Hydrocarbon conversion on ZSM-5 in the presence of N2O: relative reactivity and routes of product formation studied by GC-MS and C-13 NMR

Oxidative conversion of methane, ethane, propane, benzene, hydrogen and the ir binary mixtures R1-R2-N2O-He (where R1, R2 are substances under study) w ere studied on HZSM-5 at 350-450 degrees C. Relative reactivities were esti mated, rate of conversion of hydrocarbons correlating with the strength of C-H bond. C-13 label distribution in the product of (CH4)-C-13-C6H6-N2O fee d was studied by GC-MS, H-1 and C-13 NMR. It was shown that methane was cap able to alkylate the aromatic ring under reaction condition, giving toluene and xylenes from benzene. (C) 2000 Elsevier Science B.V. All rights reserv ed.