MA Tong, GENG Zubao, LI Bing, et al. Difference of acid characters and catalytic cracking performance between ZSM-5 zeolites synthesized with various templates[J]. CIESC Journal, 2016, (8): 3374-3379.
MA Tong, GENG Zubao, LI Bing, et al. Difference of acid characters and catalytic cracking performance between ZSM-5 zeolites synthesized with various templates[J]. CIESC Journal, 2016, (8): 3374-3379.DOI: 10.11949/j.issn.0438-1157.20160397.
ZSM-5 zeolites with similar crystal size and Si/Al ratio were synthesized in the presence of n-butylamine (NBA)
tetrapropyl ammonium (TPA+) and no template (NT)
respectively. The samples were characterized by XRD
TEM
NH3-TPD
N2 sorption analysis and applied to n-hexane cracking to investigate the difference of their acid characters
cracking selectivity and lifetime. The results showed that the samples had different acid properties and acid distribution in spite of similar Si/Al. Under the same initial conversion
the samples exhibited different product distribution. ZSM-5 using NBA and TPA+ showed higher selectivity of ethylene and propylene than ZSM-5 without template. However
the latter had much longer stable period than the former two and its conversion could stay above 96% for 1200 min.