J. Houzvicka et al., ZSM-5 - AN ACTIVE, SELECTIVE AND STABLE CATALYST FOR SKELETAL ISOMERIZATION OF N-BUTENE, Applied catalysis. A, General, 165(1-2), 1997, pp. 443-449
A series of H-ZSM-5 catalysts with a varying Si/Al ratio, varying part
icle size and varying substitution (Fe for Al) has been studied in ske
letal isomerisation of n-butene in continuous flow experiments. The va
rious H-ZSM-5 catalysts which, unlike the other 10-membered ring molec
ular sieves, show a very low selectivity at standard conditions, have
been used under modified reaction conditions. After changes on the cat
alyst, and under optimised conditions ZSM-5 showed rather high selecti
vity and yield of isobutene. The just mentioned modifications were sug
gested on basis of the knowledge on the mechanism of skeletal isomeris
ation and of the accompanying side reactions. (C) 1997 Elsevier Scienc
e B.V.