Acidity and catalytic activity of SAPO-5 and AlPO-5 molecular sieves

✍ Scribed by S.G. Hedge; P. Ratnasamy; L.M. Kustov; V.B. Kazansky

• Publisher: Elsevier Science
• Year: 1988
• Tongue: English
• Weight: 432 KB
• Volume: 8
• Category: Article
• ISSN: 0144-2449
• DOI: 10.1016/s0144-2449(88)80080-0

✦ Synopsis

The acidic sites of aluminophosphate (AIPO-5) and silicoaluminophosphate (SAPO-5) molecular sieves have been investigated using diffuse reflectance i.r. spectroscopy, temperature-programmed desorption (t.p.d.) of NH3, and catalytic activity in the cracking of cumene and oligomerization of ethylene. The results are compared with those obtained for HZSM-5 and HY zeolites. It is concluded that these zeolites can be arranged in the following decreasing sequence of BrGnsted acid site strength: HZSM-5 > SAPOM5 > HY + AIPO-5.