STUDY OF ENDOTHERMIC HYDROCARBON FUEL CRACKING ON ZSM-5 ZEOLITES MODIFIED BY Ag AND La

In order to improve endothermic capability of endothermic hydrocarbon fuels,HZSM-5 zeolites were exchanged with La 3+ or Ag +. Endothermic hydrocarbon fuel NNJ-150 cracked on HZSM-5 and modified HZSM-5 was investigated. Results showed that the selectivity of light olefins was improved 81.63% at 500?℃ while the cracking conversion was not depressed (500?℃,HZSM-5,64.62%;LaZSM-5,65.71%;AgZSM-5,68.75%) when the HZSM-5 was modified by La 3+ and Ag +. The lifetime of catalyst was kept unchanged when NNJ-150 was cracking on modified ZSM-5 and un-modified ZSM-5. Experimental result showed that catalyst modified by La 3+ and Ag + at same time should be studied in the future.