The type 11 aluminophosphate molecular sieves containing different substituted elements (viz. Mg, Si, Mn, Ni) have been synthesized and characterized for their crystalline nature, N,-sorption capacity and morphology. Also, the MnAPO-11 molecular sieves with different concentrations of framework-subs
Structure, acidity and catalytic properties of dealuminated SAPO-11 molecular sieves
โ Scribed by Huiping Tian; Chenglie Li
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- English
- Weight
- 325 KB
- Volume
- 149
- Category
- Article
- ISSN
- 1381-1169
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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.
Organic-functionalized molecular sieves silicoaluminophosphates with AFI and AEL topologies have been first hydrothermally synthesized by using 1,4-bis(triethoxysilyl) benzene (BTEB) as unique silicon source. Various techniques have been performed to characterize the structures of the two molecular