Study of catalytic properties of SAPO-40

• Author(s): Lourenço, J. P. ; Ribeiro, M. F. ; Ribeiro, F. R. ; Rocha, J. ; Gabelica, Z. ; Dumont, N. ; Derouane, E. G.
• Date: 1994
• Persistent ID: http://hdl.handle.net/10400.1/1064
• Origin: Sapientia - Universidade do Algarve
• Subject(s): SAPO-40; Synthesis
• Document Type: Conference Object
• Language: English

Description

A series of SAPO-40 samples with Si atomic fraction from 0.06 to 0.12 has been synthesised. The study of their catalytic properties has been evaluated by comparison with SAPO-37, USHY and mordenite, using as model reaction the cracking of n-heptane. The catalytic activity of SAPO-40 samples depends on the Si content, and is probably associated with the non-uniform distribution of silicon. SAPO-40 showed a stronger acidity than SAPO-37 with a similar Si content. SAPO-40 is more resistant to deactivation by coke than the studied mordenite sample. Its selectivity for cracking products is comparable to USHY, but hydrogen transfer is lower for SAPO-40 than for USHY and mordenite.