SAPO-11 Molecular Sieves Synthesized from Aluminum Isopropoxide and SiO2 with Various Dispersions

被引：0
作者：
Agliullin, M. R. [1 ]
Serebrennikov, D., V [1 ]
Bubennov, S., V [1 ]
Kuvatova, R. Z. [1 ]
Kutepov, B., I [1 ]
Maximov, A. L. [2 ]
机构：
[1] Russian Acad Sci IPC RAS, Ufa Fed Res Ctr, Inst Petr Chem & Catalysis, Ufa 450075, Russia
[2] Russian Acad Sci, Topchiev Inst Petrochem Synth, Moscow 119991, Russia
来源：
PETROLEUM CHEMISTRY | 2022年 / 62卷 / 08期
基金：
俄罗斯科学基金会;
关键词：
zeolites; SAPO-11; silicoaluminophosphate; nanocrystals; oligomerization; CATALYTIC PERFORMANCE; N-ALKANES; HYDROISOMERIZATION; ZEOLITES; ACIDITY; TEMPLATE; METHANOL; OCTANE; GEL;
D O I：
10.1134/S0965544122070076
中图分类号：
O62 [有机化学];
学科分类号：
070303 ; 081704 ;
摘要：
Various methods, such as XRF, XRD, SEM, N-2 adsorption/desorption, NH3-TPD, and IR spectroscopy of adsorbed pyridine, were used to characterize SAPO-11 samples crystallized from Al-isopropoxide as an aluminum source and from SiO2 with various dispersions (4, 22, and 200 nm) as a silicon source. Decreasing the size of SiO2 particles was shown to enhance the total concentration of acid sites and to affect the morphology and increase the dispersion of the primary crystals. These SAPO-11 samples were then tested in the oligomerization of a-methylstyrene into its valuable dimers. The SAPO sample synthesized using a SiO2 sol with an average particle size of 4 nm exhibited a higher concentration of strong acid sites and higher accessibility of those sites than the other tested samples. These advantages allowed this SAPO sample to achieve the highest monomer conversion and the highest a-methylstyrene dimer selectivity.
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页码：843 / 852
页数：10
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