Acid properties and morphology of SAPO-11 molecular sieve controled by silica source

被引：17

作者：

Agliullin, Marat R. ^{[1
]}

Kolyagin, Yury G. ^{[3
]}

Serebrennikov, Dmitriy V. ^{[1
]}

Grigor'eva, Nellya G. ^{[1
]}

Dmitrenok, Andrey S. ^{[4
]}

Maistrenko, Valery N. ^{[5
]}

Dib, Eddy ^{[2
]}

Mintova, Svetlana ^{[2
]}

Kutepov, Boris I. ^{[1
]}

机构：

[1] UFRC RAS IPC RAS, Inst Petrochemistry & Catalysis, Ufa St Prospekt Oktyabrya 141, Moscow 450075, Russia

[2] Normandie Univ, Lab Catalyse & Spectrochimie, ENSICAEN, UNICAEN,CNRS, 6 Bd Marechal Juin, F-14050 Caen, France

[3] Moscow MV Lomonosov State Univ, Dept Chem, Lenin Hills 1-3, Moscow 119991, Russia

[4] RAS, ND Zelinsky Inst Organ Chem, Leninsky Prospect 47, Moscow 119991, Russia

[5] Bashkir State Univ, Ufa St Zaki Validi 32, Moscow 450076, Russia

来源：

MICROPOROUS AND MESOPOROUS MATERIALS | 2022年 / 338卷

基金：

俄罗斯科学基金会;

关键词：

SAPO-11; silicoaluminophosphate; SAPO-11 nanosized crystals; Sol-gel method; Dimerization of a-methylstyrene; ENHANCED HYDROISOMERIZATION; N-OCTANE; CATALYTIC PERFORMANCE; SI DISTRIBUTION; ISOMERIZATION; ZEOLITES; ALKANES; GEL; CRYSTALLIZATION; NANOSHEETS;

D O I：

10.1016/j.micromeso.2022.111962

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

This paper reports on the control of strong acid sites in SAPO-11 molecular sieve crystals using different silica sources. The crystallization process of the SAPO-11 molecular sieves was performed using silicon sources with different particle sizes, i.e., fumed silica (200 nm), colloidal silica (22 nm), and SiO2 sol prepared by the sol-gel method (4 nm). The SiO2 sol proved to have a significant effect on the acidic properties, morphology and crystal size of SAPO-11 molecular sieve. Moreover, more efficient incorporation of silicon is achieved, providing an increased concentration of acid sites. The SAPO-11 intergrown crystals with a size of 100-300 nm exhibited hierarchical pore structure (SBET - 250 m(2)/g and Vmeso - 0.27 cm(3)/g) were synthesized using the SiO2 sol precursor. The SAPO-11 molecular sieves were tested in the reaction of a-methylstyrene dimers synthesis. The SAPO-11 samples, synthesized by SiO2 sol showed the highest monomer conversion and linear dimer selectivity.

引用

页数：9