Pentane ignition temperature

Pentane Bp, °C Flash point, °C Ignition temperature, °C Lower Upper... 

Oxygen concentration has also been found to have a pronounced effect on ignition temperature. Mason and Wheeler,78 using an electrically heated quartz tube as an ignition chamber and the dynamic flow method found that the ignition temperature of pentane in oxygen was lowered from 548° C. to 4/6° C. by increasing the pentane concentration from 1.50 per cent to 7.65 per cent. 

Hexane is a six-carbon alkane and has a boiling point of 156°F, a flash point of -7°F, a flammable range of 1.1 to 7.5%, and an ignition temperature of 437°F. The structure and molecular formula for pentane are shown in Figure 5.29. 

When the complex in pentane at ambient temperature was deliberately exposed to air to produce pentamethylcyclopentadienyltetramethyliridium, it occasionally ignited. Using proper precautions it is not dangerous, but increase in scale above 0.4 mmol is not advised. 

Oxidation of alkanethiols to alkanesulfonic acids with excess cone, acid as usually described is potentially hazardous, the exotherm often causing ignition of the thiol. A modified method involving oxidation under nitrogen and at temperatures 1-2 C above the m.p. of the thiol is safer and gives purer products [1]. Technical butanethiol (containing 28% of propane- and 7% of pentane-thiols) is hypergolic with 96% acid [2], Oxidation of several thiols to the sulfonic acids by addition to stirred cone, acid had been effected normally, but when 2 new... 

Fig. 6,7. Pressure and light output records typical of those observed from the two-stage ignition of hydrocarbons. These results were obtained by the authors during the combustion of n-pentane in a rapid compression machine. The duration of the compression stroke was 22 ms, as shown in the lower pressure record. The first- and second-stage time intervals, measured from the end of compression, are marked as ti and T2 respectively. Compressed gas temperature derived from (6.16) was 740 K [49].

Fig. 7.8. The effect of two types of anti-knock on the characteristics of two-stage ignition measured in a rapid compression machine. Ti is the time from the end of compression to the cool-flame is the subsequent time to the true ignition AT is the temperature rise over the cool-flame. Conditions 0.5 stoichiometric mixture of 2-methyl pentane and air at 720 K and total concentration 3.2 x 10 mol cm . TEL (tetra-ethyl lead) affects the second stage, but not ti, NMA (N-methyl aniline) affects both ti and t2. From [42],...

A 0.422-g sample of pentane, CjHj2, is placed in a 4.00-L reaction vessel with excess O2. The mixture is then ignited and the sample burns with complete combustion. What will be the partial pressures of CO2 and of H20(g) in the reaction vessel if the final temperature is 300.°C ... 

---