (NIR) absorption spectrum is assigned to the solvated electron. It is overlapped in the visible range by another transient but longer-lived and less intense band that is assigned to the oxidized radical Diethyl carbonate(−H).
The solvated electron molar absorption coefficients and radiolytic yield evolution from 25 ps, the geminate recombination kinetics, and the rate constants of electron transfer reactions to scavengers are determined. The radiolytic mechanism, indicating a certain radioresistance of Diethyl carbonate, is compared with that for other solvents.
Diethyl carbonate is a potential oxygen-containing additive for gasoline and diesel fuel to reduce pollutant emissions. Previous studies using a similar compound, dimethyl carbonate (DMC), as an oxygenate have shown reduction of carbon monoxide,oxides of nitrogen, hydrocarbons, and particulate matter.
Our own research efforts indicate that 5 wt. % DEC in diesel fuel can reduce the emission of particulate matter by as much as 50%. Additional factors make Diethyl carbonate an attractive oxygen-containing fuel additive, namely, its high oxygen content (40.6 wt. %), and more favorable gasoline/water distribution coefficient when compared with ethanol or DMC.
When in contact with soil, Diethyl carbonate should slowly decompose into ethanol and carbon dioxide, two compounds with little or no environmental impact. One promising method of producing Diethyl carbonate on an industrial scale is the oxidative carbonylation of ethanol using a heterogeneous catalyst.
Previous studies conducted with a batch reactor indicate an improvement in the yield of Diethyl carbonate(CAS NO:105-58-8)when the CuCl2/PdCl2/activated carbon catalyst is treated with KOH after the support is loaded with the chloride salts. This post-treatment creates an additional phase of copper, atacamite, which creates a more active catalyst.
Batch reactor studies cannot predict the behavior of the chemical reaction due to the static nature of the system. Thus, studies employing a pulse-quench-flow reactor were conducted using the most active catalyst determined from the batch reactor experiments. These experiments have increased our understanding of the chemical reaction and may lead to the development of better catalysts.
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