N-Tridecane

Hydrotreating was carried out at 3.1 MPa (450 psig) and 613 K (340 °C) in a three-phase upflow fixed-bed reactor (Figure 1). The feed liquid was prepared by combining different quantities of 1.0 wt% tetralin (Aldrich, 99%), 0.02 wt% N as quinoline (Aldrich, 99%), 0.05 wt% S as 4,6-dimethyldibenzothiophene (4,6-DMDBT, Fisher, 95%), 0.3 wt% S as dimethyldisulfide (DMDS, Aldrich, 99%), n-octane (Aldrich, 99%), and balance n-tridecane (Alfa Aesar, 99%). Liquid product compositions were determined with a Hewlett-Packard 5890A chromatograph equipped with a 50 m dimethylsiloxane colunm (Chrompack, CPSil 5B) of 0.32 mm i.d. Reaction products were identified by matching retention times with commercially available standards. 

Figure 2.12 Plot of the logaritlm of the specific retention volune and colunn efficiency (plates per aeter) as a function of column tM erature for benzaldehyde (BZA) and n-tridecane (C ) on the stationary phase tetra-n-butylanmonium picrate. (Reproduced with permission from ref. 58. Copyright Blsevier Scientific Publishing Co.)...

FIGURE 2.1.1.1.29.1 Logarithm of vapor pressure versus reciprocal temperature for n-tridecane. 

After 15 days of degradation only low amounts of degradation products have evolved, the amount being lower than the detection limit of the GC system. After 17 weeks, however, 2-butanol, propionic acid, 1-pentanol, but3nic acid, valeric acid and caproic acid were detected in pH 6 water fraction. After another 20 weeks several alkanes could also be detected n-octane, n-nonane, n-decane, n-dodecane, n-tridecane and n-tetradecane (13). 

Figure 2.1 Density of a liquid versus the coordinate normal to its surface (a) is a schematic plot (b) results from molecular dynamics simulations of a n-tridecane (C13H28) at 27°C adapted from Ref. [11]. Tridecane is practically not volatile. For this reason the density in the vapor phase is negligible.

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