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Extra resources for Advances in Chemical Propulsion (auth unkn) [No TOC]
Udaykumar, W. Shyy, and A. P. Marchand. 1997. Ignition characteristics of a new high-energy strained fuel in high-speed ﬂows. J. Propulsion Power 13:246–49. © 2002 by CRC Press LLC 38. Kabo, G. , A. A. Kozyro, A. P. Marchand, V. V. Diky, V. V. Simirsky, L. S. Ivashkevich, A. P. Krasulin, V. M. Sevruk, and M. L. Frenkel. 1994. Thermodynamic properties of heptacyclotetradecane, C14 H16 . J. Chem. Thermodynamics 26: 129–42. 39. Kabo, G. , A. A. Kozyro, V. V. Diky, V. V. Simirsky, L. S. Ivashkevich, A.
7. Cubane is found to be stable on the millisecond time scale for temperatures up to ∼ 500 K. Minor decomposition was found between 500 and 700 K, and above that point decomposition is faster than the ﬂow tube residence time. By 800 K there is essentially no remaining cubane. The dominant product channel is loss of C2 H2 , yielding benzene. Some rearrangement to COT was observed above ∼ 650 K, and a small amount of styrene was found at high temperatures. 2. 7 Pyrolysis breakdown behavior merization products would be for cubane: 1 — cubane; 2 — styrene; 3 — greater in higher pressure environ- COT; and 4 — C6 H6 + C2 H2 ments.
The advantage of the microﬂow tube is that sample consumption is very small. For the work discussed below, the consumption rate varied between ∼ 5 and ∼ 25 µg/s, allowing several hours of experiment time for 20–40 mg of sample. , the average distance that the molecules diﬀuse during the residence time in the hot zone, was about ﬁve times the tube diameter. The molecules diﬀused back and forth across the tube bore several times during their passage through the hot zone. On one hand, this eﬀectively averages out the radial dependence of the residence time, allowing us to treat the ﬂow as pseudo plug ﬂow.