Synthesis of AlPO4 Molecular Sieves with AFI and AEL Structures by Dry-Gel Conversion Method and Catalytic Application of Their SAPO Counterparts on Isopropylation of Biphenyl |
| |
Authors: | Rajib Bandyopadhyay Mahuya Bandyopadhyay Yoshihiro Kubota Yoshihiro Sugi |
| |
Affiliation: | (1) Department of Chemistry, Faculty of Engineering, Gifu University, Gifu, 501-1193, Japan |
| |
Abstract: | AlPO4-5 and AlPO4-11 were synthesized by dry-gel conversion (DGC) method. Steam-assisted conversion (SAC) and vapor-phase transport (VPT) techniques were applied for this purpose. The synthesis was successful in presence of a certain minimum amount of external bulk water, without which the crystallization failed. Crystallization by VPT method was slower than corresponding SAC and HTS method. SAPO analogs of the samples, SAPO-5 and SAPO-11 were also synthesized by DGC method. Samples made by DGC methods had higher yield than the conventional hydrothermal synthesis (HTS); otherwise the samples showed similar characteristics as that made by HTS. XRD, SEM and N2-adsorption results showed high crystallinity and purity of the samples made by DGC, and 27Al MAS NMR spectra indicated the tetrahedral framework nature of Al. SAPO-5 and SAPO-11 were tested for their catalytic activity in isopropylation of biphenyl, and in terms of conversion and selectivity, SAPO-5 was found to be suitable for this application. |
| |
Keywords: | AlPO4-5 AlPO4-11 SAPO-5 SAPO-11 dry-gel conversion (DGC) steam-assisted conversion (SAC) vapor-phase transport (VPT) isopropylation biphenyl (BP) |
本文献已被 SpringerLink 等数据库收录! |
|