Study of low temperature flames of n-hexane

✍ Scribed by Shigeaki Sueyasu; Tsutomu Hikita

• Publisher: Elsevier Science
• Year: 1965
• Tongue: English
• Weight: 313 KB
• Volume: 9
• Category: Article
• ISSN: 0010-2180
• DOI: 10.1016/0010-2180(65)90002-7

✦ Synopsis

An experimental study oJ low temperature flames of n-hexane has been conducted by means of a flow method using a Pyrex conical reactor over the temperature range of 250 ° to 470°C. New information obtained is summarized as follows: (I) Under the proper conditions, the three flames, first-and second-stage cool ]lames and blue flame, remain stationary; (2) The apparent activation energies for the propagation o] these flames defined by Kaskan's equation are found to be ca. 6 hcal /rnole Jot the blue flame, and ca. 12 kcal/mote ]or the second-stage coot flame;

(3) The addition of ethylene to n-hexane-oxygen-nitrogen mixtures has little effect on the propagation velocities of these [lames. The above results lead to the supposition that the three flames correspond to the three bends on the ignition limit curves drawn on the pressure/ temperature diagram and that the negative temperature coefficient of the overall reaction rate may not be attributable to self-inhibition due to lower olefins such as ethylene as an intermediate product.