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Kinetic study of the gas-phase reactions of OH and NO3 radicals and O-3 with selected vinyl ethers

机译:OH和NO3自由基与O-3与选定的乙烯基醚的气相反应的动力学研究

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摘要

Kinetic studies on the gas-phase reactions of OH and NO3 radicals and ozone with ethyl vinyl ether (EVE), propyl vinyl ether (PVE) and butyl vinyl ether (BVE) have been performed in a 405 L borosilicate glass chamber at 298 +/- 3 K in synthetic air using in situ FTIR spectroscopy to monitor the reactants. Using a relative kinetic method rate coefficients (in units of cm(3) molecule(-1) s(-1)) of (7.79 +/- 1.71) x 10(-11), (9.73 +/- 1.94) x 10(-11) and (1.13 +/- 0.31) x 10(-10) have been obtained for the reaction of OH with EVE, PVE and BVE, respectively, (1.40 +/- 0.35) x 10(-12), (1.85 +/- 0.53) x 10(-12) and (2.10 +/- 0.54) x 10(-12) for the reaction of NO3 with EVE, PVE and BVE, respectively, and (2.06 +/- 0.42) x 10(-16), (2.34 +/- 0.48) x 10(-16) and (2.59 +/- 0.52) x 10(-16) for the ozonolysis of EVE, PVE and BVE, respectively. Tropospheric lifetimes of EVE, PVE and BVE with respect to the reactions with reactive tropospheric species (OH, NO3 and O-3) have been estimated for typical OH and NO3 radical and ozone concentrations.
机译:OH和NO3自由基与臭氧与乙基乙烯基醚(EVE),丙基乙烯基醚(PVE)和丁基乙烯基醚(BVE)气相反应的动力学研究已在405 L硼硅酸盐玻璃室中于298 + / -使用原位FTIR光谱仪在合成空气中3 K监控反应物。使用相对动力学方法的速率系数(以cm(3)分子(-1)s(-1)为单位)为(7.79 +/- 1.71)x 10(-11),(9.73 +/- 1.94)x 10 OH与EVE,PVE和BVE的反应分别获得(-11)和(1.13 +/- 0.31)x 10(-12),(1.40 +/- 0.35)x 10(-12),( NO3与EVE,PVE和BVE的反应分别为1.85 +/- 0.53)x 10(-12)和(2.10 +/- 0.54)x 10(-12),以及(2.06 +/- 0.42)x 10 EVE,PVE和BVE的臭氧分解分别为(-16),(2.34 +/- 0.48)x 10(-16)和(2.59 +/- 0.52)x 10(-16)。对于典型的OH和NO3自由基和臭氧浓度,已经估计了EVE,PVE和BVE在对流层中与反应性对流层物质(OH,NO3和O-3)的对流层寿命。

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