Abstract
The structural changes occurring in the template-free SAPO-5 and SAPO-34 upon the rehydration are reversible and do not affect their acidity and catalytic activity. The rehydrated SAPO-37 loses irreversibly a considerable part of its initial crystallinity, surface area, acidity and catalytic activity. Nevertheless the remaining acid centers are stable against dehydrationrehydration cycles.
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Minchev, Neinska, Y., Valtchev, V. et al. Effect of the rehydration on the acidity and catalytic activity of SAPO molecular sieves. Catal Lett 18, 125–135 (1993). https://doi.org/10.1007/BF00769505
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DOI: https://doi.org/10.1007/BF00769505