OZONE-ISOPRENE REACTIONS - PRODUCT FORMATION AND AEROSOL POTENTIAL
OZONE-ISOPRENE REACTIONS - PRODUCT FORMATION AND AEROSOL POTENTIAL
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DOI：
10.1002/kin.550140902
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发表时间：
1982-01-01
影响因子：
1.5
通讯作者：
COLE, EI
中科院分区：
文献类型：
--
作者：
KAMENS, RM;GERY, MW;COLE, EI
讨论了异戊二烯和O3之间的暗相实验。在高浓度异戊二烯和O3（5 ppm C和1 ppm）体系中，大约75%的反应碳可以在HCHO、CO、甲基丙烯醛、甲基乙烯基酮、甲基乙二醛、乙醛和丙烯的产物形成中观察到。开发了合理适合MACR、MVK、异戊二烯和O3暗相室实验的机制。实验数据和建模结果被用来生成对MVK和MACR的O3攻击率。使用的异戊二烯-O3速率为1.67 × 10− 2 ppm −1·min− 1，与文献中报道的其他速率一致。深色异戊二烯-O3系统似乎形成均匀成核的气溶胶。这些颗粒中的大多数出现并保持在远低于光学截止区域（0.3-0.5 μm）的直径，与来自类似α-蒎烯-O3系统的颗粒相反，后者也以较小的尺寸形成，但随后生长到光学尺寸范围（0.5 μm）。较低浓度的α-蒎烯和O3（0.2 ppm C和0.12 ppm）仍然产生大量的气溶胶，但相比之下，在异戊二烯和O3的类似并排系统中没有观察到快速CN成核。
Dark‐phase experiments between isoprene and O3are discussed. UNC outdoor chamber experiments have shown that in high‐concentration systems of isoprene and O3(5 ppm C and 1 ppm) approximately 75% of the reacted carbon can be observed in the product formation of HCHO, CO, methacrolein, methylvinylketone, methylglyoxal, acetaldehyde, and propylene. Mechanisms were developed which gave reasonable fits to dark‐phase chamber experiments of MACR, MVK, isoprene, and O3. Experimental data and modeling results were used to generate O3rates of attack on MVK and MACR. An isoprene–O3rate of 1.67 × 10−2ppm−1·min−1was used and is consistent with other rates reported in the literature. Dark isoprene–O3systems appear to form homogeneously nucleated aerosol. Most of these particles appear and remain at diameters well below the optical cutoff region (0.3–0.5 μm), as opposed to the particles from similar α‐pinene–O3systems, which also form at smaller sizes but then grow into the optical size range (0.5 μm). Lower concentrations of α‐pinene and O3(0.2 ppm C and 0.12 ppm) still generated substantial aerosol, but by comparison, rapid CN nucleation was not observed during a similar side‐by‐side system of isoprene and O3.