Abstract
The hydroconversion of n-heptane has been studied either in the presence or absence of NH 3 on a hydrocracking catalyst prealably deactivated by coke in an industrial unit. When NH 3 is added, a loss of activity is observed (deactivation) but is totally reversible (inhibition). This loss is all the more important as long as the NH 3 partial pressure increases. An equation linking the hydroconversion rate of n-heptane and the pressure of ammonia has been elaborated. It is based on a classical bifunctional mechanism assuming that the limiting step is the isomerisation of intermediate n-heptanic carbenium ions. In industrial units, this equation could be used to ajust the operating conditions each time the feed is changed.
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Schedule a callMore From: Comptes Rendus de l'Academie des Sciences Series IIB Mechanics Physics Chemistry Astronomy
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