HYDROCONVERSION OF N-HEPTANE OVER CO NI CONTAINING HZSM5/

Ni and Co containing HZSM5 zeolites were compared in the hydroconversi on of n-heptane at 460-710 K and a pressure of up to 2 bar. Hydrocrack ing and hydrogenolysis were observed to be competing reaction pathways over CoHZSM5 and NiHZSM5. n-Heptane reacted directly to methane and s mall amounts of ethane over CoHZSM5, i.e., hydrogenolysis prevailed, o ver NiHZSM5 the main reaction products were propane and i-butane i.e., hydrocracking was dominant. With increasing hydrogen partial pressure hydrogenolysis decreased while hydrocracking increased over both meta l containing ZSM5 zeolites.