REACTIONS OF N-HEPTANE AND METHYLCYCLOPENTANE OVER AN OXYGEN-MODIFIEDMOLYBDENUM CARBIDE CATALYST - STUDY OF COKE FORMATION, CATALYST DEACTIVATION, AND REGENERATION
C. Phamhuu et al., REACTIONS OF N-HEPTANE AND METHYLCYCLOPENTANE OVER AN OXYGEN-MODIFIEDMOLYBDENUM CARBIDE CATALYST - STUDY OF COKE FORMATION, CATALYST DEACTIVATION, AND REGENERATION, Industrial & engineering chemistry research, 34(4), 1995, pp. 1107-1113
After an oxidative treatment, molybdenum carbide is an active and very
selective catalyst for the isomerization of n-heptane. An important p
arameter in the choice of a catalyst for application in industry is it
s resistance to deactivation by coke formation, which can be caused by
the presence of cyclic molecules. In this work, a study of the effect
of methylcyclopentane (MCP) on the deactivation of the oxygen-modifie
d molybdenum carbide catalyst has been performed. It has been found th
at the catalyst deactivates in the presence of pure MCP and that a low
er activity for heptane isomerization is obtained after the reaction u
nder MCP. TEM showed that coke formation is the cause of the deactivat
ion. It has also been shown that increasing the total pressure when th
e MCP is reacted leads to a large decrease in the catalyst deactivatio
n and that heptane isomerization can be carried out over this deactiva
ted sample with only a small loss in activity. Further, the catalyst c
an be totally regenerated in air.