Abstract
AbstractIt is shown that the addition of wax to a wax free neutral distillate has no synergistic effect on the initial rate constant for cracking. The initial rate constant is in fact found to be a linear function of the mole fraction of wax in the feed. At the same time it is found that the activation energy for the cracking of pure wax is ˜ 48 kcal/inole and is some 4 kcal/mole lower than the activation energy for the cracking of the wax free aromatics and cyclic aliphatics. We are therefore led to believe that the initial rate constant for the catalytic cracking of any mitxure of compounds is simply the sum of the individual rate constants weighted by their respective mole fractions.It is also shown that the introduction of wax into the wax free feed results in an increased apparent order of the overall reaction and in more rapid decay of catalyst activity.
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