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ZSM-5 zeolites with SiAl ratios of 23, 72 and > 400 were synthesized in the laboratory as Na + and cation (H + , Co 2+ , Cu 2+ , Fe 2+ and Zn 2+ )-exchanged forms and were examined by nitrogen and argon porosimetry. Na-ZSM-5 of any SiAl ratio and high-alumina ZSM-5 (SiAl = 23) zeolites of any exchanged cation display single transition...
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