Thermal cracking of n-Hexane, the major component of naphtha was carried out the similar temperature range of commercial naphtha cracking unit operation, in order to search the data for reactor design.
In this work the lighter fraction of naphtha and the n-Hexane were decomposed thermally at the reaction temperature range 650-800 ℃ and catalytically at 600∼700 ℃ for the comparison.
The gaseous product was analyzed by gas chromatography.
The combination of the mole fractions of gaseous product and equilibrium constants （Kn） of several subsystems in all the decomposition reaction was plotted against the pyrolysis severity function (t·θ^0.06).
Then, distribution of the major gas components could be roughly predicted by the severity function.
The actual weight percent of ethylene was 15∼25 % in the range of pyrolysis severity function 1,300∼1,500 and was compared with the estimated value from the empirical equation proposed by H. R. Linden and J. M. Reid^1）.
It is possibly considered that n-Hexane can be used as the representative component to obtain the reactor design data of naphtha cracking unit experimentally, for the difference of gas distribution between naphtha and n-Hexane cracking was not clearly found.