Successive steps of hydration and dehydration of silicoaluminophosphates H-SAPO-34 and H-SAPO-37 investigated by in situ CF MAS NMR spectroscopy

Thermal stability and dehydroxylation of

Thermal stability and dehydroxylation of Brønsted acid sites in silicoaluminophosphates H-SAPO-11, H-SAPO-18, H-SAPO-31, and H-SAPO-34 investigated by multi-nuclear solid-state NMR spectroscopy

✍ A Buchholz; W Wang; M Xu; A Arnold; M Hunger 📂 Article 📅 2002 🏛 Elsevier Science 🌐 English ⚖ 203 KB

The thermal stability and dehydroxylation of the microporous silicoaluminophosphates H-SAPO-11, H-SAPO-18, H-SAPO-31, and H-SAPO-34 were investigated after thermal treatment at temperatures of 773-1173 K. While no change of the crystallinity upon thermal treatment at 1173 K was found by X-ray diffra