The Thermal Decomposition of Straight-Chain Paraffins

Burk, Robert E.

doi:10.1021/j150326a022

Cited by 10 publications

(10 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To analyze the data, the temperature history of the substance, the activation energy of the bond that is expected to be broken, and the final moles reacted or fraction reacted are required. For hydrocarbons, Burk et al (1941) found that reasonable values for EV lie in the range 63,000 t 500 cal/mol (2,640 * 2 kJ/ mol), and this was confirmed by Voge and Good (1949), who studied the thermal decomposition of n-dodecane, isododecane and n-hexadecane. However, in our treatment, a variation of 2,000 cal (8.4 kJ) caused differences of only 0.0001 in the fraction of moles reacted.…”

Section: Analysis Of Experimental Results and Discussionmentioning

confidence: 56%

Measurement of critical temperatures of thermally unstable n‐Alkanes

1987

View full text Add to dashboard Cite

A modified sealed-tube apparatus has been developed for the measurement of the critical temperatures of thermally unstable fluids. The apparatus has been used to measure the critical temperatures of the normal alkanes from n-octane to n-hexadecane. Since the higher alkanes (with more than 10 carbon atoms) decompose at temperatures well below their critical temperatures, a new method of analysis of the apparent critical temperature vs. time data has been developed. This method employs reaction kinetics based on an irreversible first-order reaction and is used to linearize the data and to perform an unambiguous extrapolation to the critical temperature of the undecomposed substance. The method is successful because the temperature history of the substance is recorded by computer, and ampoule contents are analyzed at the completion of the experiment. The critical temperatures of the n-alkanes reported in this paper have been compared with values found in previous studies.

show abstract

Section: Analysis Of Experimental Results and Discussionmentioning

confidence: 56%

Measurement of critical temperatures of thermally unstable n‐Alkanes

1987

View full text Add to dashboard Cite

show abstract

“…This problem has been discussed recently by F. O. Rice (19) and by Burk (20); Burk upholds the view that a paraffin is split out in the initial act, while Rice assumes free radical formation. Both attempt to obtain evidence from the composition of the reaction products, but without any very striking successes.…”

Section: Redistribution Of Energy At Collisionsmentioning

confidence: 99%

The Dynamics of Unimolecular Reactions.

Kassel¹

1932

Chem. Rev.

View full text Add to dashboard Cite

“…C2H6--C'2H4 + H2 /-> ch2=ch-ch8 + h2 C3Hs( x-> ch2=ch2 + ch4 / ch2=ch-ch3 + ch4 Frey has also considered the role of hydrogen migration in the thermal decomposition of alkanes, including thé mechanism of transfer of a hydrogen atom from the carbon atom one removed from the fracture point to the other fragment formed (53). The possibilities include a dissociation into alkyl radicals, one of which acquires a hydrogen atom from the other (68), and a semi-ionization process whereby one radical may transfer its allegiance to the hydrogen atom of the other radical (13). Kassel has suggested that the decomposition may involve formation of alkane and alkylidene, the latter rearranging to alkene (85), or formation of three molecules without the formation of free alkyl radicals (86).…”

Section: Chs Chmentioning

confidence: 99%