Cycloalkanes octane number

Balaban, A.T., Kier, L.B. and Joshi, N. (1992b). Structure-Property Analysis of Octane Numbers for Hydrocarbons (Alkanes, Cycloalkanes, Alkenes). MATCH (Comm.Math.Comp.Chem.), 28,13-27. 

In Figure 5.4, the temperature required to produce 100 research clear octane number reformate is shown as a function of time on stream in the reforming of a 99-17VC boiling range naphtha containing approximately 43, 45, and 12% by volume, respectively, of cycloalkanes, alkanes, and aromatic... 

In Figures 5.5 and 5.6, data on the platinum-iridium and platinum-rhenium catalysts are shown for the reforming of a 70-190 C boiling range Persian Gulf naphtha to produce 98 research octane number product at a pressure of 28.2 atm and a temperature of 490 C (33). The naphtha contained (on a liquid volume percentage basis) 69.7% alkanes, 18.5% cycloalkanes, and 11.8% aromatic hydrocarbons. The density of the naphtha was 0.7414 g/cm3. The data in Figure 5.5 show that the platinum-iridium catalyst is almost twice as active as the platinum-rhenium catalyst. 

In Figures 5.7 and 5.8, data are presented for the reforming of a 65-150°C boiling range Persian Gulf naphtha at a temperature of 488°C to produce 96 research octane number reformate (33). The pressure was 28.2 atm, except for a period at 35.0 atm in the approximate time interval from hour 1460 to hour 1710 in each run. The naphtha had a density of 0.7243 g/cm3 and contained, on a liquid volume percentage basis, 70.2% alkanes, 21.1% cycloalkanes, and 8.6% aromatic hydrocarbons. 

The two most important natural sources of alkanes are petroleum and natural gas. Petroleum is a complex liquid mixture of organic compounds, many of which are alkanes or cycloalkanes. For more details about how petroleum is refined to obtain gasoline, fuel oil, and other useful substances, read A Word about Petroleum, Gasoline, and Octane Number on pages 102-103. 

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