Abstract
A mixture of methanol and propanol (2:1 mole ratio) has been converted to C 2-C 4 gases and gasoline range hydrocarbons with a low (60:1) and high (800:1) Si/Al H-ZSM-5 type zeolite catalyst. In one case the methanol was labeled with 14C and the propanol was unlabeled; in the other instance the labeling was reversed so that propanol was labeled. The data are consistent with the major fraction of the C n + 1 + hydrocarbons ( n = 3 or greater) being derived from the alkylation of the C n + hydrocarbons with a C 1 species derived from methanol. An alkene oligomerization/cracking reaction pathway is superimposed upon the alkylation reaction pathway and this redistributes the 14C isotope to produce C 4, C 5 and C 7 carbon number groupings which have a relative activity corresponding to a near equilibration of the carbon isotopes.
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